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Modbus TCP/IP 10/100 Industrial Ethernet I/O Modules

1. Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 2 8 BusWorks 981 982 983EN Module User s Manual Register Map Model 983EN 4012 Note Clearing a timeout via an I O read or write does not return the output s to their initial state They remain in their timeout states until otherwise written Configuration variables stored in holding registers 4xxxx reference addresses are maintained in EEPROM except as noted Holdin Description Modbus TCP IP Digital I O Data Type Format Registers 4x References Read Write 40005 4 0004 Port 1 CH 4 7 Timeout State 982EN and 983EN Only Default 65535 Disabled Port 2 CH 8 11 Timeout State 982EN and 983EN Only Default 65535 Disabled The four lower order bits of this 16 bit register value define the state the output channels of the port will be programmed to following a watchdog timeout Bit 0 corresponds to channel 4 bit 1 to channel 5 bit 2 to channel 6 and bit 3 to channel 7 Write 65535 FFFFH to this register to leave the outputs unchanged following a timeout this is also the default value The four lower order bits of this 16 bit register value define the state the output channels of the port will be programmed to following a watchdog timeout Bit 0 corresponds to channel 8 bit 1 to channel 9 bit 2 to channel 10 and bit 3 to channel 11 Write 65535 FF
2. Y RTN Digital Outputs 982EN amp 983EN Only Examples Solid State Relay SSR or LED Driver Relay Coil or Solenoid Driver Note Protection Lamp Driver INCANDESCENT LAMP CONTROL EXC 983EN ee ek SIP RESISTOR 5v X INSTALLED 4 on E IN SOCKET O ERa i 100K lorF Jv of eet 5 35V VO R XY 982EN 983EN CH 2 Ly ON ELT lore O RTN Note Per UL when the outputs are used to control interposing relays for switching AC and DC devices of higher voltage current the coil ratings for the interposing relay shall not exceed 24VDC 100mA v Connect Earth Ground as shown in the connection drawings above Earth Ground Additionally connect the GND terminal TB3 33 to earth ground The ground connections noted are recommended for best results If sensors are already grounded use caution and avoid making additional ground connections which could create ground loops The plastic module housing does not require earth ground Warning To comply with safety and performance standards use shielded cable and connect earth ground as noted Failure to use good wiring and grounding practices may be unsafe and hurt performance Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 1 0 BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O
3. csceceeeeeeeeeeeeeeeeeees 17 Trouble Browsing Your Module 2 00 18 Getting Out Of Trouble ceeeeeeeeeees 18 TECHNICAL REFERENCE KEY FEATURES ani aaa E 19 HOW IT WORKS 0c cece eeeeeeee eens eee eee eeeeeeeeeeeeees 20 ABOUT MODBUS TCPIIP 0sceceeeeeeeeeeeeeeeeees 21 IP AdCreSSing 2 2 sceseeeeeeeeeeeceeeeeeeeseeeens 21 Dynamic Host Configuration Protocol 23 Domain Name System DNS 0 020 23 MODBUS REGISTERG 2 cceececeeeeeeeeeeeeeeeseees 23 Register FUnCtions ceeeeseeeeeeeeeeeeeerees 23 Register Mirroring c0sesceeeeeceeeeeeeeeeeeneees 24 Data TYPOS ni ceccicceccecsgieticecedentecentenes cncceees 25 Register Map scecsceeeeeeeeeeseeeeeeeeseseeees 26 SPECIFICATIONS sairaana 29 Model NumbetS 0 eceeeeeeeeeeeeeeeeeeeeeeeeees 29 Digital INputs ccececeeeeeee eee eeeeeeeeeeeeneeer 29 Digital Outputs ceeceeeeeeeeeeeeneeeeeeeeaeeee 29 General Specifications 0seseeeeeees 30 Enclosure and PhySiCal csesceeeseeeeeeees 30 Agency Approvals cescecseeceeeeeeeeeeeeeeeenens 31 Environmental 2ccceceeeeeeeeeeeeeeeeeseeeeeneees 31 Ethernet Interface scsceeeeeeeeeeeeeeeeeeeeees 32 Controls amp INdiCators ccceeeeeeee ences eens 33 ACCESSORY CABLEG 0 cs eeeeeeeeeeeeeeeeeeeeeees 33 Acromag Inc Tel 248 624 1541 Fax 248
4. 15 TO 36VDC ie EARTH GROUND INPUT POWER IS ISOLATED CAUTION Risk of Electric Shock More than one disconnect switch may be required to de energize equipment before servicing Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual IMPORTANT External Fuse delivering more than 1A to the unit it is recommended that this current be limited via a high surge tolerant fuse rated for a maximum current of 1A or less for example see Bel Fuse MJS1 v Connect digital input signals to the input terminals see figures below If unit is powered from a supply capable of SIMPLIFIED 981PB CHANNEL Input Only 5 6K SIP RESISTOR EXC 3 3 EXC INSTALLED 5V IN SOCKET 5 6K SIP RESISTOR INSTALLED IN SOCKET TO OTHER 3 SIMPLIFIED 983PB CHANNEL Tandem Input Output Modbus TCP IP Digital I O 1 CONNECTIONS Digital Inputs 981EN amp 983EN Only Inputs are active low Input threshold is TTL TO OTHER 3 A CHAN OF PORT RTN H J N 1 4 ON 1 vo CHAN OF PORT FE Lore S t Ad twee 0O WS Pm 100K OFF 0 i H 7 TVS TEP 4 Tvs R ON 1 4 Kay of OFF 0 CH ona aay q CH Active LOW MO YA LED Active LOW ALED SH o
5. Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 29 These DIN rail mount industrial ethernet digital I O modules include twelve SPECIFICATIONS digital inputs 981EN twelve digital outputs 982EN or twelve combination digital input output channels 983EN and provide an isolated 10 100BaseT Ethernet port for monitoring and control Units are DC powered and include reverse polarity protection Outputs are open drain low side switches while inputs are active low Channel I O network and power circuits are isolated Outputs have high voltage current capacity for discrete on off control of external devices Non inverting buffered inputs provide support for digital level sensing or for simply reading back the tandem output 983EN only I O channels share common Pull up resistors to the port EXC supply every four channels are installed in sockets on the board Non volatile reprogrammable memory in the module stores configuration information The BusWorks model prefix 900 denotes the Series 900 network I O Model Numbers family The EN suffix denotes EtherNet Select 981EN for digital inputs 982EN for digital outputs or 983EN for tandem digital inputs and outputs 981EN 4012 Input Only The four digit suffix of this model number represents the following options 982EN 4012 Output Only respectively
6. Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com Modbus TCP IP Digital I O 1 2 BusWorks 981 982 983EN Module User s Manual Note that Acromag Series 9xxEN Ethernet I O modules may take from 3 to 30 seconds to boot upon power up depending on your network configuration and whether a DHCP server is present This module can be placed into a default communication mode via the DFT toggle switch at the front of the module Default Mode uses a static IP address of 128 1 1 100 a default subnet mask of 255 255 255 0 a default username User anda default password passwordoo E Network Configuration Page Microsoft Internet Explorer Jog File Edt view Favorites Tools Help a Q x e A pO search she ravortes A m BaS ddress http 128 1 1 100 configure shtml MI gt co nks a 983EN 4012 Network Configuration Page Static IP Address 128 1 1 100 Number of Sockets 10 DNS Server 128 1 1 10 Subnet Mask 255 255 255 0 Gateway 0 0 0 0 Host Name 983en Active IP Address 128 1 1 100 MAC Address 00 01 C3 00 07 43 Use Static IP Addressing OUse DHCP BOOTP OUse DHCP BOOTP W Fallbacks Wink On Off i Test Page Password Configuration Page f VO Mapping ph Home Page E Done internet NOTE In order to network your PC with an Acromag module
7. 4 Ethernet 0 Default 12 12 Channels 983EN 4012 Input Output Twelve active low buffered inputs with a common connection RTN For Digital Inputs DC voltage applications only Inputs include transient suppression and have 981EN amp 983EN Only series connected 100K resistors plus diode over voltage clamps to the internal 5V supply Sockets are provided at each port group of four channels for installation of SIP resistor networks that serve as pullups to the port EXC supply terminal 5 6K pull up resistor SIP s are installed from the factory External excitation pull up supply is required for proper operation and is connected between the port EXC and RTN terminals Input Signal Voltage Range 0 to 35VDC Input Current 293uA typical at 35VDC This is computed as the applied input voltage minus 5 7V divided by the series 100KQ input resistance Input Signal Threshold TTL compatible with 100mV of hysteresis typical Low to High threshold is 1 7VDC typical High to Low threshold is 1 6VDC typical Limit logic transition to TTL levels of 0 8VDC Max LOW level and 2 0VDC Min HIGH level Input Resistance 100KQ typical Input Hysteresis 100mVDC typical Input Response Time 800ns typical measured from input step to logic transfer Actual input response will vary with interrupts Twelve open drain DMOS mosfet switches with a common source Digital Outputs connection at the port RTN terminal For
8. WEB BROWSER Home Page This module supports Modbus over TCP IP You may use your own software to issue Modbus commands to this module see Modbus Registers or you may use a standard web browser as these modules have built in web pages that allow you to setup and control the module Simply execute your web browser type the IP address assigned to your module in the Address window http 128 1 1 100 for our example click Go and you will be presented with a Home Page window similar to that shown below Home Page Microsoft Internet Explorer Loe File Edit View Favorites Tools Help a Q x 2 GD Pan fers R G maa Address http 128 1 1 100 index shtml yo i A 983EN 4012 Home Page Network Configuration Page f Test Page j f KORVET ae f Password Configuration Page Copyright 2003 2005 Acromag Inc All rights reserved z a Internet The Home Page provides buttons to access the other web pages of this module that are used to configure the network parameters change the user name and password and operate the module For each new browser session that accesses the Home Page of this module you will be presented with a window prompting you to enter the current User Name and Password as shown below This information is required before the program will allow you to make any other selections The default user name and password is User and p
9. successfully established a connection ACT Yellow Indicates Ethernet activity Ethernet connection is busy traffic is present Output Yellow One Per Output ON if output relay is ON closed or input is asserted low Note This LED is driven by the input buffer of 981 983EN units and will reflect the actual input state On 982EN units output only this LED is driven by the output mosfet gate signal and may not reflect the actual open drain output state for example if the outputs are floating or not pulled up Controls Reset Default Address Switch This momentary toggle switch is located on the front panel and is used to either reset the module toggle right or toggle the module into or out of Default Communication Mode toggle left In Default Mode the module assumes the fixed static IP address 128 1 1 100 a default subnet mask 255 255 255 0 a default username of User and a default password of password00 This switch can also be used to restore the module to its initial factory configuration by holding this switch in its default position while powering up the unit see Getting Out Of Trouble in the Troubleshooting section for more information The minimum cable required for full operation of this device is Category 5 ACCESSORY The term Category refers to classifications of UTP Unshielded Twisted Pair cables There are 3 main categories of cable Category 3 Category CABLES
10. the I O Outputs of these models are the open drains of n channel mosfets 982EN amp 983EN Input buffers are connected in tandem with the drain circuits via series 100KQ resistors and include over voltage clamps to 5V connected at the buffer inputs 981EN amp 983EN The I O terminals and the Ethernet port terminals also include transient suppression On board sockets are included for installation of optional input or output drain pull up resistors and 5 6K SIP resistors are installed from the factory These resistors are pulled up to an external supply connected to the EXC and RTN terminals An internal microcontroller will switch outputs ON OFF and sample the digital inputs Embedded configuration parameters are stored in non volatile memory integrated within the micro controller A dedicated Ethernet controller handles Ethernet communication A wide input switching regulator isolated flyback provides isolated power to the I O circuit and the Ethernet controller Refer to the simplified schematic shown below to help gain a better understanding of the circuit 983EN SIMPLIFIED SCHEMATIC 3 3V 3 3V 3 3V 3 3V ISOLATED ETHERNET gt VO Active LOW RTN SIMPLIFIED SCHEMATIC 1 CHANNEL OF 12 BURRERPD IN
11. 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 3 Tea Tes APS Pao AID PS Pe i 1 7 Udy vyv vt N fi 46 45 44 43 42 41 a 33 32 31 g E a alg git ES Esse BRE o DIGITAL IN or OUT PWR E O O lo Nw Q Og Model 983EN 4012 Shown ae 981EN 4012 amp 982EN 4012 Similar DIGITAL IN or OUT DIGITAL IN or OUT N Dorso J suonz zT se sssse ai SESTE aw I Kl11 12 13 14 15 16 Bhar 22 23 24 25 26 U U NX ARAAAAA__AAAAAA y a Sis s sis s __ sisisisisis t TBI TB2 1 05 T RAIL DIN MOUNTING l 3 90 26 7 DINEN 50022 35mm 99 1 4 35 a le NOTE Dimensions Are INCHES MILLIMETERS 110 5 MODEL 981 982 983EN ENCLOSURE DIMENSIONS TB4 TBs ADAP D O AIP ADAP Po r RUN PWR LED GREEN MODULE STATUS a ra LED YELLOW Z7 dutut ono Make 46 45 44 43 42 41 3 33 3231 VO LED s YELLOW sb eee Bt aia ale O OST oN WHEN OUTPUTS ARE EEESES zeg
12. A 3x reference register contains a 16 bit number received from an external source e g an analog signal Read Write Output or Holding Registers A 4x register is used to store 16 bits of numerical data binary or decimal or to send the data from the CPU to an output channel Note The ON OFF state of discrete inputs and outputs is represented by a 1 or 0 value assigned to an individual bit in a 16 bit data word This is sixteen Ox or 1x references per data word With respect to mapping the LSB of the word maps to the lowest numbered channel of a group and channel numbers increase sequentially as you move towards the MSB Unused bit positions are set to zero All I O values are accessed via the 16 bit Input Registers or 16 bit Holding Registers given in the Register Map Input registers contain information that is read only For example the current input value read from a channel or the states of a group of digital inputs Holding registers contain read write information that may be configuration data or output data For example the high limit value of an alarm function operating at an input or an output value for an output channel Each module has a default factory configuration as noted in the SPECIFICATIONS section Your application will likely differ from the default configuration and the module will need to be reconfigured You may reconfigure this module by issuing the appropriate Modbus functions to Register Map regist
13. After reset these registers read 0 outputs OFF and these registers are not maintained in EEPROM 1x References Read Only 10001 0 11 12 Discrete Thru 0000 Inputs 0 11 10012 000B 983EN amp 981EN Only Note This signal reflects the actual state of the corresponding input signal 981EN amp 983EN or the drain of the tandem output 983EN This signal is active low Failure to install I O pullups or provide port excitation will leave inputs floating Discrete Input Value Addresses a specific bit of a 16 bit word that monitors the ON OFF status for the input or tandem output O OFF 1 ON The bit position corresponds to the input channel number i e input 0 uses bit 0 of the 16 bit word at address 0 input 1 uses bit 1 of the 16 bit word at address 1 etc Unused bits of a word are set to 0 A set bit 1 means the input is ON active low A clear bit 0 means the input is OFF high Bits 15 12 0 Not Used Additionally unused bits in range 11 0 are set to 0 Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 2 F Description Data Type Format Register Map Input Registers 3x References Read Only Model 983EN 4012 30001 0000 Module Bit 15 0 Not Used Status Bit 14 Wink Mode Flag 1 Wink Mode Blinks Run LED for ID 0 Normal Operation See
14. DC voltage and current sinking 982EN amp 983EN Only applications only Outputs have built in transient protection Sockets are provided at each port four channels for quick replacement and installation of SIP resistor networks that serve as pullups to the port EXC supply terminal 5 6K pull up resistor SIP s are installed from the factory Output OFF Voltage Range 0 to 35V DC Limit voltage to 35V or less or damage to the unit may result Output OFF Leakage Current 0 1uUA typical 501uA maximum mosfet only 25 C 35V Does not include the tandem input bias current of 983EN models see below Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 30 BusWorks 981 982 983EN Module User s Manual Digital Outputs 982EN amp 983EN Only To control higher voltages and or currents or for controlling AC an interposing relay may be used see Note General Specifications Note Do not allow EXC or unused inputs to float If pull ups are installed this will cause one I O signal to pull the other floating port channels via the pull ups and common EXC lead connection Enclosure and Physical Modbus TCP IP Digital I O Note 983EN The 100KQ series input buffer resistors in combination with the 5V voltage clamps at the input buffers will tend to increase the off state drain current with increased drain voltage up to 0 3mA at 35V This is due to the fact tha
15. DHCP refers to Dynamic Host Configuration Protocol and is a method used to assign temporary numeric IP addresses as required A DHCP server maintains a pool of shared IP addresses which are dynamically assigned and recycled When a DHCP device wants to use a TCP IP application it must request an IP address from the DHCP server The DHCP server will check the shared supply and if all addresses are in use the server will send a busy signal to the client which tells it to try again later Static IP addresses will ensure a connection every time but dynamic addresses do not DNS refers to the Domain Name System or Domain Name Server and refers to the system used to associate an alphanumeric character string with a numeric IP address The DNS is actually a distributed database of domain names and corresponding IP addresses These servers contain information on some segment of the domain name space and make this information available to clients called resolvers For example the DNS allows us to use Acromag com as an IP address rather than a complicated number string Modbus registers are organized into reference types identified by the leading number of the reference address Read Write Discrete Outputs or Coils A Ox reference address is used to drive output data to a digital output channel Read Discrete Inputs The ON OFF status of a 1x reference address is controlled by the corresponding digital input channel Read Input Registers
16. HHH O gt PORT 2 SIP R11 INSTALLED IN X3 s THE SIP IS AN ISOLATED RESISTOR NETWORK OF 4 ELEMENTS ot 1 FACTORY SIP VALUE IS 5 6K OHMS ze PORT 1 PORT 0 POWER IS 0 5W PER ELEMENT GEESE Sus cu gigerien gt H THE EVEN NUMBERED PINS OF apon onoono a ce ape j THE SOCKETS ARE TIED TO THE Lal U PORT EXCITATION TERMINAL IS oi wae PULLUPS ARE LOCATED IN SOCKETS WHEN REPLACING SIPS OR CHANGING VALUES WATCH WADADA TADAA ON PLUG IN I O BOARD AS SHOWN HERE THAT POWER DISSIPATION 1_ DOES NOT EXCEED SIP RATING EXC PORTO RTN EXC PORT1 RTN WHEN REPLACING COVER ALIGN ALL PINS THEN SNAP TOGETHER IN SEQUENCE TO SECURE COVER USE SMALL SCREW DRIVER TO PRY OFF SIDE COVER COVER IS HELD IN PLACE 981EN 982EN 983EN SHOWN WITHEIGHT SNAP PINS CAUTION HANDLE CIRCUIT WITH SIDE COVER REMOVED CAREFULLY SEPARATE USING ESD SAFE PROCEDURES AND I O BOARD SEPARATED VO BOARD FROM BASE BOARD To Remove or Replace Factory Pullup Resistors Locate pullup resistor SIP s installed in sockets of plug in I O board as shown above You must remove the right side cover and separate the two boards to remove or install these resistors 5 6K resistor SIP s are installed from the factory Remove these resistors if I O channels are pulled up externally Limit power in each SIP resistor to less than 0 5W When attaching the module to the T type DIN rail angle the top of the unit towards the rail and locate the top groove of the adapter over
17. is automatic MDI MDI X CAARAAR RARRRR A s crossover use of a direct straight through JA The ethernet port of these or crossover cable is permissible ay i a iy modules are not automatic MDI MDI X crossover but the use of an auto crossing i CAT 5 UTP CABLE switch eliminates the need IMPORTANT IF THE HOST PC CONNECTS DIRECTLY TO THE MODULE UP To 100 METERS to make a distinction between YOU MUST USE A CROSS CONNECT CABLE MDI X AS BOTH THE PC straight through and crossover AND THE 9XXEN MODULE ETHERNET PORTS ARE WIRED MDI Na a pts 9 Straight Through or Crossover Cable i ETHERNET SWITCHES AND HUBS ARE WIRED MDI X THE ACROMAG ETHERNET SWITCH IS AUTOMATIC MDI MDI X AND Order Acromag Cable Model 5035 355 ELIMINATES THE NEED FOR MAKING A DISTINCTION BETWEEN THE USE OF STRAIGHT THROUGH MDI AND CROSSOVER MDI X CAT 5 UTP CABLE CABLE CONNECTIONS UP TO 100 METERS Straight Through or Crossover Cable Acromag offers a straight through patch cable Model 5035 355 or a crossover cable Model 5035 360 for use with Series 9xxEN modules CAT 5 UTP CABLE L UP TO 100 METERS Straight Through or Crossover Cable CAT 5 UTP CABLE UP TO 100 METERS i Straight Through or Crossover Cable J Power Y Connect 15 36V DC to the power terminals labeled DC amp DC Observe proper polarity For supply connections use No 14 AWG wires rated for at least 75 C CAUTION Do not exceed 36VDC peak Voltage Current
18. the upper lip of the rail Firmly push the unit towards the rail until it snaps into place To remove first separate the input terminal block s from the PWR bottom side of the module to create a clearance to the DIN mounting area Next while holding the module in place from above insert a screwdriver into the lower arm of the i E DIN rail connector and use it as a Firewire Alaa a a 26 lever to force the connector down eat iei until the unit disengages from the rail do not twist the screwdriver to avoid damaging plastic PUSH MODULE REMOVAL y USE YOUR FINGER TO APPLY FROM DIN RAIL ee DOWNWARD PRESSURE HERE TO REMOVE IT FROM RAIL DPW DAP 46 45 44 43 42 41 T TYPE DIN RAIL Any Series 9XXEN Ethernet Module Remove Terminal Blocks On This Side To Provide Clearance PRY WITH SCREWDRIVER INSERTED IN SLOT HERE DO NOT TWIST TO AVOID DAMAGING PLASTIC TAB PUSH SCREWDRIVER AS SHOWN TO TILT AND LIFT MODULE OFF RAIL Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com AS YOU LIFT AND TILT MODULE BusWorks 981 982 983EN Module User s Manual RJ45 MDI AND MDI X CONNECTIONS MDI WIRING MDI X WIRING Transmit Receive Transmit Receive Receive Transmit Not Used Not Used Not Used Not Used Receive Transmit Not Use
19. to the IP Address of the gateway if your local area network happens to be isolated by a gateway Typically it is assigned the first host address in the subnet If a gateway is not present then this field should contain an unused address within the host subnet address range Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 1 3 The Host Name is the name to be assigned to this host if its address WEB BROWSER happens to be assigned dynamically using DHCP The Active IP Address refers to the current IP Address being used by this Network Configuration host as opposed to any new assignments being made via this page The MAC Address refers to the Media Access Control Address that uniquely identifies the hardware of this device This is a unique fixed address assigned to this module at the factory In IEEE 802 networks the Data Link Control DLC layer of the OSI Reference Model is divided into two sublayers the Logical Link Control LLC layer and the Media Access Control MAC layer The MAC layer interfaces directly with the network media each different type of network media requires a different MAC layer By default the module is setup to use Static IP Addressing and a Static IP Address of 128 1 1 100 You can optionally choose to have the IP address assigned dynamically via DHCP BOOTP or DHCP BOOTP w Fallbacks This
20. to the last IP address of a subnet is sent to every host on the subnet Subnets are further broken down into three size classes based on the 4 octets that make up the IP address A Class A subnet is any subnet that shares the first octet of the IP address The remaining 3 octets of a Class A subnet will define up to 16 777 214 possible IP addresses 2 2 A Class B subnet shares the first two octets of an IP address providing 2 2 or 65534 possible IP addresses Class C subnets share the first 3 octets of an IP address giving 254 possible IP addresses Recall that the first and last IP addresses are always used as a network number and broadcast address respectively and this is why we subtract 2 from the total possible unique addresses that are defined via the remaining octet s For our example the default IP address of this module is 128 1 1 100 If we assume that this is a Class C network address based on the default Class C subnet mask of 255 255 255 0 then the first three numbers represent this Class C network at address 128 1 1 0 the last number identifies a unique host node on this network node 100 at address 128 1 1 100 A Subnet Mask is used to determine which subnet an IP address belongs to The use of a subnet mask allows the network administrator to further divide the host part of this address into two or more subnets The subnet mask flags the network address portion of the IP address plus the bits of the host pa
21. will also require that you specify a valid Host Name Note that DHCP BOOTP w Fallback will revert to the static IP address if your DHCP or BOOTP server cannot be found at the address specified In general BOOTP BOOTsitrap Protocol refers to an internet protocol that enables a diskless workstation to discover its own IP address the address of a BOOTP server on the network and a file to be loaded into memory to boot the machine This enables the workstation or device server to boot without requiring a hard or floppy disk drive BOOTP works similar to DHCP but is usually found in older systems This protocol is defined by RFC 951 DHCP Dynamic Host Configuration Protocol refers to a protocol for assigning dynamic IP addresses to devices on a network With dynamic addressing a device can have a different IP address every time it connects to the network In some systems it can even change while it is still connected DHCP also supports a combination of static and dynamic IP addresses DHCP BOOTP with fallback will revert to static IP addressing if the DHCP or BOOTP server cannot be found The unit includes a default address toggle switch to cause the module to The Default Communication assume a fixed default static IP address 128 1 1 100 This switch is at the Mode uses a Static IP address front of the module and is used to toggle the module into or out of Default of 128 1 1 100 a default Mode If you use the toggle switch at the fr
22. wired MDI If you are connecting to an Ethernet switch or hub then a direct cable is used Note If your Link LED is ON you have connected using the correct type of cable but it could still be defective Wrong IP Address Is cable segment longer than 100M Change the IP address of the module or the PC so that both match Try the default module address of 128 1 1 100 Max distance between two nodes is limited to 100 meters with approved cable If your problem still exists after checking your wiring and reviewing this information or if Correct Cable other evidence points to another problem with the unit Shielded CAT 5 5E cable or equivalent is recommended Missing earth ground connection Missing excitation connection an effective and convenient fault diagnosis method is to exchange the module with a known good unit Acromag s Application Engineers can provide further technical Connect earth ground to TB3 33 GND terminal adjacent to power terminal Connect an excitation supply between the port EXC and RTN terminals Missing pull up resistors Your browser may be setup to use a proxy server for LAN communications assistance if required Complete repair services are also available from Acromag Install SIP resistor in socket of board for port of interest or pullup outputs externally Temporarily disable the use of a proxy server by your browser see procedure o
23. 3V f TRANSFORMER E TKJ 981 982 983EN ax 3i 6 ISOLATION g DIAGRAM m DIGITAL IN or OUT DIGITAL IN or OUT 5ersoz J reenrng ESSSE glo FS SSE r 11 12 13 14 15 16 K 21 22 23 24 25 26 AAAARA RARARARAAA T OCOS COSC TB1 TB2 DIGITAL VO DIGITAL VO MOUNTING AND DIMENSIONS Unit mounts to T type DIN rails 35mm type EN50022 Units may be mounted side by side on 1 inch centers WARNING IEC Safety Standards may require that this device be mounted within an approved metal enclosure or sub system particularly for applications with exposure to voltages greater than or equal to 75VDC or 50VAC CONTROLS amp INDICATORS Green Run LED is ON if power is on and will blink in wink ID mode Yellow ST LED blinks ON OFF slowly if module is in default communication mode and blinks rapidly if a watchdog timeout has occurred Yellow I O LED s turn ON if corresponding output switch is closed or input asserted low Green LINK LED ON if auto negotiation has successfully established a connection Yellow ACT LED signals PHY network Activity busy ISOLATION BARRIERS Dashed Lines denote isolation barriers The I O circuit network and power circuit are isolated from each other for safety and noise immunity Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 4 BusWorks 981 982 983EN Module User s Manual 1O PULLUP RESISTOR INSTALLATION
24. 4 and Category 5 The differences in classification is found in their electrical performance and this is documented in the TIA EIA 568A standard Category 5 cable includes four twisted wire pairs at eight twists per foot This device is designed for use in harsh industrial environments Acromag recommends the use of shielded cable when wiring to this device Select STP Shielded Twisted Pair cable rather than UTP Unshielded Twisted Pair The use of shielded cable will help protect the data being transmitted from harmful EMI Electromagnetic Interference and RFI Radio Frequency Interference It will also help to lower your radiated emissions by keeping the cable from emitting EMI and RFI There are two types of cable solid cable and stranded cable Stranded cables are more flexible than solid cables But since attenuation is higher for stranded cables than solid conductor cables these are generally reserved for short runs and patch applications less than 6 meters Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 34 BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O ACCESSORY CABLES Patch Cable amp Crossover Cable Currently there are two types of shielding employed in Category 5 STP cable single shielded cable and double shielded cable Both of these cables have the same core and jacket as UTP cables but also include a thin foil outer shield that covers all
25. 8 Introduction to Modbus Windows is a registered trademark of Microsoft Corporation IMPORTANT SAFETY CONSIDERATIONS You must consider the possible negative effects of power component wiring sensor or software failure in the design of any type of monitoring or control system This is very important where property loss or human life is involved It is important that you perform satisfactory overall system design and it is agreed between you and Acromag that this is your responsibility GETTING STARTED MOUNTING AND DIMENSIONG 0 ceeeeeeee 3 CONTROLS amp INDICATORG 2 0cceseeceeeeeeeeeeeees 3 ISOLATION BARRIERG 0 cs eecseeeeeeeeeeeeeeeenees 3 1 0 PULLUP RESISTOR INSTALLATION 4 CONNECTIONG 0cceceeceeeeeeeeeeeeseeeesaeeeeaeeaeeees 4 DIN Rail Mounting And Removal 5 4 NOt WOKK serenon 5 POWO oanrinne 6 Digital INputs cceeceeeeeeeeeeeeeeeeeeeeeeenes 7 Digital Outputs issecce secede tiene des eeteecenceeeee 8 Earth Ground ccecs sccesececsceeeeecteceetesuveceerteemes 9 WEB BROWSER 6 cesses sccecnsencenceedeneeteenen aa 10 Home PAGO owais nics ctcinwics niiina NaRa RENA 10 Password Configuration Page 0s00 11 Network Configuration Page 0 sss0 11 I O Mapping Page Optional i20 Function 14 Test PAQC wa ionic cess encceeects nnmnnn innana an a 15 TROUBLESHOOTING cececeeeeeeeeeeeeeeeeeeeeeeeeee 17 Diagnostics Table
26. 981 982 983EN modules A host is any device on any network On TCP IP networks each host has IP Addressing one or more unique IP addresses This module connected to an ethernet network is a host An IP Address is a unique identification number for any host this module on any TCP IP network including the internet The IP address is made up of four octets 8 bits each octet having a value between 0 255 OQOH FFH The IP address is comprised of two parts the network address first part and the host address last part The number of octets of the four total that belong to the network address depend on the Class definition see below Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 2 2 BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O IP Addressing TIP The first node 0 node 10 and the last node 255 for our example are typically reserved for servers and may yield poor results if used A Static IP Address is as the name implies static That is it is a unique IP Address that is assigned by a service provider and never changes A Dynamic IP Address is an address that is temporarily assigned to a user by a service provider each time a user connects A Subnet is a contiguous string of IP addresses The first IP address in a subnet is used to identify the subnet while the last IP address in a subnet is always used as a broadcast address Anything sent
27. Acromag 4 BusWorks 900EN Series Modbus TCP IP 10 100MB Industrial Ethernet I O Modules Model 981EN 4012 12 Active Low Digital Inputs Model 982EN 4012 12 Sinking Digital Outputs Model 983EN 4012 12 Tandem Digital Input Output USER S MANUAL a pase Cans ee ler rte ACROMAG INCORPORATED 30765 South Wixom Road P O BOX 437 Wixom MI 48393 7037 U S A Tel 248 624 1541 Fax 248 624 9234 Copyright 2003 Acromag Inc Printed in the USA Data and specifications are subject to change without notice 8500 717 GO9M001 2 BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O TABLE OF CONTENTS Symbols on equipment A Means Refer to User s Manual this manual for additional information The information of this manual may change without notice Acromag makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Further Acromag assumes no responsibility for any errors that may appear in this manual and makes no commitment to update or keep current the information contained in this manual No part of this manual may be copied or reproduced in any form without the prior written consent of Acromag Inc For additional information please visit our web site at www acromag com and download our whitepaper 8500 765 Introduction To Modbus TCP IP or 8500 64
28. FFH to this register to leave the outputs unchanged following a timeout this is also the default value Wink Module Toggle Register Write 21845 5555H to this register to cause the module to wink its green Run LED in order to ID the module Write the same value a second time to stop winking This register will always read back as OOOOH Use the Module Status Register wink mode flag bit 14 to determine the wink state Reserved Do Not Use Reserved Do Not Use Digital Inputs 981EN and 983EN Only Bit field Read Only The 12 lower order bits of this field correspond to the states of channels 0 11 with the bit position corresponding to the channel number Digital Outputs 982EN and 983EN Only This block Mirrors 1XXXX Registers Bit field Read Write the 12 lower order bits of this field correspond to channels 0 11 with the bit position corresponding to the channel number Refer to Register Mirroring 1xxxx Input Status Registers are mapped to the 41xxx Holding Register space using an address offset of 41000 This block Mirrors 0XXXX Registers Refer to Register Mirroring Oxxxx Coil Registers are mapped to the 42xxx Holding Register space using an address offset of 42000 This block Mirrors 3XXXX Registers Refer to Register Mirroring 3xxxx Input Registers are mapped to the 43xxx Holding Register space using an address offset of 43000
29. H compatible Limit Input Voltages to 35V maximum RTN Vv Note Do not allow EXC or unused inputs to float If pull 983EN SIMPLIFIED INTERNAL I O DIGITAL INPUT CONNECTIONS CONNECTIONS ONE CHANNEL ups are installed this will cause one I O signal to pull the y N a 3 iie other floating port channels via SI Dile cuo8 Bi IN SOCKET the pull ups and common EXC LON Spe SHIELDED CABLE z 100K lead connection H 2 cHos E gt S KOR ine S S RTN A Io OPEN I TB1 Xk E COLLECTOR OR DRAIN e PS Vv Refer to the examples below for examples of other types of input connections DRY CONTACT RELAY CONNECTIONS NORMALLY OPEN Normally Open Dry Contact 981EN amp 983EN Oee a EXC SIPINSTALLED 5V 5 6K OTHER THREE N CHAN OF PORT 100K al V S ad DO liji 5 D BLOMY fel TS no 4 983EN CHW ADJUST VOLTAGE V AS Relay REQUIRED TO CHANGE EXCITATION CURRENT OR CHANGE SIP RESISTOR VALUE CH LED IS ON FOR ACTIVE LOW INPUT ON 983EN UNITS MAKE SURE OUTPUT IS OFF 0 FOR INPUT ONLY APPLICATIONS DRY CONTACT RELAY CONNECTIONS NORMALLY CLOSED 981EN amp 983EN 32 SIP INSTALLED 5V EXC E D 5 6
30. ING RELAY L EARTH GROUND PULLUP IN SOCKET 100K e gt pH IMPORTANT Add Protection With Inductive Loads Outputs already include internal reverse bias shunt diodes to help protect the output switch from damage due to the high reverse bias voltages generated when switching inductive loads You should add external protection near the inductive load to prevent these transients from being sent along the connection wires Place a diode 1N4006 or equivalent across an inductive load with the cathode to and the anode to Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O Q CONNECTIONS Refer to the examples below for other types of output connections SOLID STATE RELAY SSR OR LED DRIVER TO A LOAD LINE EXC 983EN A SIP RESISTOR v R INSTALLED SSR IN SOCKET N O Re 4 LED Tle rl a CHAN OF PORT 100K OFF aY gt _ y O e TO LOAD LINE xy _ SBEN iam CH PiLT lor SHH l RTN Vv RELAY COIL SOLENOID DRIVER EXC 983EN N eee 6K SIP RESISTOR INSTALLED V H IN SOCKET L 1N4006 TOO 5 35V VO THER 3 ON CHAN OF PORT 100K lore v Y o gt O R 982EN 983EN ta ON PLT lor HO
31. K HT S VO OTHER THREE CHAN OF PORT 100K I Vv RTN Normally Closed Dry Contact Relay ADJUST VOLTAGE V AS REQUIRED TO CHANGE EXCITATION CURRENT I OR CHANGE SIP RESISTOR VALUE CH LED IS ON FOR ACTIVE LOW INPUT ON 983EN UNITS MAKE SURE OUTPUT IS OFF 0 FOR INPUT ONLY APPLICATIONS Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 8 CONNECTIONS Digital Inputs 981EN amp 983EN Only Digital TTL Logic Monitor Note Do not allow EXC or unused inputs to float If pull ups are installed this will cause one I O signal to pull the other floating port channels via the pull ups and common EXC lead connection Digital Outputs 982EN amp 983EN Only Outputs are the open drains of DMOS mosfet switches for DC current sinking applications only Outputs turn OFF open following a software or power on reset of the module BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O LOGIC TTL MONITOR 981EN amp 983EN ONLY EXC 981EN or 983EN YQ Oe 56x SIP RESISTOR 5V INSTALLED IN SOCKET ry on R TO OTHER 3 ON r LIM CHAN OF PORT 100K lore OFF gt o 9S o gt O Z 5V 1 0 R RLIM IS INCLUDED TO PROTECT DRIVER IF 983EN P TANDEM OUTPUT IS xy LG ON CH D INADVERTANTLY
32. Modbus TCP IP Digital I O 1 5 Each input port of this device may be mapped to the same port of another Acromag 982 983EN 4012 digital I O module different IP address WEB BROWSER Subsequent messages will be sent at a periodic rate specified via the update time Note that the target output port channels may still be controlled I O Mapping Page independently but their state will be overwritten by subsequent mapped Optional i20 Function messages when enabled Itis recommended that you do not control the mapped output ports directly Change of State Set ON to enable output updates on change of input state and OFF to update cyclically With change of state enabled you will still have to specify an update time less than or equal to 90 seconds in order to keep the communication socket open and prevent a timeout of the connection If you select 0 seconds with change of state enabled a default value of 30 seconds will be used to ensure the connection remains open Invert Sent Data Select Yes to invert the port data before sending it to the destination port Select No to send the actual states of the port channels Update Time Specify a time from 0 90 seconds between messages Specify 0 to turn i20 messaging OFF cyclical If change of state is set to ON a default time of 30 seconds will be used to keep the connection open Map To IP Address This is the Static IP Address of the target output device another 982 983EN module on th
33. PUT Ethernet Port Includes A ESD Protection H ON H 3 ei RJ45 ETHERNET Z CONTROLLER n VRAM OPEN DRAIN OUTPUT SRAM N 512Kx8 L ON 3 3V gt gt l x lore FLASH ee ee GND 512Kx8 v v 982EN 983EN 982EN Or lt gt OUTPUT BLOCK ISOLATED INPUT POWER 5 15 36VDC VO STATUS LED CH vO 5V TOGGLE poweR amp 3 ISOLATED lt 9 2c O SWITCH FLYBACK a I W VO LOGIC 33V SWITCHER DC E 3 3V POWER z k R lt gt Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 2 1 TCP IP refers to Transmission Control Protocol and Internet Protocol ABOUT MODBUS TCP IP allows blocks of binary data to be exchanged between computers TCP IP is everywhere and is the foundation for the World Wide Web The TCP IP primary function of TCP is to ensure that all packets of data are received correctly while IP makes sure that messages are correctly addressed and routed Note that the TCP IP combination does not define what the data means or how the data is to be interpreted it is merely a transport protocol You can find more information Modbus is an application protocol It defines rules for organizing and on Modbus TCP IP by visiting interpreting data and is essentially a messaging structure that is independent our web site and down loading of the underlying physical layer It is freely available and ac
34. Wink Module Register Bit 13 Default Mode Flag 1 Default Mode Indicator 0 Not Default Mode Bits 12 3 0 Not Used Bit 2 Port 2 CH 8 11 1 Port 2 Watchdog Fault Bit 1 Port 1 CH 4 7 1 Port 1 Watchdog Fault Bit 0 Port 0 CH 0 3 1 Port 0 Watchdog Fault Registers 4x References Read Write 0 Port 0 Can be set from 1 to 65534 seconds Note Changes to Holding 0000 CHO 3 Registers take effect Watchdog Set to 65535 FFFFH or 0 0000H to immediately Time disable the watchdog timer Default 0 Disabled Port 1 Can be set from 1 to 65534 seconds CH 4 7 Watchdog Set to 65535 FFFFH or 0 0000H to Time disable the watchdog timer Default 0 Disabled Port 2 Can be set from 1 to 65534 seconds CH 8 11 Watchdog Set to 65535 FFFFH or 0 0000H to Time disable the watchdog timer Default 0 Disabled Port 0 The four lower order bits of this 16 bit Note A port timeout can only CH 0 3 register value define the state the output be cleared via a read or write Timeout channels of the port will be programmed to any channel of the same State to following a watchdog timeout Bit 0 port or upon a software or 982EN and corresponds to channel 0 bit 1 to power on reset of the module 983EN Only channel 1 bit 2 to channel 2 and bit 3 to channel 3 Write 65535 FFFFH to Default this register to leave the outputs 65535 unchanged following a timeout this is Disabled also the default value
35. You must connect excitation and or install pull ups for proper I O operation I O terminals must not be left floating 5 6KQ I O pull up resistors are already installed from the factory You do not need to refer to this information unless you need to change or remove these resistors If your application delivers power to the I O terminals rather than the excitation terminal the internal pull ups should be removed to avoid coupling current into adjacent port channels CONNECTIONS DIN Rail Mounting amp Removal Modbus TCP IP Digital I O 5 6K x4 ISOLATED 0 5W RESISTORS SERIES 981PB 982PB 983EN SIP PORT 2 RTN CH8 11 EXC RESISTOR BOURNS 4308H 102 562 PULLUP RESISTOR SOCKET LOCATION NETWORK OR EQUIVALENT BAADAE BAADT P o O L Acromag U AA soeker TOT mo RUN oon OOst EACH PORT HAS A SIP RESISTO EEEF LOCATED AS SHOWN AT RIGHT SIP RESISTORS PULL UP THE I O B4567 CHANNEL TO THE EXC SUPPLY Ap 6 G09 BASE BOARD PLUG IN I O BOARD soon SIPS ARE INSTALLED IN SOCKETS 5 C009 X1 X2 AND X3 umed Face Up EE QOact PORT 0 SIP R2 INSTALLED IN X1 LINK PORT 1 SIP R7 INSTALLED IN X2 aie finnes EE HHHH
36. able and shielded RJ45 plugs from the following vendors e L com Connectivity Products www L com com see cable model TFSC2004 and shielded plug T8P8CSR e Regal Electronics www regalusa com see shielded plug model 1003B 8P8CSR C5 Complete premium double shielded Category 5e standard and crossover cables in variable lengths can be obtained from Lumberg at www lumbergusa com refer to their etherMate line For example specify RJ45S RJ45S 656 B 3M for a double shielded 3 meter straight cable Specify RJ45S RJ45S 656 BX 3M for a double shielded 3 meter crossover cable Notes Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com
37. aracters case sensitive to specify your username and 10 alphanumeric characters case sensitive to specify a password You will have to type in these entries twice to help prevent errors Click the submit button to write your changes to the module After completing your username password changes click on the appropriate button at the bottom of the page to select another web page If you made changes you may be prompted to re enter your new username and password before being permitted to move to other pages After setting your username and password you can click the Network WEB BROWSER Configuration Page button and a screen similar to that shown on the following page will appear Use this screen to set the network configuration parameters for your module You may have to consult your network Network Configuration administrator to complete the contents of this page An IP Address is a unique identification number for any host this module on any TCP IP network including the internet The IP address is made up of four octets 8 bits each octet having a value between 0 255 00H FFH It is expressed here in decimal form with a period placed between octets A Static IP Address is as the name implies static and represents a unique fixed IP Address that is generally assigned by your service provider or system administrator The Default Mode static IP address assigned to this module is 128 1 1 100 refer to product side label
38. assword00 respectively After entering these defaults you may wish to invoke the Password Configuration Page to change these parameters to something more meaningful for you Connect to 128 1 1 100 IMPORTANT If you forget your user name and password Kan you can always toggle the A module into default mode via the default mode toggle switch at the front of the module and _ the password and username User name G M will revert to the original defaults noted above thus allowing you to re invoke the Cl Remember my password Password Configuration Page and change the username and password as required 983EN 4012 Password Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 1 1 Password Configuration Page Microsoft Internet Explorer BAXI File Edit View Favorites Tools Help ay WwW E B B R OWS E R Qax x 2 O O seah she Favorites 2 S H WaS hetp 128 1 1 100 password shtml ma Bi y Eco tn Password 983EN 4012 Password Configuration Page Confi gu ration Page New Username and Password name password Verify Username and Password name password Test Page F Network Configuration Page f O Mapping 1 Home Page Copyright 2003 2005 Acromag Inc All rights reserved 2 Internet Use up to 20 alphanumeric ch
39. cations It is recommended that you use a crossover CAT 5 cable to connect this device to your PC For 10Base T systems you may use Category 3 Category 4 or Category 5 5E UTP STP cable In either case you are limited to 100 meters between any two devices A crossover cable simply connects the differential transmit pair on each end to the receive pair on the opposite end Use a standard direct cable when connecting to a hub or switch port which are generally wired MDI X SooF Acromag 983EN 4012 2 go80 Ethernet Module 360 The ethernet port of this module is not automatic MDI MDI X crossover and is wired MDI Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 6 BusWorks 981 982 983EN Module User s Manual CONNECTIONS available from Acromag and other vendors Network Modbus TCP IP Digital I O Refer to the Accessory Cables section at the back of this manual for more information on accessory cables including patch and crossover cables TIP You can significantly enhance the EMI RFI performance of your network connections by using Category 5E STP cable Shielded Twisted Pair with shielded RJ45 plug connectors This will also help to protect your installation from damage due to ESD Electro Static Discharge The use of shielded cable is strongly recommended for installations in harsh i
40. cessible to whitepaper 8500 765 anyone easy to understand and widely supported by many manufacturers Introduction To Modbus TCP IP Modbus TCP IP uses TCP IP and Ethernet to carry the data of the Modbus message structure between devices That is Modbus TCP IP combines a physical network Ethernet with a networking standard TCP IP and a standard method of representing data Modbus A Modbus TCP IP message is simply a Modbus communication encapsulated in an Ethernet TCP IP wrapper In practice Modbus TCP embeds a Modbus data frame into a TCP frame sans the Modbus checksum as shown in the following diagram The Modbus checksum is not used as the standard ethernet TCP IP link layer checksum methods are instead used to guaranty data integrity TCP FRAME Transaction Identifier Protocol Identifier Length Field Modbus Frame a Modbus Checksum Not Included cos rams on Ow Ex End MODBUS FRAME Note that the Modbus address field is referred to as the Unit Identifier in Modbus TCP Ina typical slave application the Unit ID is ignored and just echoed back in the response The operation of the 981 982 983EN industrial Ethernet modules is very similar to Acromag s 901 902 903MB ModBus modules The operation over Ethernet is essentially transparent to the Modbus register command structure If you are already familiar with Modbus or with Acromag Series 900MB modules then you are already familiar with the operation of the
41. d However to later restore your PC s connection to your company network you may have to re enable the use of a proxy server for your LAN There is no built in error detection to prevent you from writing invalid values to a configuration register As such if you inadvertently write an invalid value to an internal register you could cause the module to become inoperable under certain conditions If this happens in order to regain control of the module the module can either be re downloaded at the factory or you can try restoring the module to its initial configuration by following this procedure Procedure For Restoring any 9xxEN Module to its Initial Configuration 1 While module power is OFF press and hold the front panel toggle switch in the default DFT left position 2 While continuing to hold the toggle switch in the default position apply power to the module 3 After a few seconds the Status LED will begin to blink quickly and you can release the default switch at this point The module will continue to boot itself as it normally does That is the green RUN LED will blink for 1 10 seconds as the unit acquires its address then remain ON for normal operation 4 Ifthe STATUS LED fails to blink rapidly after a few seconds and the RUN LED just blinks for a few moments as it normally does then reinitializing the module has failed and you should try it again This time make sure that the DFT switch is completely depressed and h
42. d 20000 respectively The full range is 163 84 32768 decimal to 163 835 32767 decimal Temperature A 16 bit signed integer value with resolution of 0 1 C Isb For example a value of 12059 is equivalent to 1205 9 C a value of 187 equals 18 7 C The maximum possible temperature range is 3276 8 C to 3276 7 C Discrete A discrete value is generally indicated by a single bit of a This Model 16 bit word The bit number position typically corresponds to the discrete channel number for this model Unless otherwise defined for outputs a 1 bit means the corresponding output is closed or ON a 0 bit means the output is open or OFF For inputs a value of 1 means the input is ON Active low near OV while a value of 0 specifies the input is OFF or in its high state usually gt gt OV Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 2 6 BusWorks 981 982 983EN Module User s Manual Register Map Model 983EN 4012 Modbus TCP IP Digital I O The following table outlines the register map for the Model 983EN 4012 network I O module The same register map is used for sub models 981EN 4012 and 982EN 4012 and some registers will not apply to the sub models The Modbus functions operate on these registers using the data types noted above except for the Reset Slave and Report Slave ID functions Note that this register map is very similar to the register map of Ac
43. d Not Used Not Used Not Used ETHERNET PORT COIN o1 BR O O P RJ 45 CONNECTOR Note Crossover Connections MINIMUM RECOMMENDED CABLE 10Base T 100M CAT 3 CAT 4 or CAT 5 UTP STP 100Base T 100M CAT 5 UTP STP The Ethernet port of this module is wired MDI and does not include automatic crossover The Ethernet port of your PC is also wired MDI and may not include automatic crossover As such you must use a crossover cable like that shown below when connecting this device directly to a PC CROSSOVER CABLE FOR MDI TO MDI CROSSOVER OR MDI X TO MDI X CONNECTIONS RJ45 Clip Side Down RJ45 Clip Side Down 1 8 1 8 FOR DIRECT PC TO ETHERNET MODULE PINS 1TO3 CONNECTIONS 2TO6 3TO1 6TO2 HOST PC CONNECTED DIRECTLY TO A MODULE Note This MDI to MDI connection requires the use of a crossover cable CAT 5 UTP CABLE UP TO 100 METERS HOST PC 2 2 es Use Crossover Cable Order Acromag Cable Model 5035 360 Modbus TCP IP Digital I O 5 CONNECTIONS Network For 100Base TX systems at a minimum use data grade Unshielded Twisted Pair UTP wiring that has a 1000 characteristic impedance and meets the EIA TIA Category 5 wire specifi
44. digital inputs instead of getting 2 bytes returned with the first 12 bits representing the 12 digital inputs you will get 12 separate words each set to either 0000H OFF or FFFFH ON For the Oxxxx Coil Registers reads are handled in the same way as the 1xxxx Input Status Registers You can also write to the coil registers by using the Preset Single Register function with an address offset of 42000 Setting the data to OOOOH will turn the coil OFF while setting the data to FFOOH will turn the coil ON Writing to multiple coils is not supported via register mirroring you must use the Write Multple Coils function for that Note that with respect to the Acromag 9xxMB Modbus RTU modules only the 3xxxx Input Registers are mirrored into 4xxxx space not Coil or Input Status registers as noted here for 9xxEN models I O values for Series 900EN modules are represented by the following Data Types simple data types for temperature percentage and discrete on off Summary Of Data Types Used By 900MB 900EN Modules Data Types Description Count Value A 16 bit signed integer in range of 32768 to 32767 or unsigned integer in range of 0 to 65535 representing an A D or DAC count time value or frequency Percentage A 16 bit signed integer value in range of 32768 to 32767 20000 is used to represent 100 yielding a resolution of 0 005 Isb For example 100 0 and 100 are represented by decimal values 20000 0 an
45. e accessories for use with this module Cable Model 5035 355 A yellow 3 foot long single shielded Category 5e STP patch cable with drain wire and an RJ45 plug at both ends Use this cable to connect an Acromag 9xxEN I O module to the Acromag 900EN S005 switch Cable Model 5035 360 A green 5 foot long single shielded Category 5e STP crossover cable with a drain wire and an RJ45 plug at both ends This cable performs the Ethernet crossover function and is used to connect a PC directly to an Acromag Series 9xxEN I O module Note that you do not need to use a crossover cable to connect your PC to this module if the Acromag 900EN S005 switch is used between the PC and module as the switch is auto crossing However you must use a crossover cable when directly connecting your PC to a Series 9xxEN I O Module without the use of an auto crossing switch or hub Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 3 D You may obtain cable in other lengths and colors as required for your Patch Cable amp application from other vendors For example shielded CAT 5e cable is Crossover Cable available from the following vendors e L com Connectivity Products www L com com e Pro Link www prolink cables com For very noisy environments or in the presence of strong electrical fields you can obtain double shielded CAT 5e c
46. e network Each digital input port may be mapped to the same port at one IP address Note that if you perform the procedure for restoring a module to its original configuration as outlined in the Getting Out Of Trouble section of this manual all of the mapping variables are returned to their default values and mapping may have to be reconfigured After completing the username and password assignment plus the network Test Page configuration parameters and optional I O mapping assignments you can use the Test Page to operate your module and read inputs turn outputs on and off set tag names configure the watchdog timer and set watchdog timeout states Sure Be R ee 983EN 4012 Test Page Pen Pett Pent TagNeweChoceds MesewrContrt Te ssechaeects MCT sehen t cn E Tag 1 or S Tag t on Geer 1 ov i Sn Gm Tag 9 on E 2 w E 9 6 cy E n oy e 3 om CH Tog 2 im E T n fon E Port Watchdog Timer Control Port Nember Tine Secssdi State Password Contowaton Pane Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 1 6 BusWorks 981 982 983EN Module User s Manual WEB BROWSER Test Page TIP Viewing a module s web page is treated similar to viewing a web page on the internet The first time you open a page its image is stored as a temporary internet file in PC memory However each subsequent attempt to view that page will need to automatically upda
47. ect this module to a PC Otherwise you may use an auto crossing Ethernet switch such as the Acromag 900EN S005 to make connections Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Signal MDI Description TX Transmit Positive Tx Transmit Negative Rx Receive Positive Not Used Connects to Pin 5 Not Used Connects to Pin 4 Rx Receive Negative Not Used Connects to Pin 8 Not Used Connects to Pin 7 Case Material Self extinguishing NYLON type 6 6 polyamide thermoplastic UL94 V 2 color beige general purpose NEMA Type 1 enclosure Printed Circuit Boards Military grade FR 4 epoxy glass Shipping Weight 1 pound 0 45 Kg packed Safety Approvals CE marked EMC Directive 89 336 EEC UL Listed UL3121 First Edition UL1604 cUL Listed Canada Standard C22 2 No 1010 1 92 Hazardous Locations Class 1 Division 2 Groups A B C D Operating Temperature 25 C to 70 C 13 F to 158 F Storage Temperature 40 C to 85 C 40 F to 185 F Relative Humidity 5 to 95 non condensing Power Requirements Non polarized 15 36V DC SELV Safety Extra Low Voltage Observe proper polarity See table for current Supply 981 982 983EN 4012 Current Draw 112mA Typical 123mA Maximum 96mA Typical 106mA Maximum 73mA Typical 80mA Maximum 54mA Typical 59mA Maximum CAUTION Risk of Electric S
48. ed to de energize the equipment before servicing External Fuse Select a high surge tolerant fuse rated for 1A or less to protect unit Note that I O channels are not isolated channel to channel These limits represent the minimum requirements of the standard but product has typically been tested to comply with higher standards in some cases Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 3 2 BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O Environmental Ethernet Interface Conducted RF Immunity CRF 10V rms 150KHz to 80MHz per EN61000 4 6 Surge Immunity 0 5KV per EN61000 4 5 Emissions Per European Norm EN50081 1 Radiated Frequency Emissions 30 to 1000MHz per EN55022 Class A WARNING This is a Class A product In a domestic environment this product may cause radio interference in which the user may be required to take adequate measures IMPORTANT Power input and output I O wiring must be in accordance with Class Division 2 wiring methods of Article 501 4 b of the National Electrical Code NFPA 70 for installations in the US or as specified in section 18 1J2 of the Canadian Electrical Code for installations within Canada and in accordance with the authority having jurisdiction This equipment is suitable for use in Class I Division 2 Groups A B C and D or non hazardous locations only WARNING EXPLOSION HAZARD Sub
49. eld while powering the unit Also make sure that you are pressing the DFT toggle in the DFT direction left rather than the RST direction right Note that if you perform the procedure for restoring a module to its original configuration as outlined above all of the I O mapping variables are returned to their default values and I O mapping may have to be reconfigured Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 1 Q TECHNICAL REFERENCE e Safety Agency Approvals CE UL amp cUL listed plus Class 1 KEY FEATURES Division 2 Groups A B C D approval e Fully Isolated I O channels network and power are all isolated from each other for safety and increased noise immunity e Modbus TCP IP Protocol Support Supports up to 10 sockets masters using port number 502 Modbus TCP IP Default e I O Mapping i20 Feature Allows the inputs of a 983EN device to control the outputs of an Acromag 982EN or 983EN output module e Flexible IP Addressing Supports static DHCP or BOOTP e Built In Web Pages Allow unit to optionally be configured controlled and monitored via access with a standard web browser over ethernet e Convenient Wink ID Mode Support Blinks green RUN LED in wink mode as a tool to help identify specific remote units e Fully Independent w Direct I O Connection Sel
50. endor These SIP resistors typically come rated for 0 2W 0 3W 0 4W or 0 5W per element For example refer to Bourns 4308R 102 4808M 102 or 4308H 102 parts You may also refer to Dale CSC08C03 MSP08C03 or MSMO8C 03 parts The 5 6KQ SIP provided is a high power type from Bourns part number 4308H 102 562 and is rated at 0 5W per resistor up to 70 C See I O Pullup Resistor Installation section for more information IMPORTANT When selecting a SIP resistor be sure to limit the individual resistor power dissipation to less than the rated power per element Further do not exceed 500mA of drain current per output or 2A total per RTN terminal Excitation External External voltage is applied between the port EXC and RTN terminals and must be limited to 35V or less The EXC terminal is tied to the even numbered pins of the resistor SIP socket provided for each port or group of 4 channels Dimensions 1 05 inches wide 4 68 inches tall 4 35 inches deep Refer to the dimensions drawing at the front of this manual DIN Rail Mount Type EN50022 T rail 85mm I O Connectors Removable plug in type terminal blocks rated for 15A 300V AWG 12 24 stranded or solid copper wire Network Connector 8 pin RJ 45 connector socket with metal shield shield is isolated and bypassed to earth ground at the GND terminal with an isolation TVS and capacitor Connections are wired MDI as opposed to MDI X You must use a CAT 5 crossover cable to conn
51. ers as required by your application You may also use a standard web browser to access the built in web pages of the module to perform basic operations Modbus TCP IP Digital I O 2 3 Dynamic Host Configuration Protocol DHCP Domain Name System DNS MODBUS REGISTERS The x following the leading character represents a four digit address location in user data memory The leading character is generally implied by the function code and omitted from the address specifier for a given function The leading character also identifies the IO data type Register Functions Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 2 4 BusWorks 981 982 983EN Module User s Manual Register Functions IMPORTANT When using your own software to manipulate the module please note that the maximum query through the Modbus TCP interface is only 50 registers due to the maximum buffer size limitations of the TCP IP stack As such you can only request data from 50 registers at one time for commands that access multiple registers For example the Read Holding Registers command may only retrieve the contents of registers 40001 to 40051 in one read Register Mirroring Modbus TCP IP Digital I O Below is a subset of standard Modbus functions that are supported by this module along with the reference register address group that the function operates on Use these functions
52. es or fiber optic transmission However the total round trip delay time must not exceed 512 bit times for collision detection to work properly Port Status Indicators Green LED indicates link status ON if auto negotiation has successfully established a connection yellow LED indicates activity ethernet connection is busy traffic is present Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 33 Address The module IP address can be preset by the user static and Refer to Acromag Application loaded from internal non volatile memory or it can be automatically Note 8500 734 for instructions acquired at startup via a network server using a BOOTP Bootstrap on how to change the IP Protocol or DHCP Dynamic Host Configuration Protocol The unit address of your PC network also includes a default mode toggle switch to cause the module to interface card in order to talk assume a known fixed static IP address of 128 1 1 100 for to an Acromag module troubleshooting purposes LED Indicators Controls amp Indicators RUN Green Constant ON if power is on and unit is OK Continuous flashing ON OFF indicates unit is in wink ID mode ST Yellow Slowly blinks ON OFF in default mode blinks rapidly if a watchdog timeout has occurred LINK Green Indicates Ethernet link status ON if auto negotiation has
53. f next page Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 1 8 BusWorks 981 982 983EN Module User s Manual TROUBLE SHOOTING Trouble Browsing Your Module Getting Out Of Trouble faH So your module s gone wild follow this procedure to restore it to its initial configuration and regain control Modbus TCP IP Digital I O Please refer Acromag Application Note 8500 734 for help in setting up network communication with your module located on the CDROM shipped with your module or via download from our web site at www acromag com This document gives details for changing your PC s TCP IP configuration in order to communicate with your module see TCP IP Properties of Network Configuration in Windows If you have carefully followed this procedure and you still cannot browse your module you may have the web browser of your laptop or PC setup to use a proxy server when browsing the web If you are using Internet Explorer Refer to the Tools pulldown menu select Internet options click the Connections tab then click the LAN Settings button Locate the Proxy server information and uncheck the box next to the statement Use a proxy server for your LAN Then click OK to return to the Connections screen and click OK again to save your settings You should now be able to use Internet Explorer to browse the module as require
54. f contained with no special bus couplers power supply or rack mount required to operate e Network Port is Transient Protected Shielded RJ45 port includes transient protection from ESD EFT and other transients e 10Base T and 100Base TX Support Auto negotiated 10 100Mbps Half or Full Duplex e Plug In Terminal Blocks amp DIN Rail Mount Make mounting removal and replacement easy e Flexible Discrete Inputs amp Outputs High voltage current open drain outputs provide direct low side control of external devices Buffered inputs allow outputs to be read back or input levels to be monitored e Tandem Input Output Circuitry 983EN Only Input buffers are connected in tandem with open drain outputs for convenient loop back monitoring of the output state e Convenient Pullup Resistors Mounted In Sockets SIP resistors are installed in sockets on the I O board and provide input and output pull ups to the excitation supply These SIP resistors can be removed or exchanged according to your application e Outputs Have Built in Protection Over temperature current shut down protection is built in and include active clamping circuitry for switching inductive loads e Failsafe Mode Support w Watchdog Time Control Outputs can be sent to a failsafe state if the host fails and a watchdog timeout occurs e Nonvolatile Reprogrammable Memory Allows the functionality of this device to be reliably reprogrammed thousands of
55. fa TURNED ON lorr e YQ o e RTN v ON 983EN KEEP OUTPUTS TURNED OFF TO MONITOR EXTERNAL LOGIC SIGNAL v Connect digital outputs to the output terminals Refer to figures below SIMPLIFIED 982EN CHANNEL Output Only S 5 6K SIP RESISTOR EXC INSTALLED IN SOCKET VO TO OTHER 3 S i CHAN OF PORT ON 1 La f L OFF 0 m OFF 0 TVS onm av R Active LOW q CH ALED Q 4 RTN v DIGITAL OUTPUT CONNECTIONS SIMPLIFIED 983EN CHANNEL Tandem Input Output S 5 6K SIP RESISTOR EXC INSTALLED 5V IN SOCKET ON 1 1 0 TO OTHER 3 M CHAN OF PORT S b gt OFF 0 100K OFF 0 ON 1 R TVS ON a x usv E L oF 0 cH Active LOW LED o RTN Vv POSSIBLE VARIATIONS CURRENT SINKING DC APPLICATIONS ONLY 983EN SIMPLIFIED INTERNAL I O CONNECTIONS ONE CHANNEL 5V INTERNAL OUTPUT L PULLUPS ARE OPEN Vig A 35V OUTPUTS RATED L TO 35V 500mA DC SHIELDED CABLE A TBT p N E exe S OUTO 8 cHo0 5V OUT a 5 os ane S cHo1 OUT2o S D cHo2 2 u OFF a OUT3e QI DIS enosi amp B ON o S D RTN A TBI WU oa OPEN DRAIN OUTPUTS FOR GREATER OUTPUT DRIVE SHARE RETURN Vv CONNECT AN INTERPOS
56. four twisted wire pairs Some variations will also include a drain wire that encircles the outer foil The double shielded version adds an outer wire screen that wraps around the foil shield and also functions as a drain wire The drain wire or wire screen typically makes contact at each end of the cable with the metal shield around special RJ45 plug connectors The metal shield of these connectors then makes contact with the metal shield of shielded RJ45 sockets The socket shield may make direct contact with earth ground or it may be capacitively coupled to earth ground In the Acromag 9xxEN modules this shield contacts earth ground via a high voltage capacitor and transient voltage suppressor In addition to minimizing radio frequency and electromagnetic interference this arrangement also has the added benefit of enhanced protection from ESD Electro Static Discharge Further Acromag recommends the use of enhanced Category 5 cable CAT 5e This cable has all the characteristics of Category 5 but includes enhancements that help to minimize crosstalk It is rated for frequencies up to 200MHz double the rate of Category 5 Category 5e cable also has a greater number of turns per inch in its twisted pairs making its performance more suitable for applications that make use of all four wire pairs for simultaneous bidirectional data transmission full duplex This cable is defined in TIA EIA 568A 5 Addendum 5 Acromag offers the following cabl
57. g Z 0123 CONDUCTING OR INPUTS R C000 ARE ASSERTED LOW DIGITAL IN or OUT PWR 6 54567 3 O 891011 g ETHERNET ACTIVITY J O O acth LED YELLOW AND Model 983EN 4012 Shown __ ag LINK LED GREEN 981EN 4012 amp 982EN 4012 Similar O lt p gt RESET DEF ADDRESS TOGGLE SWITCH TOGGLE RIGHT TO RESET TOGGLE LEFT TO SET DEFAULT ADDRESS DIGITAL IN or OUT DIGITAL IN or OUT S2rsge SzegerEe Set N R45 ETHERNET JESSE SESTEESE i CONNECTOR Blit 12 13 14 15 16 21 22 23 24 25 26 U D RAARAA ARARAA REMOVABLE PLUG IN TYPE TPVSS O CASCOS TERMINAL BLOCKS TB1 TB2 The toggle switch is used to toggle the module into or out of Default Mode toggle left or to reset the module toggle right In Default Communication Mode the yellow ST LED blinks slowly and the module assumes a fixed static IP address of 128 1 1 100 a default subnet mask of 255 255 255 0 a default username of User and a default password of password00 DC DIGITAL VO PWR TB4 TB3 BDDDDDD AIADADDS SF A UUUUUY UU 46 45 44 43 42 41 33 92 slg Eka Bir ale ESS 5 als DIGITAL IN or OUT PWR TRANSFORMER R 5V
58. hock More than one disconnect switch may be required to de energize equipment before servicing Isolation I O channel power and network circuits are isolated from each other for common mode voltages up to 250VAC or 354V DC off DC power ground on a continuous basis will withstand 1500VAC dielectric strength test for one minute without breakdown Complies with test requirements of ANSI ISA 82 01 1988 for voltage rating specified Installation Category Designed to operate in an installation in a Pollution Degree 2 environment with an installation category over voltage category Il rating Electromagnetic Interference Immunity EMI Inputs outputs have demonstrated resistance to inadvertent state changes with interference from switching solenoids commutator motors and drill motors Electromagnetic Compatibility EMC Minimum Immunity Per European Norm EN50082 1 Electrostatic Discharge ESD Immunity 4KV direct contact and 8KV air discharge to the enclosure port per EN61000 4 2 Radiated Field Immunity RFI 10V M 80 to 1000MHz AM and 900MHz keyed carrier per EN61000 4 3 and ENV50204 Electrical Fast Transient Immunity EFT 2KV to power and 1KV to signal I O per EN61000 4 4 Modbus TCP IP Digital I O 3 1 Enclosure amp Physical Agency Approvals Environmental CAUTION Do not exceed 36VDC peak to avoid damage to the module CAUTION Risk of Electric Shock More than one disconnect switch may be requir
59. imeout Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Upon power up the green Run LED should light This indicates the unit is operating normally A continuous blinking Run LED indicates wink ID mode If the Run LED remains OFF and correct power has been applied Modbus TCP IP Digital I O 1 F TROUBLE SHOOTING then either the internal power supply has failed or a fatal processor error firmware has occurred SYMPTOM Green RUN LED does not light Continuous flashing green RUN LED Cannot communicate Many Communication Errors Outputs Not Working Cannot Browse Module POSSIBLE CAUSE Internal 3 3V power has failed Module in wink mode Power ON at the module POSSIBLE FIX Return module for repair Diagnostics Table Read Module Status register to verify wink status Write 5555H to Wink Mode Toggle Register to toggle wink mode off on Check power Is green RUN LED ON Connecting cable is not a crossover cable TIP To check cable hold both ends in same position and read the wire colors through the clear portion of the plug from left to right If colors are arranged in the same order you have a straight cable This module s ethernet port is wired MDI You must use a crossover cable when connecting this module to your PC or another device also
60. n also find more information specific to Modbus TCP IP by down loading whitepaper 8500 765 Introduction To Modbus TCP IP For your convenience this module mirrors the contents operation of registers Oxxxx 1Xxxx amp 3xxxx as applicable into holding register space for systems and controllers that cannot directly access registers Oxxxx 1XXXX amp 3XXXX All Modbus registers of this model can now be written to or read from using either the standard methods described in the Modbus specification or through mapping mirroring to the Holding Registers The registers are mapped as follows and specifics follow the mapping Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual Modbus TCP IP Digital I O 2 5 Oxxxx Coil Registers are mapped to 42xxx Holding Registers Register Mirroring 1xxxx Input Status Registers are mapped to 41xxx Holding Registers 3xxxx Input Registers are mapped to 43xxx Holding Registers For 3xxxx Input Registers the format of the registers are identical and you only need to offset your address by 43000 For example if you want to read Input Register 1 through the Holding Registers you would use the Read Holding Registers function with an address of 43001 For the 1xxxx Input Status Registers the return data is reformatted to match the Holding Register format For example if you request the Input Status for 12
61. ndustrial environments and or in the presence of strong electrical fields You can use an Ethernet switch or switching hub to build a network of Ethernet modules similar to that shown below This drawing shows how to network connect these modules to a 5 port Ethernet switch Acromag Model 900EN S005 Note that the 900EN S005 switch includes automatic MDI MDI X crossover and straight through or crossover cable s may be used but it is generally not good practice to use crossover cables when connecting to an auto crossing switch USE OF AN ETHERNET SWITCH TO NETWORK J 2223 A HOST PC TO MORE THAN ONE MODULE The ethernet port of the PC is generally not automatic MDI MDI X crossover and is wired MDI CAT 5 UTP CABLE ETHERNET SWITCH Acromag 900EN S005 5 Port Ethernet Switch or equivalent The ethernet ports of this switch are automatic MDI MDI X crossing and do not require HOST PC l UP TO 100 METERS crossover cables 5 l 5S BIr e E UE Acromag 9xxEN 4012 a a m Because the Acromag ethernet switch E alel Pete Ethernet Modules ij 900EN S005
62. ont of the module to place the subnet mask of module in default mode then Default Communications Mode will be 255 255 255 0 a default indicated at the bottom of this screen username of User and a default password of Click the Submit button to complete any changes made on this page passwordood Click the Wink On Off button to toggle the module in out of wink ID mode In this mode the module s green RUN LED will blink to confirm identification Refer to the Technical Reference section of this manual to learn more about IP Addressing terms and concepts Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 1 4 BusWorks 981 982 983EN Module User s Manual WEB BROWSER I O Mapping Page Optional i20 Function 4 0 Note the i20 mapping feature may only be configured via the built in web browser page as there are no Modbus registers for specifying these parameters This messaging function works best if the target module s are already online and ready to receive messages It will still work if the target output modules come online after the input module but may take several minutes to discover all the network targets and begin transmitting to them If the input module or the target module s go offline remote messaging will resume on its own when the connection is re established but this healing function may take seve
63. ral minutes depending on which device s went offline why and for how long Modbus TCP IP Digital I O This module includes special remote messaging functionality i20 input to output communication that allows it to send its digital input information 983EN only to an output channel on another Acromag 982EN 4012 or 983EN 4012 digital output module The I O Mapping page shown below is used to specify the static IP address of the 982 983EN module to send an input channel s data to either upon change of state or cyclically at the update rate specified Optionally the data can be inverted on a port by port basis before being sent via i20 by selecting Yes for Invert Sent Data pine 983EN 4012 VO Mapping Page Port Namber Change of State Levert Seat Data Update Tame Sex Map To IP Address o 1 NOTE Sening Update Tise to tems off DO mapping for that port NOTE Taning on Change of State or LO mapping wil came aey arde to the aayat of that port to be ignewed IMPORTANT This module is designed to function as a Modbus TCP IP slave server Normally Modbus servers are not allowed to initiate messages on their own and may only respond to client master requests The i2o functionality of this module is a special application that may cause confusion for some master client devices linked to the same network Other master devices should be restricted from attempting to control i20 target devices These models have
64. romag 901 902 903MB ModBus modules except that registers for slave address baud rate parity turnaround delay and reset have been removed Unless otherwise noted Holding Register values are maintained in non volatile flash memory Description Data Type Format Coil Registers 0x References Read Write 00001 0 11 12 Discrete Thru 0000 Outputs 0 00012 OOOB 11 983EN amp 982EN Only Note This signal corresponds to the gate signal of the n channel output mosfet Thus a read of this register may not reflect the actual output level at the drain of the mosfet if the open drain is not pulled up or is left floating Excitation must be provided in order to operate the outputs On 983EN units you can read the Contact Registers to obtain the actual output state s via closed loop feedback Contact Registers Input Status Discrete Output Value Addresses a specific bit of a 16 bit word that controls monitors the ON OFF status for the output the gate signal of the n channel mosfet O OFF 1 ON The bit position also corresponds to the output channel number i e output 0 uses bit 0 of the 16 bit word at address 0 output 1 uses bit 1 of the 16 bit word at address 1 etc Unused bits are set to 0 A set bit 1 means the output is turned ON sinking current A clear bit 0 means output is turned OFF open Bits 15 12 Not Used Additionally unused bits in range 11 0 are set to 0
65. rt that are used for identifying the sub network By convention the bits of the mask that correspond to the sub network address are all set to 1 s it would also work if the bits were set exactly as in the network address It s called a mask because it can be used to identify the unique subnet to which an IP address belongs to by performing a bitwise AND operation between the mask itself and the IP address with the result being the subnetwork address and the remaining bits the host or node address For our Example if we wish to further divide this network into 14 subnets then the first 4 bits of the host address will be required to identify the subnetwork 0110 then we would use 11111111 11111111 11111111 11110000 as our subnet mask This would effectively subdivide our Class C network into 14 subnetworks of up to 14 possible nodes each With respect to the default settings of this module Subnet Mask 255 255 255 0 11111111 11111111 11111111 00000000 IP Address 128 1 1 100 10000000 00000001 00000001 01 100100 Subnet Address 128 1 1 0 1000000 00000001 00000001 00000000 The subnetwork address of 128 1 1 0 has 254 possible unique node addresses we are using node 100 of 254 possible Nodes 0 10 and 255 are typically reserved for servers and may yield poor results if used Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual
66. stitution of components may impair suitability for Class Division 2 WARNING EXPLOSION HAZARD Do not disconnect equipment unless power has been switched off or the area is known to be non hazardous Connector Shielded RJ 45 socket 8 pin 10BaseT 100BaseTX Wiring Wired MDI Unit does NOT support auto crossover Protocol Modbus TCP IP w Web Browser Configuration IP Address Default mode static IP address is 128 1 1 100 Port Up to 10 sockets supported uses port 502 reserved for Modbus Transient Protection Transient Voltage Suppressors are applied differentially at both the transmit and receive channels The metal shield is capacitively coupled to earth ground terminal via an isolation TVS and capacitor Data Rate Auto sensed 10Mbps or 100Mbps Duplex Auto negotiated Full or Half Duplex Compliance IEEE 802 3 802 3u 802 3x Modbus TCP IP Protocol Support Up to 10 sockets may be selected Web pages for configuration and control are built in and may be accessed over Ethernet via a standard web browser Most module functionality is configured via memory map registers or web pages but some functionality may only be configured via web pages Rx Tx Memory 8K bytes internal SRAM memory for receive and transmit buffers FIFO Communication Distance The distance between two devices on an Ethernet network is generally limited to 100 meters using recommended copper cable Distances may be extended using hubs switch
67. t the input buffer circuitry and output mosfet drain circuitry are connected in tandem to the same I O pin for the Model 983EN Output ON Current Range 0 to 500mA DC continuous up to 6A total for all 12 channels combined No deration required at elevated ambients Group one RTN per each group of 4 outputs Output Ras ON Resistance 0 130 typical 0 28Q Maximum Output Response Time 220us typical measured from output trigger at the controller to corresponding input transition at the controller Actual switch time will vary with output load and interrupts Note Per UL when the outputs are used to control interposing relays for switching AC and DC devices of higher voltage current the coil ratings for the interposing relay shall not exceed 24VDC 100mA 1 O Pullups amp Socket I O channels include sockets for installation of SIP resistor networks to act as pull ups for the channel see I O Pullup Resistor Installation drawing of page 4 These resistors are located on the plug in I O board cover removal required A SIP socket is included for each group of four channels port and a 5 6KQ resistor SIP is installed from the factory The even numbered pins of these sockets common leads connect to the port EXC terminal An external excitation supply is typically connected between the EXC and RTN terminals of the port The recommended SIP resistor is a four isolated resistor type 8 pins and may be obtained from Acromag or another v
68. te that image especially when making configuration changes With Internet Explorer click the Internet Options of the Tools menu select the General tab locate the Temporary Internet Files information and click on the Settings button Then select Automatically under Check for newer versions of stored pages Then click OK to return to the General screen and click OK again to save your settings Modbus TCP IP Digital I O Use the scroll bar on the right to scroll down the page as shown below eo j riers a 7 a Ta ae ied ar ca ee Ew g Ew g too E sin a ia E on G 6 n Bm oom g ia 7 im E u so g Port Watchdog Timer Control Port Nember Time Seeomty See Network Configuration Page Password Configuration Page VO Mapping Home Page Note that the 12 channels of this module are divided into 3 groups ports of 4 channels each Each port represents one pluggable I O terminal block 6 screws Port Number 0 refers to I O channels 0 3 port number 1 refers to channels 4 7 and port number 3 to channels 8 11 The state of a channel is indicated by the color of the simulated LED s and the text ON or OFF These states also reflect the actual yellow I O status LED s of the module Tag names can be up to 9 characters IMPORTANT The input state indication only reflects the state of the inputs at the moment this screen is invoked and this does not contin
69. three ports of 4 digital I O channels Port 0 refers to digital I O channels 0 1 2 and 3 Port 1 refers to digital I O channels 4 5 6 and 7 Port 2 refers to digital I O channels 8 9 10 and 11 Each input port of a 983EN may be mapped to the corresponding output port of another 982EN or 983EN Optionally you can invert the input state data sent to an output port The digital inputs may be written cyclically or upon change of state However if you select change of state you will still need to specify a cyclic update rate in order to keep the communication socket open and prevent a timeout if your change of state transitions happen to occur at intervals greater than 90 seconds apart If you select a time of 0 with change of state enabled a default value of 30 seconds will be used to ensure the connection remains open You may want to make the update time longer to conserve network bandwidth while still preventing a timeout If you disable change of state then your output control messages will occur at every interval of your update time a time of 0 disables cyclical messaging Note that the digital inputs only map externally and always control the exact same channels of target modules port to port but individual ports may map to output ports of different modules at different IP addresses Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com BusWorks 981 982 983EN Module User s Manual
70. times e Operation Diagnostic LED Indicators Aide Troubleshooting 12 yellow LED s indicate active low I O state Yellow ACT LED indicates port activity busy Green LNK LED indicates link auto negotiation complete and connection established Green RUN LED indicates power or blinks in wink ID mode Yellow ST LED indicates default communication mode slow flash and timeout status fast flash e Internal Watchdog A hardware watchdog timer is built into the microcontroller that causes it to initiate a self reset if the controller ever locks up or fails to return from an operation in a timely manner e Wide Range DC Power Wide range diode coupled for use with redundant supplies and or battery back up e Hardened For Harsh Environments For protection from RFI EMI ESD EFT amp surges Has low radiated emissions per CE requirements e Wide Ambient Operation Reliable over a wide temperature range Acromag Inc Tel 248 624 1541 Fax 248 624 9234 Email sales acromag com http www acromag com 20 BusWorks 981 982 983EN Module User s Manual HOW IT WORKS nvucrrcv 5 6K OHM SIP RESISTOR INSTALLED IN SOCKET 981EN 983EN INPUT BLOCK Modbus TCP IP Digital I O These digital I O modules will interface with any mix of up to twelve digital input and or output signals according to the model and provide an isolated 10 100Mbps Ethernet interface for configuration monitoring and control of
71. to access these registers as outlined in the Register Map for sending and retrieving data The following Modbus functions operate on register map registers to monitor configure and control module I O CODE FUNCTION REFERENCE 01 01H Read Coil Output Status OXxxx 17 14H If an unsupported function code is sent to a module exception code 01 Illegal Function will be returned in the response If a holding register is written with an invalid value exception code 03 Illegal Data Value will be returned in the response message You may refer to the Modbus specification for a complete list of possible error codes 983EN 4012 Report Slave ID Example Response Unit ID Echo Unit ID Sent In Query Function Code 11 Byte Count 30 Slave ID Model No OE 983EN 4012 12 DI O FFH ON 41 43 52 4F 4D 41 47 2C 39 33 30 30 2D 31 33 32 2C 39 38 33 45 4E 2D 34 30 31 32 2C 30 31 32 33 34 35 41 2C 30 31 32 33 34 35 ACROMAG 9300 132 983EN 401 2 serial number amp rev six byteMACID Note The 981EN slave ID is OC and the firmware number is 9300 130 The 982EN slave ID is OD and the firmware number is 9300 131 The 983EN slave ID is OE and firmware number is 9300 132 Run Indicator Status Firmware Number String Additional Data Field For detailed information on Modbus feel free to download our technical reference 8500 648 Introduction To Modbus at www acromag com You ca
72. uously update You can click your browser s refresh button to get a new input update The output states are updated each time you click the channel s On Off button You can use the On Off buttons adjacent to the channel number to turn the outputs of 982EN and 983EN modules ON or OFF The output state indication is updated each time you click On Off A watchdog timeout is triggered at the port if no channel read or write occurs for one or more channels of a port within the time period specified You can use the Port watchdog Timer Control to specify Time from 0001H to FFFEH seconds 1 to 65534s A Time value of OOOOH or FFFFH 0 or 65535 will disable the timer for the port I O You can also define the state the outputs are to assume following a timeout via the lower 4 bits of the 16 bit value entered into the State field for the port Enter FFFFH into the State field to leave the port outputs unchanged following a timeout Note that the lower order bit bit 0 corresponds to the lowest channel number for the port bit 1 to the next channel number and so on Except for FFFFH the first three hexadecimal digits of State are ignored each port has only 4 channels and the least significant nibble 4 bits of the State value are all that s required for control For example Enter a state value of 0000 to turn OFF open all port outputs failsafe state upon watchdog timeout You would enter OOOF to turn all port outputs ON upon watchdog t
73. you may have to consult with your network administrator and either temporarily change your TCP IP configuration see TCP IP Properties of Network Configuration in Windows or create a separate private network using a second network adapter installed in your PC recommended The necessary steps will vary with your operating system Refer to Acromag Application Note 8500 734 to help accomplish this located on the CDROM shipped with your module or via download from our web site at www acromag com The Number of Sockets refers to the number 1 10 of Modbus TCP IP access points to allow for this host The default allows up to 10 sockets but you can restrict access by reducing this number Internally the module uses port number 502 which is reserved for Modbus The DNS Server refers to the IP address of the Domain Name Server used on this network A DNS server relates symbolic names to actual numeric IP addresses while the DHCP server is responsible for dynamically passing out IP addresses A Subnet Mask is used to subdivide the host portion of the IP address into two or more subnets The subnet mask will flag the bits of the IP address that belong to the network address and the remaining bits correspond to the host portion of the address The unique subnet to which an IP address refers to is recovered by performing a bitwise AND operation between the IP address and the mask itself with the result being the sub network address Gateway refers

Modbus TCP/IP 10/100 Industrial Ethernet I/O Modules

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