Home

SATELLINE 1870 & 1870 E user guide

1. 26 5 1 Serial interface data 2 2 0 0202222 26 5 2 Handshake lInes iere bee ite Ert ERI ERA GENLBP vado ERR DIRAS 27 5 21 ec dd vr Ro fs efie 27 85242 RUSHING 29 5 3 Timing and delays during data 29 5 3 1 Data buffering in the radio data Modem bi btt aa ete e ius 29 5 3 2 Pause length EE 30 Daud arcu teu v pr RP M 36 M TESS 40 534 T Short Dlock e tte Oe tones tete 41 DIGCKCEIeSEs oto rob o dte rid 41 FAZ UN 41 5 5 4 SATELEINE 1870 test oie et er e Go ta te oe iret Les 41 5 4 5 Monitoring the test transmission using the 41 6 REPEATER MODE AND ADDRESSIN 6 ure essor uua 42 6 1 Repedter secret satin 42 6 1 1 Connecting a repeater to a 1 nenne 43 43 6 2 1 Primary and secondary transmit and receive addresses 43 6 2 2 Reading the address from the user 1 1 2
2. 1 3 DATA pal j REPEATER DATA part 1 2 j DATA part 2 3 The DTE of modem 1 starts to transmit the first part of the serial message Modem 1 starts transmission modem 2 will receive the message Modem 1 detects a pause and stops the transmission pause pause length setting Modem 2 will start repeating the message received from modem 1 Modem 3 receives the repeated message The DTE of modem 1 starts to transmit the second part of a serial message Modem 2 is still repeating the first part of the message Modem 1 will not start transmission because it detects that the RF channel is busy Modem 2 is transmitting REPEATER DATA part 2 7 1 REPEATER 1 3 Modem 2 transmission stop Modem 1 starts transmitting the buffered second part of the serial message Modem 2 will receive the second part of the message Modem 2 will start repeating the message received from modem 1 Modem 3 receives the repeated message In this example DTE 3 will experience a very long significant delay between DATA part 1 and DATA part 2 Note that the DTE connected to modem 3 will experience this delay as an inter character delay The delay between DATA part 1 and DATA part 2 will be gt 1 the transfer delay from modem 1 to modem 2 33
3. 1 RX address ON 2 TX address OFF 3 Change primary RX address 0000 4 Change primary TX address 0000 5 Change secondary RX address 0000 6 Change secondary TX address 0000 7 protocol 1 Address from RS 232 user protocol OFF 8 protocol 1 Start char of HEX ASCII DO 9 protocol 1 Address offset of user protocol 0 A protocol 1 Type of address field 1 BYTE B Hop count Time To Live 15 C protocol 2 Address from RS 232 user protocol OFF D protocol 2 Start char of HEX ASCII DOC E protocol 2 Address offset of user protocol 0 F protocol 2 Type of address field 1 BYTE G TX address bitmapping OFF H RX address masking OFF I Repeater address bypassing OFF J Subnet mask 1 0000 K Subnet mask 2 0000 Enter selection or ESC to previous menu gt Enter selection or ESC to previous menu 3 RX Address Setup RX Address HEX ESC to cancel gt 0020 Enter new address The address is given in hexadecimal format with four digits and the number of different addresses is thus over 65 000 7 1 4 Changing serial port settings The settings of the serial port can be modified by selecting main menu selection 4 and by then selecting the desired settings The programming of the serial port parameters is demonstrated below In the following example the serial port settings are set to 9600 bps 8 data bits 1 stop bit no parity Enter selection gt 4
4. HEX addresses Addresses consisting of HEX type are the direct inary content of the adress field of the user protocol presented in HEX format 6 8BT HE 7 16 BIT HEX 47 SATELLIN E 1870 and 1870E User Guide version 4 0 NO TE When detecting a new message the modem will first check if the message fulfils the rules of protocol 1 if not the message is compared to the rules of protocol 2 If the message does not fulfil the rules of either protocol the data will not be transmitted The table below will give suggested protocol settings for a few commonly used industrial protocols PROTOCOL MO DBUS MO DBUS M BUS IEC ASCII RTU 60870 5 101 M MASTER S SLAVE M S M S M S Pause length 200 1 200 1 3 3 3 3 Protocol 1 ON O FF ON O FF ON O FF Address from RS232 protocol Protocol 2 O FF O FF O FF O FF ON O FF Address from RS232 protocol RX address ON ON ON ON ON ON TX address ON ON ON ON ON ON Protocol 1 3A 2A HEX 68 start character HEX Protocol 1 1 0 5 Address offset Protocol 1 16 bit 8 bit 8 bit Type of address field Protocol 2 10 start character HEX Protocol 2 2 Address offset Protocol 2 8 bit 8 bit Type of address field NOTE 1 The time should be set to be as long as the worst measured inter character delay If the MO DBUS serial stream originates from a PC hardware running MS Window
5. gt OTT 1 2 C D E G H I J K L M N Q R 5 T U 69
6. PROG O perational mode active low weak pull up Instruction When the connected to ground GND SGND the radio modem enters the Programming Mode which is for changing the settings of the radio modem i e configuration set up If the PRO G line is not connected the radio modem will enter the Data Transfer Mode in which data can be transmitted and received The Programming Mode is used only when installing a radio modem and changing the parameters of a modem TS Regulated 5 5 V 5 3 5 7 V DC output Maxload 100 mA Intended to AUX power external devices made by SATEL e g RS LIN K MIN I LIN K 15 Notconnected 5922 116 JIN SGND Signal ground internally connected to GND 2 NOTE For cables 1m the DTR should not be left unconnected in order to prevent disturbances from pulling DTR low and thus shutting down the modem 16 SATELLIN E 1870 and 1870E User Guide version 4 0 2 1 2 RS 232 interface RS 232 standard defines the method of serial data transfer between a computer and its peripherals The definition includes both the interface type and signal levels Most computers and peripherals contain one or more RS 232 type serial ports The RS 232 standard uses transmission lines in which each single signal line level is referenced to a common ground level RS 232 has been designed to be use in serial transfer of data in cases where the distance between communicating equipment is less than 15 m
7. 58 SATELLINE 1870 and 1870E User Guide version 4 0 Serial port 1 Settings 1 Data speed 1200 s 2 Data bits 7 bit data 3 Parity bits Even parity 4 Stop bits 2 stop bit 5 RS 232 Pause length 3 bytes Enter selection or ESC to previous menu gt 1 port 1 data 300 bit s 600 bit s 1200 bit s 2400 bit s 4800 bit s 9600 bit s 19200 bit s Enter selection or Speed ESC to previous menu gt 6 Serial port 1 Settings 1 Data speed 9600 bit s 2 Data bits 7 bit data 3 Parity bits Even parity 4 Stop bits 2 stop bit 5 RS 232 Pause length 3 bytes Enter selection or ESC to previous menu 2 Serial port 1 data 1 7 bit data 2 8 bit data Enter selection or Bits ESC to previous menu 2 Serial port 1 Settings 1 Data speed 9600 bit s 2 Data bits 8 bit data 3 Parity bits Even parity 4 Stop bits 2 stop bit 5 RS 232 Pause length 3 bytes ESC to Enter selection or previous menu 3 1 None parity 2 Even Parity 3 Odd Parity Enter selection or Serial port 1 parity bits ESC to previous menu gt 1 59 SATELLIN E 1870 and 1870E User Guide version 4 0 Serial port 1 Settings 1 Data speed 2 Data bits 3 Parity bits 4 Stop bits 5 RS 232 Pause length Enter selection or 9600 s 8 bit data None parity 2 stop bit 3 bytes ESC to previous menu
8. 46 6 2 3 Hop Count Time to HVes TTL iuncto ee eee tice ed 49 6 2 4 Connection between tWo conseto C e a elt o E E m da etm ee tend 50 6 3 Using repeaters and addresses in the same lt 50 6 3 1 Repeater chain using dual addressing 0 00000000 50 6 3 2 Parallel repeater chains using dual addressing 51 T SETTING TREE 53 7 1 Changing parameters using a terminal 53 7 1 1 Changing frequency active radio channel 54 SATELLIN E 1870 and 1870E User Guide version 4 0 7 1 2 Changing radio settings power and sensitivity 55 FAS Changing addressifiQ uat fett o P t Ex vo dire Ee a eite teet 57 7 1 4 Changing serial port co e e eo se 58 7 1 5 Modification of handshaking functions 61 TE Special TUNCHONS ropes i b E a M ed 61 TALZ Activa ng tests mE 62 7159 Restoring factory Seting 5 ae tbi e in be ede ee 62 7 1 10 Saving modified settings into the permanent 63 7 2 Changing parameters using the SL CO 63 prag BI uultu 64 7 2 2 Extended d ase mid
9. lt LF gt ASCII char no 10 Line Feed 0x0a If multiple SL commands are sent to the radio modem the nex command can be given after receiving the response the requested value or Error of the proceeding command In addition it is recommended to implement a timeout to the terminal software for recovering the case when no response is received from the radio modem When the power of a radio modem is switched off the configuration settings of a radio modem always return to values defined initially using the Programming M ode thus resetting any settings changed using SL commands during power on It is however possible to save settings changed by using SL commands and to make them the new configuration settings By default changes made with SL commands are not saved to the permanent memory to prevent its excessive wear out The radio modem will acknowledge all commands by returning an O K command carried out or accepted or the requested value or an command not carried out or interpreted as erroneous message 63 SATELLIN E 1870 and 1870E User Guide version 4 0 7 2 1 Frequency Effect and description of command SL amp F nnn nnnn Set frequency to nnn nnnn M Hz SL amp F Display current frequency response is nnn nnnn MHz SL amp B n Select sub band n Display current sub band 5 lowest and highest frequencies response is nnn nnnn MHz nnn nnnn MHz Set channel number channel numbers are
10. 1252 CVG S ce oo rale ota tle t ero eter d i 10 1 2 4 POWER level nost be a Ui vt e ose E e ee dev ut 10 1 2 5 Channel assignment a m e eund 12 1 3 Basic configuration and installation 13 1 3 1 Mounting in vehicularenvironmielit sucrose ea toro ret rt rt beige rt toi centenis 14 2 CONNECTIONS uii eol ce ve Loin Ern dan teo Quis ver dr 15 2 1 DIN41651 16pin connector 5 15 13 25152 RS 232 interface 17 3 ees 18 18 3 2 ieu ees ee eI VERUS FEX ey EUR 19 3 3 TX NJ OA E CU ei nra 20 3 4 Error CHECKING 55 a Fee EUR Dx emi Ux eta uto VI Eve EVANS 20 3 5 Limit radio frame a EP AME 22 SATELLIN E 1870 and 1870E User Guide version 4 0 4 USERCINTERFAC cr 23 23 4 2 Self 23 4 3 Programming Mode sore ir yx EE EHE ad ER ERR ORC ER ERU XR AG 24 4 3 1 Changing settings tut pausa maesti aue teta amv dan 24 4 3 2 Restoring factory SSEDTIQS 25 5 TRANSPARENT DATA 5 55
11. 2 i 1 DATA part 2 DATA part 2 The DTE of modem 1 starts to transmit a serial message Modem 1 starts transmission modem 2 will receive the The DTE of modem 1 makes a pause in the serial stream Modem 1 will continue trans mitting because the pause the pause The DTE of modem 2 sends a message Might be a reply to the partial message NACK response or ARQ message or The DTE of modem 1 starts to transmit the second part of a serial message Modem 1 continues the transmission message length setting a pause other transmission is not detected Modem 2 will detect that the RF channel is busy and will not start the transmission y 1 D 2 2 1 1 DATA2 Modem 1 stops transmission when the tx buffer is empty and a pause that is longer than the pause length setting has been detected on the serial line Modem 2 senses that the radio channel is free and starts trans mitting the message buffered earlier DATA 2 Notice how no inter character delay has been added by the modems 32 Example 3 Three modems modem 2 is a repeater All modems have the following settings TX priority OFF Pause Length 120 Application ie PPP communication SATELLIN E 1870 and 1870E User Guide version 4 0 REPEATER mj DATA part 1 2 DATA part 1 1 D
12. 869 7625 4 868 0875 568 6875 868 7875 869 4875 869 7875 1868 11 85 8695125 8694815 6 1868 1375 8875 869535 7 868 1625 68 5 8695625 869 8625 8 6485 568 8875 8695875 869 8875 9 868 212 8045 869 6125 869 9125 101 6235 895 869 635 869 35 11 82625 865 1869965 12 j8682875 8985 869085 1 8683125 6 05 156 j8683375 64055 o 15 8683625 86965 15 j868387 6 4085 p 5 1869 1125 ae 868 4375 j869 1375 7 19 8684625 Jo 868 4875 j8691875 22 4686535 24 88555 111 12 SATELLIN E 1870 and 1870E User Guide version 4 0 1 3 Basic configuration and installation The radio modem is shipped with the following default settings unless specifically ordered with settings other than those listed below Radio Frequency Range 868 870 MHz Channel Spacing 25 kHz Serial Interface Type RS 232 ADJUSTABLE SETTINGS Radio Settings 100 mW 1870 500 mW 9 1870E RSSI threshold 113 dBm Addressing All addressing modes are set to O FF Serial Port 1 9600 8 bitdata None 1 stop bit Handshaking CTS Clear to send RTS Ignored Additional settings Error check FF Repeater FF SL Commands FF Radio TX prio
13. SATELLIN E 1870 and 1870E User Guide version 4 0 2 the length of the second part of the message because of the store forward nature of the repeater 3 the transfer delay from modem 2 to modem 3 Assume that the entire message is 100 characters and transfer speed is 9600 Data 1 is 40 characters and data 2 is 60 characters The delay between data 1 and data 2 at the output of modem 3 will thus be 70 ms 60 ms 70 ms 200 ms Example 4 Three modems modem 2 is a repeater All modems have the following settings TX priority OFF Pause Length 120 Application ie PPP communication REPEATER DATA part 1 2 1 j DATA part 1 1 3 je 3 2 j pause 3 REPEATER DATA part 2 2 j V DATA part 2 3 1 The DTE of modem 1 starts to transmit the first part of a serial message Modem 1 starts transmission modem 2 will receive the message Modem 1 continues transmission because the pause is the pause length setting Modem 1 continues the transmission and transmits the second part of the serial message Modem 2 will receive the second part of the serial message REPEATER 7 2 j pause 1 3 Jes 2 DATA part 1 1 3 and part 2 Modem 1 stops the transmission when a pause of sufficient length has been detected pause gt pause length se
14. The address is composed of two bytes totalling 16 bits resulting in over 65 000 different address combinations The address is attached to the beginning of each radio transmission radio frame When a radio modem receives a data packet when using addressing mode the radio modem will check the address field of the received radio frame to ensure that the address of the received packet matches either the primary or secondary address of the receiving modem ADDRESS DATA Address may be selected between 0000h FFFFh h hexadecimal corresponding decimal numbers are 0 65535 44 SATELLIN E 1870 and 1870E User Guide version 4 0 The following examples will clarify the function of the settings Transmission DATA 5 DATA ADDRESS DATA TX addressing O FF TX addressing ON Radio modem will transmit the data packet as The radio modem will add the primary TX address to such the beginning of each frame transmission on the radio interface Reception ADDRESS DATA 2 ADORESS DATA DATA RX addressing ON RX addressing ON a The primary and or secondary address is Both the primary and secondary RX addresses of the identical to the address of the transmitting radio modem are different from the address of the modem received radio interface frame b Repeater function ON the secondary address is identical to the Data does not
15. The otherwise useful RS 232 standard is applied in a multitude of slightly differing ways e g different pin configurations and for this reason different computers and peripherals are not necessarily directly compatible with each other NO TE When connecting equipment using RS 232 make sure that the equipment are to be connected together or share the same ground potential or that the signal ground of one and or both of the devices are floating Major differences in ground potentials will lead to large currents flowing in the GND wire of the RS 232 interface which might lead to malfunctions or damage to the connected devices 17 SATELLIN E 1870 and 1870E User Guide version 4 0 3 RF Interface The antenna connector type is a SMA female with an impedance of 50 ohm The user can change the frequency of the radio modem within the 868 870 MHz frequency band The raw data rate of the radio interface is always fixed 9600 bps irrespective of the data speed of the serial interface In cases where the terminal speed exceeds the throughput of the radio interface approximately 9600 bps the modem will buffer the data in order to prevent data loss 3 1 Transmitter The output power of the transmitter is adjustable The greatest allowable power which must not be exceeded depends on the selected sub band and the limits set by local authorities The output power of the transmitter should be set to the smallest possible level which st
16. Use of duty cycles exceeding the duty cycle limit may lead to prosecution and penalties SATEL is not responsible for any illegal use practiced with any devices manufactured and or sold by SATEL and is not liable to pay any damages or compensation caused by such illegal use 7 1 2 Changing radio settings power and sensitivity Radio settings which consist of transmitter output power and receiver sensitivity can be configured by selecting main menu selection 2 In the following example both the transmitter output power 5 mW 100 mW and the receiver sensitivity 110 dBm 45 dBm are changed Transmitter output power levels 250 mW and 500 mW also available in 1870E version Enter selection 2 Radio setup 1 TX power level 10 mW 2 Signal threshold level 113 dBm 3 TX start delay 0 ms Enter selection or ESC to previous menu gt 1 TX power setup 1 5 mW 2 10 mW 3 25 mW 4 50 mW 5 100 mw Enter selection or ESC to previous menu 5 55 SATELLIN E 1870 and 1870E User Guide version 4 0 Radio setup 1 TX power level 100 mW 2 Signal threshold level 113 dBm 3 TX start delay 0 ms Enter selection or ESC to previous menu gt 2 RSSI threshold level setup Received Signal Strength Indicator RSSI threshold level 113 dBm Enter new value 120 40 or ESC to cancel 110 Radio setup 1 TX power level 100 mW 2 Signal threshold level 110 dBm
17. gt 4 1 1 stop bit 2 2 stop bits Enter selection Serial port 1 stop bits or ESC to previous menu 1 Serial port 1 Settings 1 Data speed 2 Data bits 3 Parity bits 4 Stop bits 5 RS 232 Pause length 9600 bit s 8 bit data Even parity 1 stop bit 3 bytes Enter selection or ESC to previous menu 5 RS 232 Pause length Pause length 3 Enter selection or Enter new value 1 255 or ESC to cancel gt 10 Serial port 1 Settings 1 Data speed 9600 bit s 2 Data bits 8 bit data 3 Parity bits Even parity 4 Stop bits 2 stop bit 5 RS 232 Pause length 10 bytes ESC to previous menu gt The settings of the serial port must be modified to correspond with the settings of the terminal device that is to be connected to the radio modem NOTE It should be noted that switching the radio modem into Programming Mode by connecting the PRO pin 7 of DIN41651 connector to ground GND will change the settings of serial port to 9600 8 N 1 automatically irrespective of the serial port data transfer mode settings 60 SATELLIN E 1870 and 1870E User Guide version 4 0 7 1 5 Modification of handshaking functions Handshaking related configuration settings may be modified by selecting option 5 from the main menu In the following example characteristics of the CTS line CLEAR TO SEND TX BUFFER STATE RTS line IGNO RED
18. 7000 MHz max power 25 mW 8 Subband8 869 7000 870 0000 MHz max power 05 mW Enter selection or ESC to previous menu gt Choose the desired sub band by selecting the number in the beginning of the corresponding row i e press 6 to select sub band no 6 O nce a number is pressed the menu will return to the previous sub menu Now select 2 to enter the desired frequency Enter selection or ESC to previous menu 2 Enter selection or ESC to previous menu gt 2 Radio frequency setup Active frequency 869 4125 MHz Enter new frequency MHz or ESC to cancel Enter the new frequency Be sure that the frequency matches the frequency plan channel list presented in chapter 1 2 54 SATELLIN E 1870 and 1870E User Guide version 4 0 NOTE Adjustment of the active radio channel of the radio modem to frequencies other than those allocated and or allowed by local authorities is strictly forbidden Use or intended use of forbidden frequencies may lead to prosecution and penalties SATEL is not responsible for any illegal use practiced with any devices manufactured and or sold by SATEL and is not liable to pay any damages or compensation caused by such illegal use NOTE The duty cycle of the device is not controlled by the radio modem the system that operates the modem controls the duty cycle of the modem Exceeding the duty cycle limits set by authorities is strictly forbidden
19. Pause length 3 5 Handshaking CTS Clear to send RTS Ignored 6 Additional setup Repeater OFF SL ON Block CRC OFF TX priority ON Power save OFF Frame limit OFF SL Extended OFF Full frame CRC OFF 7 Tests Test mode Inactive 8 Restore factory settings E EXIT and save settings Q QUIT without saving Enter selection 53 SATELLIN E 1870 and 1870E User Guide version 4 0 7 1 1 Changing frequency active radio channel frequenc The frequency of the radio is controlled from a sub menu Press 1 to display the frequency control menu Enter selection gt 1 Radio frequency setup 1 Active subband 6 869 4000 869 6500 2 Radio frequency 869 4125 MHz Enter selection or ESC to previous menu The frequency is set by first selecting the desired sub band and then by selecting the desired frequency from that sub band To set the sub band press 1 a menu will be displayed Enter selection or ESC to previous menu 1 Enter selection or ESC to previous menu gt 1 Radio Subband Selection 1 Subbandl 868 0000 868 6000 MHz max power 25 mW 2 Subband2 868 6000 868 7000 MHz max power 10 mW 3 Subband3 868 7000 869 2000 MHz max power 25 mW 4 Subband4 869 2500 869 3000 MHz max power 10 mW 5 Subband5 869 3000 869 4000 MHz max power 10 mW 6 Subband6 869 4000 869 6500 MHz max power 100 mW 7 Subband7 869 6500 869
20. Setting this function to O N will cause the transmitting modem to limit the frame length to approximately 1kB When this limit is reached the modem will end the current frame properly and start the transmission of a new frame The downside of this function is that it is not possible to transmit data during the transmission of the synchronisation pattern During actual reception this property will appear as a 20 ms approximate value pause in the reception of data This might cause errors in systems which are based on the monitoring of the pauses between individual transmitted data packets 22 SATELLIN E 1870 and 1870E User Guide version 4 0 4 USER INTERFACE 4 1 LED indicators There are five 5 LED indicators on the front panel of the radio modem and they give an indication of the status of the serial port and the radio interface LED Tess OFF eee Radio status Transmission Noise Reception RD satus Node CTS satus mache Adwe RIS satus macie Description of the LED indicators CD indicates the status of the radio interface The status of the CD signal on the serial interface may differ from the status of the LED indicator RD indicates that the radio modem is sending data via the serial port RD line pin 10 TD indicates that the radio modem is receiving data via the serial port TD line pin 12 CTS indicat
21. appear on the RS 232 interface address of the transmitting modem c Primary RX address is FFFFh all addressed frames will be received d Repeater function ON Primary and or secondary address is 0000h all addressed frames will be received and repeated The radio modem will remove the address and send only the actual data to the RS 232 interface 45 SATELLIN E 1870 and 1870E User Guide version 4 0 DATA ADDRESS DAT DATA DATA DATA RX addressing O FF RX addressing O FF RX addressing O N The radio modem will The radio modem will not receive There is no address in the transfer all frames which any air interface frames containing received radio interface frame do not contain an address addresses Received data is Data will not be received transmitted to the RS 232 Data will not be received The modem will receive only interface addressed frames 6 2 2 Reading the address from the user protocol In cases where the modems are used to transfer a protocol that contains addresses or fields that can be considered as addresses the modem can be configured to read the address from the protocol This feature can be used to read the address from the protocol and route the message through repeaters to the intended recipient modem In order to work with SATELLIN E 1870 the protocol should have the following characteristics Messages are separate
22. is 0 or 1 the data will not be repeated If the received TTL is 2 or greater the data will be repeated The TTL of the repetition will be the received TTL 1 NO TE The hop count parameter is only used in addressed radio transmissions If hop count is desired but addresses are not needed the addressing would have to be turned ON in all modems RX1 should be set to FFFF in all modems This way hop count is used but addresses are ignored An example will demonstrate the operation of the hop count parameter E REPEATER b REPEATER TTL 2 a 4 BATA 2 2 3 MES 1 DATA 4 H 4 Modem l hasa TTLof2 or greater The Repeater modem 2 is repeating the Modem 1 is transmitting received message The repeat will be transmitted with the original TTL 1 TTL 2 NO REPETITION E REPEATER C 3 DATA 2 C 4 gt The second repeater modem 3 checks the TTL count from the received message If the received TTL is 2 the message will not be repeated The received data will be transmitted to the local DTE 49 SATELLIN E 1870 and 1870E User Guide version 4 0 6 2 4 Connection between two points When forming a connection between two points it is recommended that both the reception and transmission addresses are identical in both radio modems This is th
23. is forbidden without the written consent of SATEL SATEL PRO DUCTS HAVE NOT BEEN DESIGNED INTENDED NOR INSPECTED TO BE USED IN ANY LIFE SUPPO RT RELATED DEVICE OR SYSTEM RELATED FUNCTION NOR AS A PART OF ANY O THER CRITICAL SYSTEM AND ARE GRANTED NO FUNCTIONAL WARRANTY IF THEY ARE USED IN ANY OF THE APPLICATIO NS MENTIONED Salo FINLAND 2008 SATELLIN E 1870 and 1870E User Guide version 4 0 RESTRICTIONS ON USE The models SATELLIN E 1870 and 1870E referred to in this user guide as SATELLIN E 1870 are designed to operate in the countries listed below on the licence free frequency band of 868 000 870 000 MHz not incorporating the band 869 2 869 25MHz according to the recommendation CEPT ERC REC 70 03 This recommendation has been drawn up by the European Radio communications Committee ERC under CEPT In this recommendation there has been defined limits for the use of transmit receive duty cycle and radiated output power In addition please pay attention to the possible local restrictions stated by the national radio authorities SATELLIN E 1870 is allowed to be use in the CEPT countries according to the following list AT BE BG DE DK EE FI FR GR HR IS IE IT NL NO PL PT SK ES SE CH UK and ZA SATELLIN E 1870E is allowed to be use in the CEPT countries according to the following list AT BE DK FI FR DE GR IS IT NL PL PT SK ES SE CH and UK SATELLIN E 1870 and 1870E User Guide versi
24. re transmit the buffered data using the same frequency as in reception The maximum size of a repeated data packet is 1 kB kilobyte The Repeater Function is Switched on using the Programming Mode In the repeater mode the radio modem will function as a totally independent unit which means that only a power supply and a suitable antenna are needed O ther devices are not necessary In systems with more than one serially or parallelly chained repeaters addressing must be used to prevent having a message ending up in an infinite loop formed by repeaters and to ensure that the message finally reaches only the intended radio modem An example of a typical application of repeaters is shown in the picture below REPEATER 1 REPEATER 2 m e V gt gt SLAVE STATION 42 SATELLIN E 1870 and 1870E User Guide version 4 0 6 1 1 Connecting a repeater to a local DTE A radio modem configured as a repeater can also be used to receive and transmit data to from a local DTE The data received by the repeater modem will also be transmitted to the DTE interface as in normal modem operation NOTE The data latency for a DTE connected to a modem that is configured as a repeater depends on the repeater operations The function as a repeater has a higher priority than the data transfer from the local DTE 6 2 Addressing Addresses can be used to route a data messag
25. that is has received or in the case of TX priority 2 ON it would stop transmission and send a single character which was looped back by the external converter To prevent this the modem will suppress all data on the TD line while the CTS line is keeping the external converter in transmit mode NOTE Using the default configurations the modem CTS LED usually serves as a power indicator as it is usually ON when no data is being received In the case of CTS external converter control this is not the case The CTS LED will be O FF except when the modem is transmitting data to the DTE port RD line With this handshake mode when no data is being transferred in either direction no LEDs will be O N 28 SATELLIN E 1870 and 1870E User Guide version 4 0 5 2 2 RTS line 1 Ignored RTS line status is ignored 2 Flow control The radio modem transmits data to the terminal device only when the RTS line is active Non active state of the RTS line will force the radio modem to buffer the received data This option is used if the terminal device is too slow to handle data received from the radio modem 3 Reception control RTS line controls the reception process of the radio modem The active state of RTS line enables reception as normal Non active state of the RTS line will interrupt the reception process immediately even if the radio modem is receiving data from the radio interface This option is used to force the radio modem into a
26. the above scenario can be extended to more than two chains by programming the master to use FFFF as either the primary or the secondary receive address This will cause the master modem to receive all messages 51 TXl RX TX2 RX2 TX1 RX1 TX2 RX2 TX1 RX1 TX2 RX2 txd gt 4 md Modem 1 master varies FFFF lt 2 21 32 4 23 12 Modem 5 repeater 51 62 4 53 42 Modem 8 repeater 81 92 4 72 52 SATELLINE 1870 and 1870E User Guide version 4 0 Modem 3 repeater 32 43 34 a 23 Modem 6 repeater 62 73 64 53 Modem 9 repeater 92 A3 94 a 83 A Modem 4 slave 43 txd 34 rxd e 43 34 Modem 7 slave 73 txd v 64 73 64 rxd gt Modem 10 slave A3 v 94 ryd 94 SATELLIN E 1870 and 1870E User Guide version 4 0 7 SETTINGS The configuration of SATELLIN E 1870 radio modems can be easily changed By connecting pin 7 of the DIN41651 connector to ground GND the radio modem will switch to Programming Mode The serial port settings are 9600 bps N 8 1 data transfer speed 9600 bps no parity character length 8 bits and one 1 stop bit By using SL commands active radio channel and addresses can be changed without switching the radio modem into the Programming M ode Ser
27. vehicular environment When installing the modem in a vehicle with the battery in the chassis of the vehicle it is recommended to use a fuse approx 1 2A in the ground wires to the modem GNS and SG ND In vehicular use the modem chassis is often connected to the vehicle chassis either deliberately or thru the antenna ground If this is the case and the modem ground wire is connected to the pole of the vehicle battery and the battery pole has a bad connection to the vehicle chassis due to corrosion etc excessive currents can flow thru the modem as it serves as the return path for the currents drawn from the vehicle battery These excessive currents will in the worst case destroy the modem 14 SATELLIN E 1870 and 1870E User Guide version 4 0 2 CONNECTIONS 2 1 DIN41651 16pin connector functions The radio modem is referred to as DCE Data Communication Equipment whereas the PC is referred to as DTE Data Terminal Equipment SATELLINE 1870 radio modem includes 16 pin DIN41651 type male connector which contains all the connections required to establish communication between the radio modem acting as the DCE and the PC acting as the DTE All EM C requirements set forth by authorities have been taken into account in the design of the radio modem The user of the radio modem is thereby not required to take any special actions regarding EMC shielding of the radio modem NO TE When the PRO G pin pin 7 of the DI
28. vete Reo au Qa o era D D Rv EUR 64 Es NE urb 64 1 2 4 Radio para Meters etu Ta a aaa R 65 Other TUN desereret eet ERE ee beret rte edel erii e Aera rds 66 8 POMER SUPPLY 67 9 ACCESSORIES AND ADDITIONAL EQUIPMENTS 68 9 1 RS Cables e exe E a SER UAE SERA YER e yx EE E SEIS 68 9 2 REA abes ecco eod pp haec Uta pose ane bead RS UE 68 9 3 S D ERI ME OV 68 9 4 Additiorial equipments uoces rex e 68 APPENDIX 69 SATELLIN E 1870 and 1870E User Guide version 4 0 INTRO DUCTION SATEL Oy is a Finnish electronics and telecommunications company specialised in the design and manufacturing of wireless data communication products SATEL designs manufactures and sells radio modems intended for use in applications ranging from data transfer to alarm relaying Systems End users of SATEL products include industrial companies public organisations and private persons SATEL is the leading European manufacturer of radio modems SATEL radio modems have been certified in most European countries and also in many non European countries Primary characteristics of SATELLIN E 1870 are listed below o SA
29. 1 2004 104 EC 27 03 2007 NEMKO Espoo Finland 8060151 SATEL 1 Attestation Satel 08 05 2007 NEMKO Espoo Finland 80602 SATEL TAI EN 60950 1 30 05 2007 NEMKO Espoo Finland Salo on the 12 of March 2008 SATEL Oy 1 155 DATA 3u v Co Tuomas Pitk nen Managing Director gt Pi z 4 1 i 142 FI 24 FINLAN xi KS WT NU RARO E mail infoGsote com www sotel com WIRELESS WORLD LOCAL SOLUTION SATELLIN E 1870 and 1870E User Guide version 4 0 WARRANTY AND SAFETY INSTRUCTIONS Read these safety instructions carefully before using the product o Warranty will be void if the product is used in any way which is in contradiction with the instructions given in this manual or if the housing of the radio modem has been opened or tampered with o The radio modem is to be used only on frequencies allocated by local authorities and Without exceeding the given maximum allowed output power ratings SATEL is not responsible if any products manufactured by it are used in unlawful ways o The devices mentioned in this manual are to be used only according to the instructions described in this manual Faultless and safe operation of the devices can be guaranteed only if the transport storage operation and handling of the devices is appropriate This also applies to the maintenance of the products o To prevent damage to both the radio modem and any terminal devices m
30. 3 TX start delay 0 ms Enter selection or ESC to previous menu 3 TX Delay Setup TX Delay 0 ms Enter new value 0 65535 or ESC to previous menu 100 Radio setup 1 TX power level 100 mW 2 Signal threshold level 110 dBm 3 TX start delay 100 ms Enter selection or ESC to previous menu gt ESC In environments with high levels of interference and when connection distances are short it is often beneficial to use a Signal threshold level value which is approximately 10 20 dBm above the maximum sensitivity level This will prevent unnecessary receive attempts caused by noise NOTE The setting of the transmitter output power of the radio modem to levels in contradiction with transmitter power levels regulated by local or other governmental authorities is strictly forbidden Use or intended use of forbidden transmitter power levels may lead to prosecution and penalties SATEL is not responsible for any illegal use practised with any devices manufactured and or sold by SATEL and is not liable to pay any damages or compensation caused by such illegal use 56 SATELLIN E 1870 and 1870E User Guide version 4 0 7 1 3 Changing addressing Addressing can be switched ON or OFF with the help of main menu selection 3 In the following example a primary RX address transmitter address is switched ON and the corresponding hexadecimal address value is modified 0000 gt 0020 The current val
31. FLOW CONTRO L are changed Enter selection gt 5 Serial port 1 Handshaking CTS line property Clear to send 2 RTS line property Ignored Enter selection or ESC to previous menu 1 Select CTS line property CTS line property 1 Clear to send 2 TX buffer state 3 RSSI threshold 4 Always ON 5 External converter control Enter selection or ESC to previous menu gt 2 Serial port 1 Handshaking CTS line property TX buffer state 2 RTS line property Flowcontrol Enter selection or ESC to previous menu gt 2 Select RTS line property RTS line property 1 Ignored 2 Flowcontrol 3 Reception control Enter selection or ESC to previous menu gt 1 Serial port 1 Handshaking CTS line property TX buffer state 2 RTS line property Ignored Enter selection or ESC to previous menu gt 7 1 6 Special functions Special functions additional set up are modified by selecting from the main menu selection 6 For further information please see the Chapters describing the said functions The current values of the parameters are displayed and can be modified in toggle type fashion by selecting the appropriate parameter selection number 61 SATELLIN E 1870 and 1870E User Guide version 4 0 Enter selection gt 6 Additional setup Toggle ON OFF values Current value shown 1 Repeater OFF 2 SL commands ON 3 D
32. N41651 16pin connector is connected to ground the radio modem is in the Programming Mode 2 1 1Pin configuration The pin configuration of the SATELLINE 1870 is defined in the following table The picture below indicates the order of the pins DIN41651 16 pin male connector of the radio modem the modem DTE connector facing the viewer 15 SATELLIN E 1870 and 1870E User Guide version 4 0 Direction IN is data from DTE Data Terminal Equipment to the radio modem Direction O UT is data from the radio modem to the DTE EXPLANATION SSS RS 232 OUT Data set ready Instruction Indicates that the radio modem is switched O N internally connected to the DTR pin Connecting a load to DSR without connecting a driving source to DTR cause the modem to enter the STBY mode UT Receive Data O utput of the data received over radio Data from the radio modem to the DTE Wu ME TD Transmit Data input of the data to be transmitted by radio Data from interface converters 14 DTR Data Terminal Ready modem active low Instruction When left unconnected the radio modem is ON weak pull up When connected to GND or SGND the radio modem will enter the Standby Mode COMMON PINS 1 3 DC DCsupplyvolage positive ____ __ 5 Donotconnect L 5 IN 5HDN jModempowerdown active low weak pull up
33. SATELLIN E 1870 does not have a CD line carrier detect For applications that require a CD signal the user can connect the CTS line from the modem to the CD line in the terminal device the CTS line property Always O N must then be selected 5 CTS line property External Converter control In some applications it is necessary to use an external protocol media converter which converts 5232 interface of the SATELLIN E 1870 to i e a 5 485 MBUS or a current loop signal These converters usually need a signal which control the operating mode of the converter transmit enable In such cases the CTS line of the modem can be used to control the operation of the external converter CTS will be active when the modem is outputting data to the RD line and inactive otherwise To take into account delays typical to external converter control lines the CTS signal will go active one RS 232 frame start bit data bits parity stop bit s before the data is sent out on the RD line CTS will also remain active one RS 232 frame after the last character has been sent out from the RD line LO O PBACK PREVENTIO N Many media converters are simple devices which convert RS 232 to a media which uses the same wires for bidirectional data transmission RS 485 for example In such cases all characters sent to the external converter from the RS232 interface usually appear as received data on the RS232 interface This would cause the modem to send all data
34. SATELLIN E 1870 and 1870E User Guide version 4 0 IMPORTANT NOTICE All rights to this manual are owned solely by SATEL Y referred to in this user guide as SATEL rights reserved The copying of this manual without the written permission from the owner by printing copying recording or by any other means or the full or partial translation of the manual to any other language including all programming languages using any electrical mechanical magnetic optical manual or other methods or devices is forbidden SATEL reserves the right to change the technical specifications or functions of its products or to discontinue the manufacture of any of its products or to discontinue the support of any of its products without any written announcement and urges its customers to ensure that the information at their disposal is valid SATEL software and programs are delivered as is The manufacturer does not grant any kind of warranty including guarantees on suitability and applicability to a certain application Under no circumstances is the manufacturer or the developer of a program responsible for any possible damages caused by the use of a program The names of the programs as well as all copyrights relating to the programs are the sole property of SATEL Any transfer licensing to a third party leasing renting transportation copying editing translating modifying into another programming language or reverse engineering for any intent
35. TELLIN E 1870 radio has a raw data rate of 9 6 kbps using 25 kHz channel spacing o SATELLIN E 1870 radio modems DTE interface is electrically compatible with the RS 232 serial interface RD TD RTS CTS DTR DSR lines are implemented o SATELLINE 1870 radio modem software can be updated through the service connector using a PC and a special programming device User guide version information User G uide version 4 is applicable for SATELLIN E 1870 having the software version 2 0 or later hardware version UCTC8L or later SATELLIN E 1870 and 1870E User Guide version 4 0 1 SATELLINE 1870 RADIO DATA MODEM 1 1 SATELLIN E 1870 Technical specifications SATELLIN E 1870 complies with the following international standards ETS 300 220 1 radio requirements EN 301 489 1 EMC requirements and EN 60950 1 electrical safety parameters are given for RADIO TRAN SC EIVER Frequency Range Channel Spacing Frequency Stability Type of Emission Communication Mode RADIO TRANSMITTER Carrier Power 1870 1870E Carrier Power Stability Adjacent Channel Power RADIO RECEIVER Sensitivity Adjacent Channel Selectivity Blocking typical MODEM Interface Interface Connector Date Speed of DTE Interface Data Speed of Radio Interface GENERAL Temperature Ranges O perating Storage Antenna Connector Housing Size H x W xD Weight O perating Voltage POWER CONSUMPTIO N room temperature 25C if not mentioned other
36. associated with the selected sub band see chapter 1 2 Display current channel s number response is nn Numbering starts 12 5 kHz from the sub band lower limit see chapter 1 2 Please note that when changing the sub band the modem will also adjust the power level and the frequency so that they comply with the limits of the selected sub band The modem automatically sets the frequency to the lowest possible frequency within the selected sub band Channel no 1 7 2 2 Extended SL commands The SL command response might sometimes be hard to find among data received from the modem To make the parsing of SL command responses easier Extended SL commands have been created Setting the extend SL command O N encapsulates the SL command response with lt STX gt SL response lt ETX lt LF gt Extended SL commands can be turned on from the programming menu or by using a SL command 7 2 3 Addressing Effect and description of command SL Set all addresses RX1 RX2 1 TX2 to value ie SL OFOF 51 1 Display both primary addresses 1 RX1 response SL T Set both transmit addresses TX1 TX2 to value xxxx SL T Display primary transmit address TX1 response xxxx SL R Set both receive addresses RX1 RX2 to value xxxx SL R Display primary receive address RX1 response SL A XXXX Set a
37. atablock CRC 16 error check OFF 4 Power save OFF 5 Radio TX priority ON 6 Limit radio frame length OFF 7 Extended SL commands OFF 8 Full frame CRC 16 error check OFF Enter selection or ESC to previous menu gt 7 1 7 Activating tests Tests can be activated by selecting main menu selection 7 Tests are activated by setting the status of the desired test to ON and will remain active until the value of the selection in the menu is returned to the value O FF Enter selection 7 Tests setup 1 Short block test OFF 2 Long block test OFF 3 Unmodulated carrier OFF Enter selection or ESC to previous menu gt 7 1 8 Restoring factory settings Factory settings can be restored by selecting option 8 from the main menu Enter lection gt 8 Restoring Restore factory settings Restore factory settings Y N is confirmed by pressing Y YES or cancelled by pressing N in the case restoring is not wanted after all Also the pressing of ESC button at any point in the procedure will return the display to the previous next higher menu level without restoring factory Settings 62 SATELLIN E 1870 and 1870E User Guide version 4 0 7 1 10 Saving modified settings into the permanent memory All modified settings must be saved into the permanent non volatile memory of the radio modem before exiting the Programming Mode Selectin
38. bes how the ERRO R code part of the ERRO R LED sequence should be interpreted BR RR error AME error Green Green G reen OFF mor 12 or RIS Rei orr jor 4 3 Programming Mode The settings of SATELLIN E 1870 are fully configurable in the Programming Mode by using a suitable terminal program The radio modem will shift into the Programming Mode by connecting the DIN41651 connector pin 7 to ground GND When using the Programming Mode the radio modem will use the serial port with settings 9600 bps N 8 1 data transfer speed 9600 bps no parity 8 data bits and 1 stop bit Programming mode be activated also by using an SL command see chapter 7 2 5 4 3 1 Changing the settings o Connectcables RS 232 cable to PC CO M port power supply cable to power supply o Switch on the PC and start the SaTerm 4 program or other terminal program o Open a terminal window and select with the right mouse button a menu and choose Prog Settings in case you are using some other terminal program set the serial port parameters as follows 9600 bit s 8 data bits no parity 1 stop bit which is always default in Programming Mode 24 SATELLIN E 1870 and 1870E User Guide version 4 0 o Connect PRO G pin to ground o Make desired changes to the settings o Save changes by pressing E in the main menu If you don t want to save cha
39. cc e 25 Aen Cm a Frequency MHz 9 898 898 v 698 Qo a The values for the sub bands in the previous table are provided here for reference only and the user is encouraged to check the latest national and European regulations concerning the frequency band used before the use of this modem 11 SATELLIN E 1870 and 1870E User Guide version 4 0 1 2 5 Channel assignment Each sub band is divided into 25 kHz channels according to a channel assignment scheme defined by the recommendation CEPT ERC REC 70 03 The channel assignment table below is calculated as follows Centre frequency of the lowest channel within a sub band sub band lower limit 12 5 kHz Centre frequency of the highest channel within a sub band sub band upper limit 12 5 kHz The table below lists the centre frequencies for each channel on each sub band Furthermore the corresponding channel numbers are shown Channel numbers are mainly used when changing channels with SL commands CHANNELS AND SUBBANDS PRE PRO GRAMMED IN SATELLINE 1870 E FOR THE 868 870 MHZ BAND M 00 6 NEN 7 25 ME 3 4 65 MEN 7 freq 868 60 868 7 869 2 869 3 869 4 869 65 869 7 870 MHz Ch no Centre freq M Hz 1 868 0125 868 6125 868 7125 869 2625 Notavailable 8 868 0625 868 6625 868 765 869 4625
40. d is connected to pin 2 of the DIN41651 16 connector The DTR line of the radio modem which is connected to pin 14 can be used as an O N STANDBY switch by which the radio modem can be switched either O N operational state or O FF STAN DBY Connecting the DTR to ground will set the modem to the STANDBY state Leaving the DTR unconnected will turn on the modem internal pull up Especially in applications where the radio modem is used as a portable device battery operated applications the DTR line pin 14 should be connected to a logical state 0 whenever it is possible to conserve battery power and prolong operational time between battery charging 67 SATELLIN E 1870 and 1870E User Guide version 4 0 9 ACCESSORIES AND ADDITIONAL EQUIPMENTS 9 1 RS Cables CRS 18F Interface cable DIN41650 16 D9f 1 5 Including power supply cables CRS 18IF Interface cable DIN41650 16 D15f 0 4m from 1870 to l or C LINK100 Note In the description m male f female connector type 9 2 RF Cables Description CRF 1 SMA Cable with SMA m TNC f connectors RG58 3 98 10 m CRF 5 SMA Cable with SMA m TNC f connectors RG58 3 dB 10 m Note In the description m male female connector type 9 3 Antenna ANTENNA 1870 Half wave antenna 9 4 Additional equipments 68 SATELLINE 1870 and 1870E User Guide version 4 0 APPENDIX A ASCII CHARACTER TABLE gt KS lt
41. d by pauses of known minimum length The address field of the message is at a known character offset from the first character of the protocol or the protocol starts with the address The message is a continuous bit stream the longest possible inter character delay is known The SATELLINE 1870 can also be configured to identify protocols which have separate start characters and address offsets for different message types two sets of parameters are available protocol 1 and protocol 2 The following table will describe the parameters which affect the protocol identification 46 SATELLIN E 1870 and 1870E User Guide version 4 0 PARAMETER FORMAT LENGHT DESCRIPTIO Pause length 1 100 equals the The user protocol should have a break a pause in data time of a transfer transmission between messages The default value for the frame on RS 232 pause is 3 bytes start bit data parity if enabled NO TE The pause length also affects the conditions of stop bit finding SL command and the conditions of ending the radio transmission This parameter should be changed to be longer than known worst case inter character delay of the used protocol but shorter than the worst case inter packet delay For example for MO DBUS RTU this should be set to 3 This parameter is common for both message types Protocol 1 ON OFF N the modem will use the parameters entered for Address from RS232 protocol 1 to find the address from the data o
42. dem 2 starts transmission Modem 3 TX start delay timer is still running SATELLIN E 1870 and 1870E User Guide version 4 0 m E c M p g g gt 1 1 1 2 2 2 m 7 DATA DATA 3 3 Modem 2 is Modem 2 Modem 3 TX start transmiting Modem transmission stops delay is reached 3 detects the Modem 3 detects that Modem 3 starts the transmission of the RF channel is free transmission modem 2 and and starts its TX start resets stops its TX start delay timer delay timer NO TE The desired TX start delay is added to minimum delay of RF transmission start approx 70 ms Thus the latency of the data transfer is increased by the entered TX delay value 5 4 Tests The radio modem can be switched to the Test Mode where it will send a test packet on the radio channel The test packet is a normal data transmission which can be used for example when directing antennas during the system installation When the test packet transmission has been switched on and saved by using the Programming Mode the transmitting radio modem needs only a power supply and an antenna The data throughput of the modem is roughly 9600 bps In test cases it is therefore recommended that the serial data speed of the receiving radio modem is set to 9600 bps or higher When either short block or long block tests are enabled and the modem is not in the programming state the modem wi
43. e easiest way to control addresses and the risk caused by interference from other systems operating in the same area is minimal Example by setting all addresses of both radio modems to a value 1234 they will accept only those messages which contain this address and they will use this same value when transmitting data If the channel is reserved for use only by a certain network or if the terminal devices are responsible for addressing it is not necessary to use addressing in the radio modems 6 3 Using repeaters and addresses in the same system In systems with several repeaters a substation and a base station addresses must be used in radio modems It is possible to realise also a system with only one repeater without addressing In such a case the base station will however hear the message both from the substation and from the repeater in other words the message is duplicated as it moves along the route 6 3 1 Repeater chain using dual addressing If the terminal devices cannot add address chains to the beginning of the data packets a network with several repeaters may still be realised by using dual addressing In dual addressing each link see arrows in the picture below is given a unique address which will prevent duplication of messages and endless loops in the network The terminal devices need not add anything to the data Usually the primary transmit address is used in transmission TX1 The secondary transmit add
44. e pause in the middle of the user data field of the user data field tip L tco eset ey P i no FD LINE DATA DATA MOD LINE DATA 1 NSD DNE DATA DATA INE DATA DATA TX TX idle TX TX idle vow TX RX TX S QR d Bos rot deleted New data is detected New data is detected transmission is started transmission 5 Symbol Description Tio Transfer delay caused by the modem Tico Inter character delay caused by the transmitting DTE Ta A time corresponding to the pause length setting of the modem Tcp The sum of inter character delay and the transfer delay NOTE This delay varies depending on handshaking error correction error checking etc Systems should not be constructed on the assumption that delays are copied form the transmitting modem to the receiving modem NOTE When using for example Microsoft Windows NT or 2000 inter character delays of over 120 ms have been measured The pause length setting is implemented in sw 1 28 and beyond In previous software versions sw 1 26 the pause length setting was labelled as a break length and it was used only if the modem was configured to read the address from the user data 5 3 3 TX delay The radio modem can be configured to delay the beginning of a radio transmission by 0 65535 ms 65 5 s This function can be used to prevent packet contention in a
45. e to the desired destination or to separate two parallel networks from each other In networks with repeaters it is usually necessary to use addresses to prevent data messages from ending up in loops formed by repeaters The enabling of any addressing function will set the modem in addressing mode In the addressing mode the modem will use a different more complicated frame structure on the radio interface This means that The latency of the modem will increase 3 4 ms the transfer time of the address fields A modem in addressing mode will receive data only from other modem in addressing mode O ther receptions will be rejected When a modem is not using addresses it will not receive data from modems that do use addresses 6 2 1 Primary and secondary transmit and receive addresses The radio modem uses separate addresses for reception and transmission These are called transmission addresses and reception addresses Furthermore the modem has two address sets primary and secondary The addresses entered to the modem by SL command or from the configuration menu are entered as 4 characters in hexadecimal format 6 2 1 1 Primary addresses Transmit When the modem receives data from the terminal interface the data is transmitted using the primary TX address When the modem is configured as a repeater all data that has been received with the primary RX address will be transmitted with the primary TX address All data originating fro
46. eached Modem 3 starts the transmission This function can be used to prevent collisions in systems where all nodes can initiate transmissions i e multimaster or distributed systems 38 Example 3 SATELLIN E 1870 and 1870E User Guide version 4 0 A system with 3 stations within the same RF coverage all stations are able to receive the other stations transmissions Each modem uses TX priority OFF each modem has TX start delayz 0 ms Modem 1 is transmitting modems 2 and 3 are receiving Example 4 Modem 1 is transmitting modems 2 and 3 are receiving The terminals of modems 2 and 3 are transmitting Modem 1 stops transmission modems 2 and 3 have equal TX start delay settings The transmissions collide in the air Modem 1 will not receive either transmission A system with 3 stations within the same RF coverage all stations are able to receive the other stations transmissions Each modem uses TX priority OFF Modem 1 start delayz 0 ms Modem 2 TX start delay x ms Modem 3 TX start delay x ms 70 ms 1 1 DATA 4 DATA 4 DATA 2 1 1 2 e B P P DATA DATA DATA Modem 1 is Modem 1 is Modem 1 Modem 2 TX start transmitting modems 2 and 3 are receiving transmitting modems 2 and 3 are receiving The terminals of modems 2 and 3 are transmitting transmission stops Modems 2 and 3 start their TX start delay timer 39 delay time is reached Mo
47. ed for a reason For example in the following cases o Continuous interference is present and the desired signal is strong In this case the RSSI threshold can be increased to prevent the modem from synchronising to the interfering signal and or possible noise o Maximum sensitivity should be achieved and the desired signal is very weak In this case the sensitivity could increase by decreasing the RSSI threshold This type of situation is usually a sign of a poorly constructed radio network contact Errors and momentary loss of signals can be expected in this kind of a situation Some data might be successfully transferred RSSI signal Received Signal Strength Indicator gives an indication of the strength of the received radio signal This signal can be used to determine the approximate signal level The RSSI is measured by the RF circuitry in the radio modem the measured voltage is then read by the controlling processor of the radio modem The software of the modem has a conversion table which is used to convert the RSSI voltage to signal strength The signal strength measured by the receiver has the following characteristics Parameter Min Max RSSI range 115dBm 40 dBm Absolute RSSI measurement error compared to absolute level Range 110 dBm 90 dBm 89 dBm 60 dBm 2 dBm 59 dBm 40 dBm 2dB 5dB error between consecutive measurements for the same modem with the same cond
48. es the status of DTE connector pin 13 RTS indicates the status of DTE connector pin 11 Special LED sequences are used when any tests are enabled or when the modem is in the error State 4 2 Self diagnostics The internal CPU of the modem monitors the operation of the radio modem The following functions are included in the modems self diagnostics RF output power control loop Status of various software processes The content of the RAM The content of the RO M Other internal functions When the self diagnostic function of the modem discovers an error in any of the above mentioned functions the modem will go to the ERROR state 23 SATELLIN E 1870 and 1870E User Guide version 4 0 In the ERRO R state the modem does not transfer data transmission and reception is disabled In the error state the LED indicators blink in the following sequence All LEDsON gt All LEDs O FF gt ERROR code gt All LEDs off This cycle repeats for approximately 10 seconds and is then followed by a reset If the error was of a momentary nature for example caused by some external interference power dips lightning etc the modem will return to its power on state If the error was caused by a permanent fault in the modem or a permanent fault in the surrounding conditions erroneous supply voltage continuous external transients etc the modem will most likely return to the same error state after the reset The following table descri
49. g option E from the main menu will cause the settings to be saved Enter selection Configuration saved Please turn off program mode switch NO TE To switch the radio modem back into DATA mode from the Programming Mode the PRG pin of the DIN41651 connector pin 7 must be disconnected from ground GND or SGND 7 2 Changing parameters using the SL COMMANDS The controlling terminal device can change the configuration settings of a radio modem This is accomplished with the help of SL commands which can be used during data transfer SL commands can be used to change e g the frequency or addresses It is also possible to interrogate a radio modem in order to gain information concerning current settings that are in use The terminal device is either a PC or a programmable logic PLC together with suitable terminal program SL commands must be enabled using Programming ode before they can be used SL command is a one continuous string of characters which is separated from other data by pauses that are at least three 3 characters long No extra characters are allowed at the end of SL command Serial interface settings are the same as in data transfer and 12 of the serial connector MUST NOT be connected to ground GND SL command is properly recognised also in the case when the command string is terminated in lt CR ASCII character no 13 Carriage Return 0x0d or CR LF
50. gardless of which character length 10 11 or 12 is used on the terminal interface Start Data Parity Stop Asynchronous character data format Example With an 8 bit data character length and taking for example a decimal value of 204 which corresponds to a binary value of 11001100 and with a start bit value of 0 parity bit set to either NO NONE 0 or 1 and with a stop bit value of 1 the possible combinations are listed in the table below 8 bit no parity 2 stop bits 01100110011 11 bit 8 bit even parity 2 stop bits 011001100011 12 bit 8 bit odd parity 2 stop bits 011001100111 12 bit If the settings of data speed character length parity or the number of stop bits differ between the radio modem and the terminal errors will be introduced into the transferred data The serial port settings of each individual radio modem in a system can be different The serial port settings can be changed in the Programming Mode 26 SATELLIN E 1870 and 1870E User Guide version 4 0 5 2 Handshake lines When using the RS 232 serial interface handshake signals can be used to control the data transfer Handshake signals are used for example by the radio modem to inform the terminal that the radio channel is busy and that it cannot initiate transmission The terminal can also control the radio modem via the RTS line A common way of using handshake signals is to monitor the CTS line and ignore the othe
51. gs will remain active 25 SATELLIN E 1870 and 1870E User Guide version 4 0 5 TRANSPARENT DATA TRANSMISSIO N 5 1 Serial interface data format The SATELLIN E 1870 radio modem serial interfaces use asynchronous data format No external synchronising signal is needed since necessary timing information is acquired from the start and Stop bits transmitted before and after each data byte The data transfer speed of the serial interfaces can be set to 300 600 1200 2400 4800 9600 or 19200 bps bits per second The length of the data field must be 7 or 8 bits A parity bit may also be used The number of stop bits can be selected 1 or 2 bits O ne character to be transmitted will thus contain a start bit the data bits which define the actual character in question an optional parity bit and one or two stop bits The overall length of one character is therefore 10 11 or 12 bits This should be taken into account when calculating the data throughput capability of a system In other words also the number of start stop and parity bits must be considered A useful rule of thumb is that at a data transfer speed of 9600 bps the transmission of one character will require roughly one millisecond 1 ms NO TE On the radio interface the radio modem uses a synchronous transfer method The overhead of the coding etc used on the radio interface is approximately 20 96 Thus the user gets the same transfer speed on the radio interface re
52. he time for the transfer of 1 byte on the serial line including the start stop and possible parity bits for example 9600 bps no parity 8 data bits 1 stop bit 10 bits 1 04 ms 9600 bps even parity 8 data bits 1 stop bit 11 bits 2 1 146 ms The following example shows how the modem behaves when detecting a pause and how to correct the problems cause by non real time operating systems Definitions Inter character delay The amount of time from the stop bit from the previous byte to the start bit of the next byte on an asynchronous transfer line ie RS 232 Transfer delay latency The transfer delay caused by the modem from the start bit of the first byte on the TD line of the transmitting modem to the start bit of the first byte on the RD line of the receiving modem The following table demonstrates the affect of the pause length setting to the modem operation when there is a pause in the middle of the user data transmission Notice how the data is split into two separate RF transmissions if the pause length setting is shorter than the maximum pause inter character delay of the transmitting DTE 39 SATELLIN E 1870 and 1870E User Guide version 4 0 The pause length defined by The pause length defined by the pause length setting the pause length setting lt gt the pause in the middle th
53. he transmit power and transmitter duty cycle used 1 2 1 Usage Most sub bands are assigned for SRD applications such as Telemetry Telecommand and Telecontrol Alarms Some sub bands are reserved solely for alarm systems The intended usage SRD Alarms for each sub band is indicated in the table below 1 2 2 Sub bands Each sub band is defined by a start and stop frequency Furthermore the maximum allowed power level and maximum duty cycle is defined separately for each sub band 1 2 3 Duty cycle The purpose of the duty cycle limit is to ensure that no single application can occupy this license free band for more than a certain percentage of time The term duty cycle defines the percentage of a 1 hour period a single modem is allowed to transmit The duty cycle limitation is to be controlled by the terminal equipment connected to the modem The modem does not limit the duty cycle 1 2 4 Power level The power level limit is defined separately for each sub band The maximum power limit for each sub band is pre programmed into the SATELLIN E 1870 The user can choose from 5 10 25 50 100 and 500 mW ERP output power No matter what power level the user has chosen the maximum allowed power level of the chosen sub band cannot be exceeded ERP The effective radiated power from the antenna relative to a half wave dipole in a certain direction 10 SATELLIN E 1870 and 1870E User G uide version 4 0 Maximum Power ERP mW 5
54. ial port settings will remain as those defined previously when the radio modem was in Programming M ode 7 1 Changing parameters using a terminal device The serial port of the radio modem is connected to a terminal device or a PC which emulates a terminal this can be accomplished by using a suitable program such as the SaTerm 4 program or the Windows Hyper Terminal program Check the wiring of the serial port connection cable Terminal device serial port settings must be set to 9600 bps N 8 1 data transfer speed 9600 bps no parity data length 8 bits and one 1 stop bit MODE pin pin 7 of the DIN41651 connector of the radio modem is then connected to ground GND Following this the radio modem will transmit the following message to the terminal certain configuration settings might differ from the ones shown SATEL SATELLINE 1870E SW Version x y z HW Version uCTC8L a0 Serial no 0123456789 1 Radio frequency 869 4125 MHz Band 6 869 4000 869 6500 500 mW 2 Radio settings TX power 500 mW RSSI threshold 113 dBm TX delay 0 ms 3 Addressing RX address OFF 0000 0000 TX address OFF 0000 0000 Protocol 1 OFF Start char 00 Offset 0 1 BYTE Protocol 2 OFF Start char 00 Offset 0 1 BYTE Hop count 15 TX address bitmapping OFF RX address masking OFF Repeater address bypassing OFF Subnet mask 1 0000 Subnet mask 2 0000 4 Serial port 9600 bit s 8 bit data None parity 1 stop bit
55. ill ensures error free connections under variable conditions Large output power levels using short connection distances can in the worst case cause disturbances to the overall operation of the System 250 mW only 1870E 500 mW only 1870E Possible output power settings of the SATELLIN E 1870 radio modem NO TE Setting the radio data modem output power level to levels exceeding regulations set forth by local authorities is strictly forbidden The setting and or the use of non approved power levels may lead to prosecution SATEL is not responsible for any illegal use of its radio equipment and is not responsible in any way for any claims or penalties arising from the operation of its radio equipment in ways contradictory to local regulations and or requirements and or laws 18 SATELLIN E 1870 and 1870E User Guide version 4 0 3 2 Receiver The Signal Threshold Level setting of the receiver determines a level above which the search for the actual data transfer signal is active It is usually recommendable to use a value of 113 dBm If the Signal Threshold Level setting is set too low the CD LED is constantly ON orange it is possible that the receiver is trying to synchronise itself with noise In this case the actual data transmission might remain undetected If the RSSI threshold is set too high weak data transmissions will be rejected although they would be otherwise acceptable The RSSI threshold should only be chang
56. is recommended to use FULL FRAME CRC 16 error check this mode will strip the inter character delays from the data stream which the receiving modem sends to the DTE port However the added latency needs to be encountered for in the parameters of the MO DBUS master communication parameters 21 SATELLIN E 1870 and 1870E User Guide version 4 0 3 5 Limit radio frame length Normally the length of a single transmission is not limited by the modem In normal operation a transmission is ended when o The TX buffer is empty and a Brake normally 3 RS 232 data bytes on the RS 232 TD line has been detected o The buffer overflows In theory when using 19200 or 9600 transfer speed the transmission can be of infinite length The probability of such a situation increases if hardware handshaking is used The frame synchronisation sequence and the frame identifiers frame type addresses etc are transmitted only in the beginning of each frame each radio transmission These signals might seem redundant to the user but they are necessary for the receiver to be able to receive the transmitted frame Thus if the receiver momentarily looses the reception of the transmitted frame it will not be able to synchronise to the same frame again The receiver will stop reception and start looking for the beginning of the next frame which in theory then might never come To overcome this problem the modem is fitted with the limit radio frame length setting
57. itions Relative RSSI measurement error dB mE RSSI accuracy given for temperature 25 C RSSI can be read by using SL commands see chapter 7 2 4 19 SATELLIN E 1870 and 1870E User Guide version 4 0 3 3 TX Priority ON OFF SATELLIN E 1870 includes a TX Priority setting which is used to select the priority between reception and transmission The setting can be changed in Programming Mode By default transmission has higher priority than reception i e the default value is TX Priority O N TX priority ON means that a terminal device attached to a radio modem determines the timing of the transmission The transmitter is switched on immediately when the terminal device is starting to output data to the modem If the radio is receiving data from the radio interface when data is detected on the TD line the radio modem will stop reception and turn to the transmit state TX priority O FF means that a radio modem will not transmit unless the radio channel is free If the radio channel is occupied when the DTE transmits data the data will be buffered and transmitted when the radio channel is free This will cause timing jitter to the system as the moment of transmission start is not solely depending on the transmitted data However it will decrease the probability of collisions in the air To toggle the Priority setting in the programming menu choose selection 6 6 Additional setup 5 TX priority ON OFF Default se
58. ll addresses in the following order RX1 RX2 TX1 TX2 SL A Display all addresses in the following order RX1 RX2 TX1 TX2 response XXXX XXXX address in hexadecimal format 0000 FFFF Entering 0000 for a received address will cause the modem to disregard the address In this case the modem will receive all addressed transmission with ANY address For further information please see chapter 6 2 Addressing 64 SATELLIN E 1870 and 1870E User Guide version 4 0 7 2 4 Radio parameters Effect and description of command Display field strength measured during last message frame response is dBm The measured value is cleared 10s after reception has ended After the clear timeout the response will be 255 dBm to indicate that no valid measurement has been done for 105 Displays the field strength of the carrier present when the RSSI was last measured A SL query sent to the modem when the modem is transmitting will result in an answer 255 dBm to indicate that the measurement can not be completed atthe given time Set the RF output power where is the decimal value of the intended power in milliwatts If the given value does not correspond to one of the programmed power levels the output power is rounded to the nearest possible value SL P Display the RF output power response is mW SL T Set the minimum power level of the signal
59. ll run a special LED sequence to show that the modem is performing a test The sequence is RTS CTS TD RD TD CTS RTS CTS etc The speed of the LED sequence is coded as follows Long block test slow cycle Short block test fast cycle 40 SATELLIN E 1870 and 1870E User Guide version 4 0 The modem has three test modes 5 4 1 Short block test A single test string is sent followed by a 100 ms delay after which the following test string is sent etc 5 4 2 Long block test Test strings are sent continuously for approximately 50 s followed by a 10 s delay after which the following 50 s transmission is started etc 5 4 3 Carrier test The modem will send an un modulated carrier on the desired frequency and the set output power The carrier will remain the entire duration of the test This modem can be enabled either from the programming menu or using SL commands see chapter on SL commands This test is intended for type approval and conformance measurement purposes 5 4 4 SATELLIN E 1870 test string The SATELLIN E 1870 uses a test string which is constructed to serve two main purposes 1 A user can monitor the quality of the received data by visually inspecting the received data stream the packet number helps to keep track of lost messages 2 A program may be constructed to read the received test strings and to calculate BER PER Bit Error Rate Packet Error Rate which can be used to evaluate the perfo
60. m the local modem terminal port will also be transmitted using the primary transmit address 43 SATELLIN E 1870 and 1870E User Guide version 4 0 Receive The modem receives all data using the primary receive address as a filter All received air interface frames which have an address matching the primary receive address of the modem will be received Entering FFFF as a receive address will cause the modem to receive ALL frames from the air interface that are sent in the addressing mode When the modem is configured as a repeater all air interface frames matching the programmed primary receive address will be received The received data will then be Transmitted to the terminal interface of the modem Stored in the receive buffer waiting for transmission to start 6 2 1 2 Secondary addresses Receive All air interface frames matching the programmed secondary receive address will be received The received data will then be Transmitted to the terminal interface of the modem Stored in the receive buffer waiting for transmission to start Transmit When the modem is configured as a repeater any data received and stored on the secondary receive address will be transmitted using the secondary transmit address once the reception has ended Secondary transmit address is only used in repeater applications If only one address pair is needed in a network both addresses must be set the same TX1 TX2 and RX1 RX2
61. modems group poll in the air Modem 1 2 and 3 to answer will not receive either data correctly 37 Example 2 SATELLIN E 1870 and 1870E User Guide version 4 0 A system with 3 stations within the same RF coverage all stations are able to receive the other stations transmissions Each modem uses TX priority ON Modem 1 start delayz 0 ms Modem 2 TXstart delayz 60 ms Modem 3 TX start delay 120 ms DATA 1 DATA 4 DATA 2 5 5 DATA DATA 3 Modem 1 is Modem 1 Modems 2 and 3 transmitting i e sending a group poll requiring the terminals connected to modems 2 and 3 to answer E BE e vv M 57 o 18 DATA Modem 2 TX delay timer reaches the set value Modem 2 will start transmission Modem 3 is still waiting for its TX delay timer to reach the set value transmission stops The terminals connected to modems 2 and 3 answers the group poll b 3 Modem 2 transmission stops Modem 3 waits for its TX delay timer to reach the set value RX delay when using TX priority O FF The TX delay counter is started when the modem receives a byte from the radio modem The timer will be reset and stopped if the RF channel is occupied The timer will start again when the RF channel is free start their TX delay timer 1 c 1 2 7 DATA Modem 3 TX start delay is r
62. n the DTE protocol port FF the modem will not use the parameters for protocol 1 Protocol 1 ON OFF N the modem will use the parameters entered for Address from RS232 protocol 2 to find the address from the data on the DTE protocol port FF the modem will not use the parameters for protocol 2 Start character HEX 8 bits The protocol should have a constant start character protocol 1 2 Entering HEX 2A as a start character will cause the modem to interpret any character preceded by a break length as a start character Address offset BCD 0 15 Defines the distance offset from the start character to the protocol 1 2 first byte of the address field Entering 0 as address offset will cause the modem to use the start character as the first byte of the address field Length of address field ASCII addresses Address consists of ASCII numbers of various predefined protocol 1 2 lengths The numerical value represented by the ASCII characters is converted to a 16 bit BCD code The corresponding BCD code should be entered in HEX format into the receiving radio modem as the RX address 1 1 BYTE ASCII ASCII 1 is transmitted using TX address 0001h ASCII 2 is transmitted using TX address 0002h ASCII 9 is transmitted using TX address 0009h 2 2 BYTE ASCII ASCII 01 is transmitted using TX address 0001h ASCII 10 is transmitted using TX address 000Ah ASCII 99 is transmitted using TX address 0063h BECIE
63. nges press Q o Disconnect PRO G pin from ground the radio modem will now reset the internal CPU and return to the Data Transfer Mode with the programmed settings SATEL SATELLINE lt 1870 E SW Version x yz HW Version uCTC8G 0 Serial no 0123456789 1 Radio frequency 869 4125 MHz Band 6 869 4000 869 6500 500 mW 2 Radio settings TX power 500 mW RSSI threshold 113 dBm TX delay 0 ms 3 Addressing RX address ON 0000 0000 TX address OFF 0000 0000 Protocol 1 OFF Start char 00 Offset 0 1 BYTE Protocol 2 OFF Start char 00 Offset 0 1 BYTE Hop count 15 TX address bitmapping OFF RX address masking OFF Repeater address bypassing OFF Subnet mask 1 0000 Subnet mask 2 0000 4 Serial port 9600 bit s 8 bit data None parity 1 stop bit Pause length 3 5 Handshaking CTS Clear to send RTS Ignored 6 Additional setup Repeater OFF SL ON Block CRC OFF TX priority ON Power save OFF Frame limit OFF SL Extended ON Full frame CRC OFF 7 Tests Test mode Inactive 8 Restore factory settings E EXIT and save settings Q QUIT without saving Enter selection 4 3 2 Restoring factory settings By selecting menu selection 8 itis possible to restore the factory settings Restore factory settings Restore factory settings Y N The factory settings are restored by selecting Y YES By pressing any other button the current settin
64. on 4 0 PRO DUCT CONFORMITY Hereby SATEL declares that 1870 radio modem is in compliance with the essential requirements and other relevant provisions of Directive 1999 5 EC Therefore the equipment is labelled with the following CE marking 0523 DECLARATION of CONFORMITY In Accordance with 1999 5 EC Directive of the European Parliament and of the Council of 9 March 1999 on radio equipment and telecommunications terminal equipment and the mutual recognition of their conformity Doc No SATEL DC RTTE 067 Manufacturer SATEL Oy Address P O Box 142 Meriniitynkatu 17 24101 Salo Finland Producis Type Model SATEL 1 SATELLINE 1870E Radio Modem SATELLINE 1870 SATELLINE 1870 Radio Modem Notified Body Opinion according 1o Document Nr Issued by Doted On Notified Body Annex IV of R amp TTE Directive FI08700004 Finnish Communications Regulatory Authority 7 of March 2008 Nr 0523 We the manvfocturer of the above mentioned products hereby declare that these products conform to the essential requirements of the European Union directive 1999 5 EC This Declaration of Conformity is based on the following documents TEST LABORATORY Doc No of Product TestSpecification Dote of Issue 80599 SATEL TA1 EN 300 220 3 and 14 03 2007 NEMKO Espoo Finland EN 300 220 2 80601 SATEL EN 301 489 1 ond 27 03 2007 NEMKO Espoo Finland EN 301 489 3 806018 SATEL
65. ransfer speeds If the terminal device transmits data to a radio modem in receive mode the data will go into the transmit buffer memory Depending on the TX priority setting the modem will do one of the following a TX priority immediately start transmitting the data sent by the DTE or 29 SATELLIN E 1870 and 1870E User Guide version 4 0 b TX priority O FF continue in receive mode and buffer the data sent by the DTE The buffered data will be transmitted when the radio channel is free when the modem is not in the receive state 5 3 2 Pause length The modem recognises a pause on the serial line a pause is defined as a time with no state changes on the RS 232 interface TD line The pause detection is used as criteria for a End of radio transmission in transmitting modem When the transmit buffer is empty and a break is detected the modem stops the transmission and will then change the radio to the receive mode b SL command recognition For a SL command to be valid a pause must be detected before the actual SL character string C User address recognition In order for the start character to be detected a pause must precede it in transmission Traditionally in asynchronous data communication pauses have been used as means to separate serial messages from each other However the use of non real time operating systems frequently used on PC type hardware has changed this tradition by adding random pauses in
66. ress TX2 is used only if the Repeater Mode is used and the packet to be repeated was received using the secondary reception address RX2 In the following example two repeaters are used It should be noted that each link arrow might be uniquely defined with the help of radio modem numbers and data transfer directions The Repeater Mode should be switched O N only in the radio modems acting as repeaters to prevent the packets from remaining in endless loops in the network Repeaters may also act as ordinary substations in that case the terminal device must wait until the message has reached the end of the repeater chain before sending data 50 Addresses TX1 RX1 TX2 RX2 Modem 1 master xd xd 12 21 12 21 SATELLINE 1870 and 1870E User Guide version 4 0 Modem 4 Modem 2 Modem 3 repeater repeater 21 32 23 ae 34 12 23 43 34 43 34 txd 6 3 2 Parallel repeater chains using dual addressin Multiple parallel repeater chains can be created in the same manner as a single repeater chain in the previous chapter This requires the use of dual addressing and the user must be able to change the primary TX address as follows Addresses Modem 1 master Modem 2 repeater Modem 3 repeater Modem 4 Furthermore if the user s protocol can distinguish messages originating from various sources addresses
67. rity Limit radio frame length O FF Connect the power cables Vb and GND to a power supply with an output voltage of 8 30 Vdc and with a minimum output current large enough to provide power for the chosen output power and voltage When creating a test connection you can use the SaTerm 4 terminal program available for free from authorised SATEL dealers or directly from SATEL Customer Support You can also use the HyperTerminal program which is included in most Windows based operating system packages or almost any other terminal program Basic settings for the serial port of the host computer when using a terminal program to communicate with SATEL radio modems are as follows CO M1 9600 bps 8 bit data none parity 1 stop bit If the serial port designated as CO 1 the host computer is reserved any other free serial port in the host computer can be used with the settings listed NO TE Please note that the Programming mode of the radio modem always uses the following communication parameters 9600 bps no parity 1 stop bit 13 SATELLIN E 1870 and 1870E User Guide version 4 0 The basic connection between a radio modem and the serial port 1 RS 232 of a PC is described in the schematic below 9 PIN D CONN 25 PIN D CONN RADIOMODEM TD 2 RD 5 SGND NOTE The modem has an internal fuse no external fuse is required except in vehicular use see section 1 3 1 1 3 1 Mounting in
68. rmance of the radio modem after installation The test string forms a simple protocol which uses the following data fields in the indicated order S lt identifier gt lt null gt lt packet number gt RX1 lt RX1 address gt S N lt serial number text string CRC16 lt CR gt lt LF gt Example string test1870 0 00005 RX1 0000 S N 0123456789 This is the test line of Satelline 1870 099D NOTE The CRC used is calculated from the first character to the preceding the CRC 5 4 5 Monitoring the test transmission using the receiver The signal strength of the received test signal can be monitored using a specific SL command SL R please ensure that SL commands are enabled Error free reception of data can be checked using a suitable terminal program 41 SATELLIN E 1870 and 1870E User Guide version 4 0 6 REPEATER MODE AND ADDRESSING Repeaters and addressing may be used to extend the coverage area of a radio modem network and to direct messages only to selected radio modems in the network 6 1 Repeater In cases where it is necessary to extend the coverage area of a radio modem network SATELLIN E 1870 radio modems can be used as repeater stations The repeater function of SATELLIN E 1870 operates a store and forward fashion This means that a modem acting as a repeater will receive data from the radio interface buffer the received data max 1 kB and then when reception stops the modem will
69. rs Usually the terminal is fast enough to handle the data received by the radio modem so the use of RTS line is not necessary Handshaking is not needed if the system protocol is designed to prevent collisions data contention by the use of polling or if the probability of collisions is small and the data loss caused by a possible collision does not cause harm to the operation of the system to which the modems are connected 5 2 1 CTS line The CTS line has a set of user selectable modes 1 CTS line property Clear To Send CTS is normally active CTS is inactive when a The modem is receiving data from the radio interface b The modem transmit buffer is about to overflow which happens mainly when the DTE data speed is higher than the speed of the radio interface 2 CTS line property TX buffer state CTS is normally active and inactive only when a The modem transmit buffer is about to overflow which happens mainly when the DTE data speed is higher than the speed of the radio interface 3 CTS line property RSSI threshold CTS is normally active and inactive only when a The modem is receiving data from the radio interface b The modem transmit buffer is about to overflow which happens mainly when the DTE data speed is higher than the speed of the radio interface The measured RSSI value is higher than the set RSSI threshold 27 SATELLIN E 1870 and 1870E User Guide version 4 0 4 CTS line property Always ON The
70. s time of 200ms is recommended When using industrial protocols like the ones listed in the table before the idea is to configure the modem connected to the master of the bus to fetch the address from the protocol The slaves usually do not have addresses in their responses thus the modems connected to the slaves should be configured differently with all responses directed to the master When using this function in conjunction with masking medium size star topology networks can be constructed Contact SATEL technical support in order to get more information For networks which have more than one consecutive repeater repeater chains additional features have to be used please consult your local distributor or SATEL technical support for the construction of more complicated network topologies 48 SATELLIN E 1870 and 1870E User Guide version 4 0 6 2 3 Hop Count Time to Live TTL When using addressing the modem always include a hop count field in the radio transmission The basic ides of the hop count feature is to ensure that a telegram can not end up in an infinite loop The value of the hop count field is statically set by each transmitting modem in the programming mode When a repeater receives a radio transmission it automatically checks the address and the hop count of the telegram If the address is correct the message is passed on the DTE and to the transmitting part of the repeater If the TTL of the received message
71. state where it can either start receiving or sending 5 3 Timing and delays during data transmission When using a radio modem for data transmission certain delays will be formed due to the use of a radio interface and from the radio modem circuitry itself These delays are formed when the radio modem switches from Standby Mode to Data Transfer Mode and during reception and transmission of data 5 3 1 Data buffering in the radio data modem Whenever the radio modem is in Data Transfer Mode it monitors both the radio channel and the serial interface At the beginning of each transmission a synchronisation signal is transmitted and this signal is detected by the receiving radio modem which then switches into receive mode During the transmission of the synchronisation signal the radio modem buffers data into its memory Transmission ends when the transmission buffer is empty and a pause is detected in the data sent by the terminal device When the serial interface speed is slower than the throughput of the radio interface the internal transmit buffer memory cannot overflow The maximum size of the transmit buffer memory is one kilobyte 1 kB If the terminal device does not follow the status of the CTS line and transmits too much data to the radio modem the buffer overflow upon which will be emptied and the transmission is restarted In the receive mode the buffer works principally in the above described way thus evening out differences in data t
72. system where all substations would otherwise answer a poll of a base station simultaneously During this delay data sent by the terminal device to the modem is buffered If this function is not needed the delay time should be setto 0 ms 36 SATELLIN E 1870 and 1870E User Guide version 4 0 NO TE The TX delay resolution is 5 ms the configuration software always rounds the entered value to the closest lower multiple of 5 For example 333 ms in converted to 330 ms 336 ms is converted to 335 ms TX delay when using TX priority ON The TX delay counter is started when the modem receives a byte from the radio modem Transmission will start when the timer has reached the set value Any data transmitted by the DTE to the modem will be buffered while the TX delay counter is counting The modem will not receive any data from the air interface while the TX delay timer is counting Example 1 A system with 3 stations within the same RF coverage all stations are able to receive the other stations transmissions Each modem uses TX priority each modem has TX start delayz 0 ms gt L d gt v p DATA Y T 1 DATA 1 DATA 2 2 2 DATA DATA 3 3 Modem 1 is Modem 1 transmission Modems 2 and 3 transmitting i e stops The terminals transmit sending a group poll connected to modems simultaneously The requiring the terminals 2 and 3 answers the transmissions collide connected to
73. the asynchronous data stream In practice these pauses are caused by the non real time operating systems which cannot service the hardware UART properly when performing other tasks other applications or tasks of the operating system itself The pauses described above are typically beyond 100 ms If such a pause happens to occur in the middle of a user message the radio modem transmits the message as two separate radio transmissions This will cause problems in at least two ways 1 The inter character delay will increase by at least the time of the modem transfer delay 2 The probability of collisions on the radio path will increase when using TX priority This will be especially harmful for repeater chains The following examples demonstrates how the pauses will effect the inter character delay All modems have priority O FF and TX delay 0 30 SATELLIN E 1870 and 1870E User Guide version 4 0 Example 1 Two modems TX priority O FF Pause Length 3 Application ie PPP communication q DATA part 1 J K K t DATA2 Ds 4 2 2 j DATA 1 DATA2 1 1 4 DATA pat2 The DTE of modem 1 The DTE of modem 1 The DTE of modem 2 Modem 2 is still starts to transmit a makes pauses the a message This transmitting Modem 1 serial message Modem 1 is trans mitting modem 2 is receiving serial stream the pa
74. to be received Signal Threshold level where xxx is a decimal value of the new intended level in dBm The range on the RSSI value is 120 dBm to 40 SL T Display the current Signal Threshold Level response is x xx dBm Note that when changing sub bands the power level is adjusted so that it does not violate the maximum output power for the selected sub band If the modem has lower power level because of a sub band change it will remain unchanged even if the sub band change would be reversed 65 SATELLIN E 1870 and 1870E User Guide version 4 0 7 2 5 Other functions Effect and description of command Save current settings as permanent settings SL V Show software revision information response is Vn nn SLYN Shows the device serial number response i e 0123456789 SL S Shows the device software version response i e 2 04 SL96H Shows the device HW version response is i e uctc8L c0 SL D Shows the device family name response is one of the following SATELLIN E 1870 SATELLIN E 1870 0 EM SATELLIN E 1870E or SATELLIN E 1870E O SL P 1 Sets the modem into the configuration programming mode Can be viewed as a virtual grounding of the M O DE pin The menu can be accessed using this command To return to normal modem operation choose either Save and Exit or Q uit The new settings if changed and saved enter into force when the modem restarts after saving the se
75. tting Modem 2 will start repeating the entire message received from modem 1 data partl and part2 Modem 3 receives the repeated message The DTE 3 will not experience delay between DATA partl and DATA part 2 34 SATELLIN E 1870 and 1870E User Guide version 4 0 NO TE Itis not always obvious to the user what type of operating system the terminal device is using Many modern devices ie manufacturing or measuring equipment use Microsoft Windows though the user is often not aware of this NO As the pause is used as a criteria for stopping the transmission setting the pause length to ie 100 ms will cause the transmitter to be active also 100 ms after the data has already been sent If this is not acceptable then a TX delay setting must be used to control each string so that it will end up in the same frame Using TX delay is however dependent on the length of the string used If various string lengths are used the TX delay has to be set according to the longest string Using TX delay will also add latency to the data transmission Using pause length will not add latency but will add time to the round trip delay this is due to the fact that the radio channel is occupied for the time of the pause length after each transmission the time it takes to detect a pause Adjusting the pause length The pause length can be adjusted from the programming menu the parameter can have any value between 1 and 255 where 1 t
76. tting is ON 3 4 Error checking To prevent erroneous data from entering the DTE the modem has two error checking modes Datablock CRC 16 error check Full frame CRC 16 error check These two modes are alternatives only one mode can be while both modes can be OFF Function principle A single radio transmission consists of one frame which consists of multiple data transfer units DTU of arbitrary length 1 127 bytes Each DTU is assigned a 16 bit checksum The receiver will receive each DTU after which the checksum is calculated for the data content of the received DTU The calculated checksum is compared to the received checksum Depending on the setting Error check ON O FF the receiver will do one of the following described in the following table 20 SATELLIN E 1870 and 1870E User Guide version 4 0 ERROR CHECK MODE ACTION Data block CRC 16 Each received DTU is held in a separate receive buffer until it is error check ON successfully checked for errors An error free DTU is transmitted to the DTE interface Full frame CRC 16 Erroneous DTUs will be rejected error check OFF The detection of an error halts the reception This method of error detection adds latency to the data In the worst case the latency is 128 ms When an error is detected the reception will be interrupted until a new transmission is detected Data block CRC 16 The content of the entire frame is held in a separate receive buffer error check OFF
77. ttings When exiting or quitting the modem will restart with the saved settings Save Exit or with the settings it had last time it started Q uit Any changes made using SL commands prior to entering the programming mode that are not saved using the SL commands are not saved The serial parameters that are used when entering 61 1 command are used also in the configuration programming mode When entering the programming menu using this command there is a timeout of approx 1minute after which the programming mode will be terminated This is to ensure that accidental entry of this modem will not jam the modem indefinitely This function can only be used it extended SL commands are enabled SL E n N 1 extended SL commands ON All return messages responding to SL commands are capsulated lt STX SL response lt gt lt LF gt 0 extended SL commands FF SL command returns are not capsulated Some SL command i e SL P works only if extended SL commands are ON SL E Shows the status of the Extended SL commands setting responses are ON or O FF SLT 1 carrier testis 1 carrier test is FF Requires Extended SL commands ON 66 SATELLIN E 1870 and 1870E User Guide version 4 0 8 POWER SUPPLY The allowed operating voltage is 8 30 Vdc The pin 1 of the DIN41651 16 connector is connected to the positive power supply line N egative power supply line groun
78. ues of the parameters are displayed and changed in toggle type fashion by selecting the appropriate parameter selection number from the list displayed The next menu level will then enable the modification of the values within allowed limits Modification of all other primary and secondary transmitter and receiver addresses is done in similar way Enter selection gt 3 Addressing setup Toggle ON OFF values Current value shown 1 RX address OFF 2 TX address OFF 3 Change primary RX address 0000 4 Change primary TX address 0000 5 Change secondary RX address 0000 6 Change secondary TX address 0000 7 protocol 1 Address from RS 232 user protocol OFF 8 protocol 1 Start char of HEX 5 po 1 9 protocol 1 Address offset of user protocol 0 A protocol 1 Type of address field 1 BYTE B Hop count Time To Live 15 C protocol 2 Address from RS 232 user protocol OFF D protocol 2 Start char of HEX ASCII Lad E protocol 2 Address offset of user protocol 0 F protocol 2 Type of address field 1 BYTE G TX address bitmapping OFF H RX address masking OFF I Repeater address bypassing OFF J Subnet mask 1 0000 K Subnet mask 2 0000 Enter selection or ESC to previous menu gt Enter selection or ESC to previous menu gt 1 57 SATELLIN E 1870 and 1870E User Guide version 4 0 Addressing setup Toggle ON OFF values Current value shown
79. until it is successfully checked for errors An error free frame is transmitted to the DTE interface Full frame CRC 16 Erroneous frames will be rejected error check ON The detection of an error halts the reception This method of error detection adds latency to the data The added latency is proportional to the length of the frame If the transmitting modems transmit a consecutive sting of data containing 200 characters 9600 bps the added latency will be 200 ms When using terminal speeds 4800 or less the proportion of added latency will become somewhat distorted but a good approximation is that the added latency is equal to the length in time of the transmitted data string Data block CRC 16 Each received DTU is directly transmitted to the DTE interface and error check OFF error checking is done when the checksum for the received DTU is received If the checksum comparison detects an error the Full frame CRC 16 erroneous data might already have been transmitted further to the error check O FF DTE and can thus not be stopped The detection of an error halts the reception this is done to prevent further erroneous data from reaching the DTE Switching the error checking O N in the Programming Mode choose selection 6 6 Additional setup 3 Datablock CRC 16 Error check ON OFF 8 Full frame CRC Error check ON OFF When using industrial protocols like MO DBUS RTU which are sensitive to inter character delay it
80. use is the pause length setting might be a reply to the partial received message ACK NACK response or other transmission is receiving Atthe same time the DTE of modem 1 will start transmitting the second part of the message DATA part Modem 1 cannot start the RF transmission because the RF channel is busy Modem 1 will stop transmitting when a pause is detected and the TX buffer is empty N Modem 2 will detect that the radio channel is free and starts trans mitting modem 1 receives the transmission DATA part 2 Modem 2 transmission stops Modem 1 will detect that the channel is free Modem 1 starts transmission of the buffered second part of the serial message DATA part 2 Modem 2 will receive the transmission The DTE connected to modem 2 will receive both parts of the DATA message however there will be a significant delay between part 1 and part 2 The delay will be caused by 1 DATA 2 transfer time 2 Modem transfer delay If data 2 is 50 characters and the serial parameters are 9600 8 N 1 the delay will be approximately 70 704 502 190 ms 31 SATELLIN E 1870 and 1870E Example 2 Two modems TX priority O FF Pause Length 120 Application ie PPP communication User Guide version 4 0 DATA part 1 2 DATA part 1 1 7 4 pause i E 1 DATA2
81. ust always be switched O FF before connecting or disconnecting the serial connection cable It should be ascertained that different devices used have the same ground potential Before connecting any power cables the output voltage of the power supply should be checked o 115 possible to connect the device to an outdoor antenna or a cable distribution system In these cases in order to conduct the possible over voltages due to lightings to earth the equipment should be connected to protective earth by using the mounting screws of the device o This is a requirement in order to be in compliance with the electrical safety regulations EN 60950 1 SATELLIN E 1870 and 1870E User Guide version 4 0 TABLE OF CONTENTS IMPORIANTUINO TIGE onde siste a a bl 1 RESTRICTIONS ON USE ci aeo er E ne 2 PRODUCT CONFORMITY aeree 3 WARRANTY AND SAFETY 5 22 2 2 24 2 4 TABLE OF CONTENTS croson 5 INTRODUCTION ee 8 1 SATELLIN E 1870 RADIO DATA MODEM 9 1 1 SATELLIN E 1870 Technical 5 9 1 2 General information on the 868 870 MHz SRD band 10 15221 Meade oeste seco vo ee tas et e eere LL E 10 15222 v S BsbantiS Gare tine toic Dad Edd asta dbi dea ded ber 10
82. wise 868 870 MHz programmable 25 kHz 2 5 kHz 25 55 C aging not included FID Half Duplex 5 10 25 50 100 mW 50 ohm programmable 5 10 25 50 100 250 500 mW 50 ohm programmable Conditions for power stability 25 55 C 0 14 100 500 mW 40 3dB 5 50 mW lt 37 lt 108 dBm BER 10E 3 45 dB typical gt 75 dB 1MHz gt 85 dB 310MHz RS 232 DIN41650 16 pin male 300 19200 bps 9600 bps 25 55 C tests acc to ETSI standards 40 C 75 absolute minimum maximum 40 85 SMA 50 ohm female Aluminium enclosure 57 x125 x 16 mm 1259 8 30 VDC Input voltage V O peration mode typical values Receive Transmit on different power Power Standb mA levels mA Save y 500mW 100mW 5mW_ mA uA 8 136 444 244 168 25 55 12 89 296 166 105 19 62 30 40 128 16 47 13 1717 NO TE Values are subject to change without notice SATELLIN E 1870 and 1870E User Guide version 4 0 1 2 General information on the 868 870 MHz SRD band According to the recommendation CEPT ERC REC 70 03 new common spectrum allocations for Alarms and Short Range Devices SRD have been taken into use in countries which are a member of The European Conference of Postal and Telecommunications Administrations The 868 870 MHz band is divided into sub bands according to t

SATELLINE 1870 & 1870 E user guide

Contents

Download Pdf Manuals

Related Search

Related Contents

SATELLINE 1870 &amp; 1870 E user guide

Contents

Download Pdf Manuals

Related Search

Related Contents

SATELLINE 1870 & 1870 E user guide