User Manual
Contents
1. Nopsa packet in hexadecimal ETX BCC Response is transferred also same way in hexadecimal but N command is not appended ACK Nopsa response in hexadecimal ETX BCC Transport protocol Modbus RTU Command function 110 Ox6E is reserved for Nopsa commands in Modbus free command area After function code there is one byte which informs Nopsa packet length ID 0x6E Length Nopsa packet CRC Response is in same format Ox6E Length Nopsa packet CRC Nopsa response Each response contains first status byte Bit Description 7 Internal error Device has detected some internal malfunction In example flash memory don t respond More detailed error information need to be request by Meku Diag 6 External error Device has detected some external error More detailed error information need to be requested by Meku Diag 2 0 Command progress 0 OK 1 Command is not supported 2 Parameter error 3 Device is unable to process the command at the moment busy 4 Command is legal but some error caused it to fail If response is not OK then the response data is not response for the command Command specific data begins immediately after status byte 19 Nopsa command group 1 Basic commands Command Response 1 0 Type 0x01 0x00 status string string Device type as string gt FT20 Command Response 1 1 Version 0x01 0x01 status string2. Nokeval OVA Model FT20RTC433 Wireless Transceiver 433 92MHz Paired with A163794 C Oz Nokeval Nokeval OVA Model FT20RS485 FT20 3 h amp Uv Ww gt Contents DOCUMENT INTONIMALION ams tds ia dada sa ilatina 2 ION iii a 3 Trademarks niniin cai 3 Manufactura Ita TA iii ATi 3 O A a da as 4 Maintenance acciona ata doe 8 NR O O 9 Operationerna n anar so do ca sete 13 A acc siis EEE EAE AEA vaybocecsagetcetuyseteetaduedesauvveeecsaasetceduyieeceaasuedeaaavbeceeesuets 14 MOdbus prot tOl sssrinin saaveodeatedcesshivecde dadecbessslveeddeatckcecahaveden sad cddengnivecddendcacedabtveceedadedcesdsbeconlanness 15 NO PSA COMMANAS tiara 18 SPOCiTIGATIONS PONER A Tu a eee oe tte sect ee a tet ccce es ee 22 Document information Device Scope FT20 Device Versions 1 0 to 1 0 Document Type manual Document ID 2873 Document Version 8 Document Date 3 11 2011 Introduction FT20 is a radio data receiver and repeater for Nokeval MTR FTR and KMR series wireless transmitters Type FT20 RTC433 RECEIVER means the device is pre set as receiver only Type FT20 RTC433 REPEATER means the device is pre set as repeater and is supplied with a power supply FT20 receives and buffers the data packets that wireless transmitters have sent It can also relay the data packets so that large areas can be covered using only one receiver It automatically recognizes the types of the transmitters so different
3. protocol which takes care of addresses transfer error management and packet length This device supports Nopsa commands over either Nokeval SCL or Modbus RTU protocols Supported Nopsa commands 1 0 Type Read device type 1 1 Version Read device version 1 2 Serial number Read serial number of the device 1 3 Description Read short description of the device 1 4 Command set Read command set number for the device 1 5 Serial buffer size Read serial buffer size 1 7 Radio ID Read radio ID 1 16 Reset Reset device 1 32 Meku Pass Meku configuration commands to device 2 0 Out value request Read channel reading 2 1 Out resource request Read channel metadata name data type 4 0 Buffer info Read buffer size and current write position 4 1 Find oldest from buffer Move read position to oldest entry in buffer 4 2 Find newest from buffer Move read position to newest entry in buffer 4 3 Read buffer with index Read specific data entry from buffer 4 4 Read next from buffer Read data entry from buffer and move read position to next 4 5 Reread last Returns last read operation contents 7 10 Carrier Turn carrier on or off 7 11 Test packet Send RF test packet 18 Transport protocol SCL When Nopsa packets are transported on SCL data is converted to hexadecimal notation 0 9 and A F One Nopsa byte will become 2 bytes No spaces between characters Packet starts with SCL command N and a space ID N
4. 31 types 4 FLOAT flags 0 name Ch1 Ch32 20 Nopsa command group 4 Logger commands Real time data buffer commands Command Response 4 0 Buffer info 0x04 0x00 status size 2 write position 2 size Ring buffer size 96 write position position next to be written Command Response 4 1 Find oldest 0x04 0x01 status read position 2 lap counter read position position where is oldest data lap counter how many times ring buffer has rolled over 0 255 Command Response 4 2 Find newest 0x04 0x02 status read position 2 lap counter read position position where is newest data lap counter how many times ring buffer has rolled over 0 255 Command Response 4 3 Read buffer with index 0x04 0x03 index 2 status index 2 lap counter timestamp 4 id 2 type data n index buffer read position lap counter how many times ring buffer has rolled over 0 255 timestamp 4 byte timestamp 0 id data origin type 32 STRUCT Command Response 4 4 Read next 0x04 0x04 As in command 4 3 In case of no new data return only status byte Command Response 4 5 Reread last 0x04 0x05 As in command 4 3 Return data which was read last This has its uses when serial communication error happens Data structure Data structure in buffer is f
5. Chi Flags WORD See Table E2 Measured values are available in 4 different word byte order formats in registers below 1000 All floats are 32 bit floating point numbers according to IEEE 754 Note In case the reading is too old older than the timeout parameter configured in the menu specifies or there is no reading for a channel then float value is Quiet NaN 0x7FC00000 and word value is Ox7FFF In registers 0 63 Least significant word first inside word most significant byte first In registers 200 263 Most significant word first inside word most significant byte first In registers 400 463 Least significant word first inside word least significant byte first In registers 600 663 Most significant word first inside word least significant byte first In registers 1000 1031 results of channels are presented using fixed point notation with 1 decimal In example integer 150 means 15 0 16 Holding registers Address Name Type Values 2000 Conf Serial Protocol ENUM See table E3 2001 Conf Serial Baud rate ENUM See table E4 2002 Conf Serial Bits ENUM See table E5 2003 Conf Serial Address BYTE Unsigned 0 247 2004 Conf Channels Timeout min BYTE Unsigned 1 255 2005 Conf Channel
6. e BYTE 8 bit value Only lower right hand side byte used e WORD 16 bit value e ENUM List of alternatives e FLOAT 32 bit float IEEE 754 Least significant word first inside word most significant byte first e STRINGZ Zero terminated string In one Modbus register data is presented as most significant byte first 15 Input registers 0 1 Ch1 Reading FLOAT LSW MSB Signed Table E1 2 3 Ch2 Reading FLOAT LSW MSB Signed Value Type ES z 0 MTR260 62 63 Ch32 Reading FLOAT LSW MSB Signed 1 MTR262 2 MTR264 200 201 Ch1 Reading FLOAT MSW MSB Signed 3 MTR265 202 203 Ch2 Reading FLOAT MSW MSB Signed 4 MTR165 sis i 5 FTR860 262 263 Ch32 Reading FLOAT MSW MSB Signed 6 CSR260 7 Unknown 400 401 Ch1 Reading FLOAT LSW LSB Signed 402 403 Ch2 Reading FLOAT LSW LSB Signed 462 463 Ch32 Reading FLOAT LSW LSB Signed Table E2 Bits Bits 600 601 ChilReading FLOAT MSW LSB Signed 0 6 Age counter min 602 603 Ch2 Reading FLOAT MSW LSB Signed 7 Data changed 662 663 Ch32 Reading FLOAT MSW LSB Signed 1000 Chi Reading WORD Signed 1001 Ch2 Reading WORD Signed 1031 Ch32 Reading WORD Signed 2000 Chi ID WORD Unsigned 2001 ChiXType ENUM See Table El 2002 Ch1i Battery WORD Unsigned 2003 Ch1 Signal WORD Unsigned 2004
7. 50 60 Hz 150 mA Class II Europlug The power supply is only designed for indoor use and should not come into contact with water or dust LEDs Internal LED Glows through the case Settings Connection Protocol Software Environmental Operating temperature Storage temperature Humidity Protection class Dimensions Length Width Height Weight Regulations EMC immunity EMC emissions R amp TTE directive EN 300 220 class 3 EN 300 489 EN 300 339 22 Transmission activity Blinks slowly Ready for operation Blinks rapidly Reception activity RS 485 or POL Nokeval SCL Meku 1 Mekuwin for Windows 30 60 C 40 70 C max 90 RH non condensing IP66 379 6 mm inc antenna 60 2 mm 32 5 mm 123 g EN 61326 EN 61326 class B
8. MTR series transmitters for example MTR260 and FT10 can be defined to act as certain channels For example when the assigned to channel one To assign a device to channel one set the transmitter s ID to Ch1 ID value Other channels can be assigned in the same way ID Identification ID number of the transmitter 1 65535 Value Defines where the contents reading of the channel comes from e Input Measurement result from the wireless transmitter e cB TcC TcD TcE TcG TcJ TcK TcL TcW TcR TcS or TcT Used thermocouple linearization if transmitter in question can measure temperature with thermocouples but cannot perform the necessary thermocouple linearization by itself e Batt Battery voltage of the transmitter e CJ Cold junction temperature of the transmitter e RSL Received signal level e Interval Tells how many seconds between successive receptions from the transmitter e Age Tells how many seconds have passed since last reception from the transmitter e jumps The number of repeaters the data from the transmitter has passed through Reading Channel reading Info Shows information on the corresponding transmitter Signal level battery voltage seconds elapsed from the last reception transmitter type and number of repetitions Repeater If ID filter is checked in Repeater submenu only those IDs will be repeated that have this setting on 11 Repeater submenu Repeater e Off Repeater funct
9. a line of sight from the receiver to the transmitter Walls and objects between the transmitters attenuate the signal and thereby shorten the range On the other hand metal surfaces cause reflections which might lengthen the range Placing the repeaters The repeater must be placed in the coverage area of at least one receiver For example in the picture below the whole warehouse is covered using two repeaters that are placed near both ends of the warehouse In this way the receiver that is placed in the center of the warehouse can receive transmissions anywhere from the warehouse Using two repeaters The picture below shows how two repeaters can be daisy chained The downside of daisy chaining is that now both repeaters relay also the data that they receive from the other repeater This increases radio traffic and therefore decreases the maximum allowed number of radio transmitters in a coverage area See the transmitter s manual or example table on page 6 how the use of repeaters affects the maximum number of transmitters Both repeaters can be placed in the coverage area of one receiver like in the example picture below Me Y i SS dl N a d yt x N A Z N X ld Z ra oor oc ca La E Na SERS l a A Ss te I X R A 50 200 m X Warehouse CN Repeater 1 l Repeater Coverage area y a SNe y Receiver 7 The maximum
10. can be useful during installation and which may facilitate monitoring the system s operating condition Uptime h LastID LastType Last RSL dBm RSL dBm Switches 12 Operation FT20 has one diagnostic LED that shines through the case of the device This LED blinks slowly when the unit is operational but not receiving any radio data packets at the moment and blinks rapidly when radio data packets are being received Receiver operation Promolog data acquisition software PromoLog is a modular data acquisition software allowing you to design customized data collection and monitoring applications matching your needs Applications are created by dragging suitable modules from library onto the screen Both wireless and wired transmitters are supported practically without channel limits You can also place photos or drawings on the background Serial commands In case PromoLog data acquisition software is not used for reading data from the device then following protocols can be used to read data from the device e Nokeval SCL protocol page 14 o Reading with SCL commands o Reading with Nopsa commands over SCL protocol page 18 e Modbus RTU protocol page 15 o Reading Modbus registers o Reading with Nopsa commands over Modbus protocol page 18 13 SCL protocol A full specification of the Nokeval SCL protocol can be downloaded from Nokeval WWW site In short the command frame consists of an address byte bus addres
11. col Serial communication settings e SCL Nokeval SCL protocol Default e Modbus RTU Modbus RTU protocol Baud rate Baud rate selection 300 600 1200 2400 4800 9600 19200 38400 57600 115200 230400 Default 9600 Bits Bit selection 8N1 8N2 8E1 801 Note SCL protocol uses always 8N1 this item does not appear when the protocol is SCL Modbus RTU uses commonly 8E1 Address Serial communications address selection Since several devices can be attached to a bus each device needs to be configured to a different Address Valid SCL addresses are 0 123 Valid Modbus RTU addresses are 1 247 Default O 10 Channels submenu Up to 32 channels can be set up in the radio receiver These channels can be set up to contain any data received from the radio transmitters The values of these channels can then be queried over the serial interface This menu contains settings for configuring these channels Timeout The number of how many minutes have to pass since last reception until it is determined that the device is not transmitting anymore and its value is set to NaN Not a Number For example if Timeout 10 min then channel value is set to NaN when more than 10 minutes but less than 11 minutes have passed since last reception Count Sets how many channels are used 0 32 device receives MEA CH 1 command it sends latest received data from the transmitter that has been Ch1 Ch32 32
12. er which it is turned 90 degrees clockwise Antenna can be removed by turning it counterclockwise after which the antenna can be pulled off Jumpers FT20 has three jumpers in the serial module RS485 AC term RS 485 termination jumper default serial settings jumper and jumper which turns repeater on or off if enabled in firmware settings If the device is the last device on the RS485 bus and the bus is long say more than 100 m it is recommended to set the RS485 AC term jumper to on position When this jumper is set AC termination is used which means that 1 nF capacitor and 110 ohm resistor are connected in series between the bus wires Maintenance Cleaning The plastic parts can be cleaned with a soft cloth and soap water The cloth must be damp but not wet Cleaning with isopropyl alcohol is also allowed Firmware settings Repeater mode User does not normally need to setup the device By default the device type FT20 RTC433 REPEATER is setup as repeater repeater jumper is on and it repeats all the received data packets In some special cases for example when there is lot of transmitters ID filtering may be needed Receiver mode If you use PromoLog data acquisition software then there is generally no need to configure the device Just check that the repeater jumper is off because the repeater mode is not needed and thus prevent the extra radio traffic Mekuwin MekuWin can be used to change settings on vari
13. es of the enclosure and at the same time pulling the modules apart For receiver operation the serial module must be opened for RS485 and power cables installation Serial module can be opened by gently pushing a screwdriver into the slot that holds the cover plate When the cover plate is removed the circuit board can be pulled out of the enclosure Connections Power 01 Diag LED 8 30 VDC is E ica O Repeater l RS 485 5 04 pereur gaat speme Transmit RS485 AC term e LEDO FT20 serial module has a 4 pin terminal block for power supply and RS 485 connection Serial module features also a round 3 5 mm POL programming connector jack found on many other Nokeval products as well FT20 radio module contains BNC type antenna connector Power supply The supply voltage range is 8 30 VDC and is connected to terminals 1 and 2 Power demand is 50 mA FT20 is protected against wrong polarity of the supply voltage RS 485 serial bus RS 485 is used when the device operates as a receiver RS 485 interface can easily be added to a computer by using Nokeval DCS770 or DC771B USB RS 485 converter or RCS770 USB RS 232 RS 485 converter If you use DC771B converter no external power supply needed DC771B s power supply should be set to 10V RS 485 bus is connected to terminals 3 D1 and 4 DO The supply voltage s negative terminal 2 can also use as ground for RS 485 The RS 485 bus con
14. ion is off e On Repeater function is on Repeater e Jumper Jumper controls the repeater function Default setting ID filter ID filter If checked only those IDs that are checked in Channels ChX Repeater submenu will be repeated Default unchecked Replace with RSL Extra bytes If checked the device adds additional information to the repeated data packets Number of hops and the received signal strength Group of repeaters can deliver received signal level of the weakest link Default unchecked Max jumps If the Extra bytes setting is checked in all repeaters in the system this setting can limit the number of repeats jumps and thus prevent an endless repeating cycle of data packets Default value 15 Replace with RSL This setting is reserved for testing purposes only When checked the original measurement value of the repeated data is replaced with the received signal level Default unchecked Advanced Options submenu Weak repeater filter When checked the repeater function will not repeat already repeated data packets that have a received signal level weaker than already received Default Advanced Options checked Weak repeater filter Compatibility mode Compatibility mode When checked the receiver uses an alternate signal processing algorithm Try different setting if you have problems with reception in low signal level conditions Default checked Monitor menu Monitor menu contains some information that
15. kinds of transmitters can be used simultaneously Transmitters can also have different transmission intervals FT20 uses license free 433 92 MHz frequency band ISM so it can be freely used for example almost in whole Europe FT20 is housed in a watertight IP 66 and impact resistant plastic enclosure The joint between the two modules is sealed with two rubber O rings The receiver is connected to a computer using RS 485 bus and it requires e g PromoLog data acquisition application that reads the data from the device Nokeval SCL or Modbus RTU protocol is used for data transmission between the receiver and the computer Multiple receivers can be connected in parallel to an RS 485 bus to increase the coverage area FT20 has one diagnostic LED and it requires 8 30 VDC power supply Trademarks This device uses the FreeRTOS real time operating system version 6 0 5 The source code of the RTOS is available on request contact support nokeval com Manufacturer Nokeval Oy Yrittajakatu 12 FI 37100 Nokia Finland Tel 358 3 3424800 Mo Fr 8 30 16 00 EET WWW http www nokeval com email sales nokeval com support nokeval com Installing Mounting The best installation environment for a radio receiver is above a big grounded horizontal metal surface surrounded by as few as possible vertical metal surfaces Antenna is to be installed perpendicular to the metal surface The best range for the transmitter is achieved when there is
16. number of transmitters The maximum number of radio transmitters in a coverage area is limited by radio standards The use of repeaters reduces the maximum number of transmitters because repeaters use the same frequency channel as transmitters The following example table shows the allowed maximum number of Nokeval radio transmitters in a coverage area Receiver and Receiver and Transmission Receiver 1 repeater 1 repeater Interval s Maximum number of transmitters 5 22 11 7 10 43 22 14 20 87 43 29 30 130 65 43 40 174 87 58 50 217 109 72 60 261 130 87 70 304 152 101 80 348 174 116 90 391 196 130 120 522 261 174 240 1043 522 348 For example if you have transmission interval of 20 seconds and one repeater the maximum number of transmitters is 43 Note ID filter can be used to reduce the radio traffic caused by the repeaters Using ID filter only the desired transmitter data packets is repeated see the section Firmware settings sections Repeater ID filter and Channels Repeater Enclosure FT20 consists of a radio transceiver module FT20 RTC433 and a processor serial module FT20 RS485 Before use please make sure that the modules are pushed together all the way so that the locking latches snap into position 379 6 Opening the case Modules can be detached from each other by pressing the locking latches on the sid
17. ollowing Table for possible device types Data type STRUCT Type Value Struct type 0 Raw radio data packet MTR260 0 Device type 1 byte MTR262 FTR262 2 Signal strength 1 byte Subtract 127 to get result in dBm MTR264 4 Bytes battery 1 byte 3 msb data bytes 5 Isb battery MTR265 5 voltage Divide battery by 10 to MTR165 6 get result in volts FTR860 7 Data bytes 0 7 bytes Information is dependent on CSR264S 8 device type CSR264L 9 CSR264A 10 CSR260 11 KMR260 12 21 Radio Antenna Connector Antenna Max input power Frequency band Ring buffer memory Specifications 50 Q BNC female connector Whip antenna 10 dBm license free 433 92MHz ERC REC 70 03 sub channel f sub channel e in older specs 96 latest transmissions RS 485 serial connection Connector Protocol Baud rates Modbus parity Power supply Connector Voltage Current 4 pin terminal block combined with power supply terminal 3 D1 terminal 4 DO Maximum cable length is 1000 m Nokeval SCL Modbus RTU Nopsa 300 600 1200 2400 4800 9600 19200 38400 57600 115200 230400 bits s 8N1 8N2 8E1 801 4 pin terminal block combined with RS 485 terminal 1 terminal 2 8 30 VDC 50 mA External Power supply for FT20 RTC433 REPEATER Input voltage Input frequency Max input current Insulation class AC power plug Enclosure 100 250 VAC
18. ous Nokeval products It has a unique feature it loads the structure and the contents of the configuration menu from the target device so the same MekuWin version can be used with past and forthcoming products There is no need to update this software every time a new product or product version is released You can download Mekuwin from Nokevals web site for free Mekuwin has its own instruction manual It is also possible to change the configuration settings remotely by writing to the appropriate Modbus Holding registers With a POL programming cable The communications parameters for POL are always Protocol SCL Baud 9600 Parity 8N1 Address 0 Over the RS 485 serial bus The Mekuwin communications parameters must match the selections made in the device Serial menu Resetting RS 485 serial communication settings In case RS 485 serial settings are for some reason not known they can be temporarily set to defaults by the default RS485 settings jumper shown in the figure on page 7 when the device is powered up Default communication parameter settings Protocol SCL Baud 9600 Parity 8N1 Address 0 Configuration settings The configuration settings are arranged as a hierarchical tree The Conf menu has submenus and these contain settings and possibly more submenus etc Menu of the FT20 Repeater Advanced Options Weak repeater filter Compatibility mode Serial submenu Proto
19. psa command in SCL The Nopsa command is converted to hexadecimal characters without spaces E g querying the serial number N 0102 The device responds with hexadecimal characters carrying a Nopsa response See section Nopsa commands MN lt hexadecimal data gt A legacy command for encapsulating Meku configuration commands in SCL protocol Using Nopsa is recommended 14 Modbus protocol Supported Modbus RTU commands e 3 Read Holding Registers Read settings e 4 Read Input Registers Read result values e 6 Write Single Register Change settings e 16 Write Multiple registers Change multiple settings at once e 17 Report Slave ID Device type information e 109 Meku This is used by Mekuwin configuration software e 110 Nopsa This is used to transport Nopsa protocol on Modbus Command 17 returns 0x11 lt byte count gt 0x00 OxFF followed by for example FT20 V1 0 A123456 Maximum Modbus packet length is 240 bytes This affects the maximum possible register count that can be accessed simultaneously with commands 3 4 and 16 When settings are changed the device will save the settings instantly into the configuration EEPROM memory If serial settings are changed new settings will take effect only after cycling the device power it works this way so that all serial settings can be done at once without breaking the serial connection Data types e BOOL On off value O off 1 on in lower right hand side byte
20. s 128 a human readable command an ETX character ASCII 3 and an XOR checksum of all bytes excluding the address byte A normal response consists of an ACK ASCII 6 a human readable response an ETX and an XOR checksum of all the bytes including the ACK An error response is similar but the ACK is replaced by a NAK ASCII 21 Nokeval SCL always uses 8N1 parity SCL Commands This device supports the following SCL commands TYPE Returns the model name and software version of the device SN Returns the device s serial number for example A123456 MEA CH lt ch gt Returns the last received value from the channel lt ch gt The response may contain digits 0 9 minus sign and a decimal point The scientific representation 1 00E 3 is not used If the channels result is NaN Not A Number device returns MEA SCAN lt first gt lt last gt Returns the last received values of channels lt first gt to lt last gt separated with a space E g MEA SCAN 1 3 will return the values of channels 1 2 and 3 An example response 25 6 29 1 0 If the channels result is NaN Not A Number device returns DBG 1 Returns the oldest unread data packet from the ring buffer DBR 1 lt xx gt Returns a data packet from the ring buffer at location lt xx gt DBX Clears the ring buffer marks all data packets as read DBS 1 Returns the size of the ring buffer N lt hexadecimal data gt Encapsulating a No
21. s Count BYTE Unsigned 0 32 2006 Conf Channels Ch1 ID WORD Unsigned 2007 Conf Channels Ch1 Value ENUM See table E6 2008 2009 Conf Channels Ch1 Reading FLOAT Signed 2010 2025 Conf Channels Ch1 Info STRINGZ Len 32 2026 Conf Channels Ch1 Repeater BOOL 2027 Conf Channels Ch2 ID WORD Unsigned 2028 Conf Channels Ch2 Value ENUM See table E6 2029 2030 Conf Channels Ch2 Reading FLOAT Signed 2031 2046 Conf Channels Ch2 Info STRINGZ Len 32 2047 Conf Channels Ch2 Repeater BOOL 2678 Conf Repeater Repeater ENUM See table E7 2679 Conf Repeater ID filter BOOL 2680 Conf Repeater Extra bytes BOOL 2681 Conf Repeater Max jumps BYTE Unsigned 1 15 2682 Conf Repeater Replace with RSL BOOL 2683 Conf Advanced Options Weak repeater filter BOOL 2684 Conf Advanced Options Compatibility mode BOOL Enum values Table E3 Table E5 Table E6 Value Protocol Value Bits Value Value 0 SCL 0 8N1 0 Input 1 ModbusRTU 1 8N2 1 TcB 2 8E1 2 TcC 3 801 3 TcD 4 TcE Table E4 Table E7 5 TcG Value Baud rate Value Repeater 6 TcJ 0 300 0 Off 7 TcK 1 600 1 On 8 TeL 2 1200 2 Jumper 9 TcN 3 2400 10 TcR 4 4800 11 TcS 5 9600 12 TcT 6 19200 13 Batt 7 38400 14 CJ 8 57600 15 RSL 9 115200 16 Interval 10 230400 17 Age 18 Jumps 17 Nopsa commands Nopsa is a command language which enables measurement data and configuration data transfer Nopsa can be used to transfer data between devices or from host to device Nopsa needs some transfer layer
22. sists of a bidirectional half duplex twisted data pair and a common wire The cable should be shielded the shield earthed at one point The nominal impedance should be approx 100 120 Q The length of an RS 485 bus can be up to 1 km and it can be connected to 32 devices more can be connected via bus repeaters If the bus is long say more than 100 m it is recommended to terminate the first and last device on the bus set the RS485 AC term jumper to on position The polarity of the data pair is important Modbus specifications call the positive idling line D1 but it is also commonly known as B and A Correspondingly the negative idling line is A or B The bus needs one device that gives a small voltage between the data wires when no device is transmitting on the bus This is called biasing or fail safing The master device is usually the natural choice for biasing POL connector The POL connector is convenient for configuring when the device operates as a repeater This connector can be used when the modules are disconnected from each other Note that when the POL plug is connected the RS 485 bus is disabled Two types of programming cables are available e POL RS232 for the RS 232 port of the computer e DCS772 for the USB port of the computer recommended Antenna Antenna is connected to the transceiver modules s BNC connector Antenna is first pushed into the BNC connector by aligning it with two guide posts aft
23. string Device version as string gt V1 0 Command Response 1 2 Serial number 0x01 0x02 status string string Device serial number as string gt A123456 Command Response 1 3 Description 0x01 0x03 status string string Device description as stri ng gt Wireless data receiver and repeater Command Response 1 4 Command set 0x01 0x04 status set 4 4 means 4 bytes Set Informs which Nopsa command set device implements Command sets are described in another document Command Response 1 5 Serial buffer size 0x01 0x05 status size size Informs serial buffer size of the device Command Response 1 16 Reset 0x01 0x10 No response Device resets immediately after command and don t response for it Command Response 1 32 Meku 0x01 0x20 Meku command status Meku response Command used by Mekuwin configuration software Command Response 1 7 Radio ID 0x01 0x07 status id 2 id Device radio ID Nopsa command group 2 Data commands Command Response 2 0 value request 0x02 0x00 number status type data 4 number Channel number 0 31 type 4 FLOAT data float IEEE75 4 Command Response 2 1 resource request 0x02 0x01 number status types flags name n number Channel number 0
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