Modbus Communication Modules Modbus Communication Modules for Displays Order no. 205546 Modbus and RS 485 Communication Module Manual EN 6.
Modbus Communication Modules Table of Contents 1. Introduction 3 2. Communication Modules 4 2.1 Modbus and RS 485 Communication Module . . . . . . . . . . . . . . . 4 2.1.1 Version Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1.2 Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1.3 Physical mounting of Modbus module . . . . . . . . . . . . . . . . . . . . . . . .
Modbus Communication Modules 1. Introduction Thank you for choosing MJK Modbus communication module. We have done our utmost to design and manufacture a high quality product that should satisfy your requirements. The MJK modem and communication modules is easy to install in MJK MagFlux©, SuSix© and Oxix© units and to put into service. However, read this manual first to learn more about the specifications, how to install and how to operate the equipment.
Modbus Communication Modules 2. Communication Modules 2.1 Modbus and RS 485 Communication Module PCB no.: 510327-xxx Communication RS485 Termination GND GNDB OFF ON GND RS485 5V RTS Rx Tx 3V3 B A GND GND 3V3 5V5 Figure 1. Modbus and RS 485 Communication Module 2.1.1 Version Requirements The following software, firmware and hardware versions (or higher) are required for displays without an installed communication module: • Converter HW ver.: 807000 • Converter FW ver.: 842009-001 • Display HW ver.
Modbus Communication Modules 2.1.2 Technical Specifications Specification Description Mounting With 4 screws on transmitter’s I/O board Protection IP 20 Dimensions 51 x 82 mm ( H x W) Connectors One 5-position plugable screw terminal and one 20-pin bus connector Temperature -20 to +60 °C Settings One “Termination” dip switch LEDs White LEDs for “5V”, “Rx”, “Tx” and “3V3” Power consump. Approx. 0.18 VA Com.
Modbus Communication Modules 2.1.3 Physical mounting of Modbus module 1. Dismount screws 2. Remove back plate 3. Remove lid using a screwdriver EN 6.
Modbus Communication Modules 4. Align pins with contacts 5. Check all pins is in place in the Modbus slot and check placing for screws 6. Secure module using 4 screws 2.
Modbus Communication Modules 7. Ensure all 4 screws are in place 8. Make sure the rubber protection for cable is in place 9. Remount the back using the 3 screws EN 6.
Modbus Communication Modules 10. Terminal should be “ON” if the display is last or only in chain 2.
Modbus Communication Modules 2.1.4 Configuration Remarks • The connected units on the Modbus have unique assigned IDs built as follows: SRO modbus ID = Instrument modbus ID + modbus ID offset • ID 0 (broadcast) cannot be used (a broadcast is used for synchronous transmission of messages to all connected units). • Available registers are limited to the measured value registers of the individual units. Configuration settings cannot be accessed.
Modbus Communication Modules 2.1.5 Connection Examples 2.1.5.1 One Connected Unit This example illustrates connection, termination and ID configuration of a single unit with a communication module and a PLC. Termination Unit #1 PCB no.: 510327-xxx Communication RS485 Termination GND GNDB OFF ON GND RTS Rx Tx 3V3 3V3 B A GND GND RS485 RS485 5V 5V5 OFF ON PLC GND B B A A GND GND GND PE Figure 3.
Modbus Communication Modules 2.1.5.2 Three Connected Units This example illustrates connection, termination and ID configuration of three units each with a communication module and a PLC. Termination Unit #1 PCB no.
Modbus Communication Modules Exampe ID settings Unit #1 ID=1 and COM module offset ID=1 -> SRO ID=2 (1 + 1) Unit #2 ID=1 and COM module offset ID=2 -> SRO ID=3 (1 + 2) Unit #3 ID=4 and COM module offset ID=3 -> SRO ID=7 (4 + 3) Termination Modbus RS 485 communication requires bus termination. If the PLC is terminated, unit #1 must be set in “OFF” position, unit #2 in “OFF” position and unit #3 in “ON” position. If, on the other hand, the PLC is NOT terminated, unit #1 must be set in “ON” position. 2.
Modbus Communication Modules 2.1.5.3 Three Connected Units and One Common Display This example illustrates connection and ID configuration of for example three MagFlux units without display, one common, remote display unit with a communication module and a PLC unit. Termination Display unit with COM module MagFlux #1 PCB no.
Modbus Communication Modules 3. Order Numbers Order number 205546 3.
Modbus Communication Modules 4. Register Lists 4.
Modbus Communication Modules Register address Register name Type Security Read/ Write Comments 612 Total reverse flow 1 - 3 U64{3} - Read-only Reverse total [mm3] 613 Total reverse flow1 MS word U64{4} - Read-only 614 Resetable total reverse flow 2 - value U32 {low} Password Read/ Reset Reverse total [liter] 615 Resetable total reverse flow 2 - value U32 {high} - Read/ Reset Reverse total [liter] Total sum flow 1 LS word S64{1} None Read-only Sum total [mm3] Sum total= (Forw
Modbus Communication Modules Register address Register name 637 638 Type Security Read/ Write Batch counter 2 - value batch missing F32 {low} None Read-only See above F32 {high} - - Comments Status I/O Bits Register address Register name Type Security Read/Write System error bit 1-16 B16 None Read-only Bits System error bit { on = 1 & off = 0 } (to force zero write 12(0x0C) in address 5120 ) 1001 Register address Bit 1 = Factory reset has occurred (some settings have changed) Bit
Modbus Communication Modules Register address 1004 Register name Type Security Read/Write Status bits (Part 2) B16 None Read-only Bits Bit 1 = flow direction bit - forward flow = 0 / reverse flow = 1 (see settings for possible delay) Bit 2 = flow direction bit - A = 0 / B = 1 (see settings for possible delay) Bits 3-16 = reserved and read-value is 0 (zero) Login Login - value U16 None Read/ Write Write = 0 or 65535 to logout Min. U16 None Readonly 0 Max. U16 None Readonly 65.
Modbus Communication Modules 6755 6756 6757 6758 6759 6760 6761 Max. U16 None Readonly 2 Batch stop volume - value F32 {low} Password* Read/ Write [m3] (* = password can be disabled for this setting ) See above F32 {high} - - Min. F32 {low} None Readonly See above F32 {high} - - Max. F32 {low} None Readonly See above F32 {high} - - Table 2. MagFlux Register List EN 6.
Modbus Communication Modules 4.2 Oxix / SuSix Register List • • • • • • • Date: 2009-03-10 Firmware: 846001 Protocol: Modbus RTU Transfer rate: 9600 baud Format for serial com: 1-Startbit, 8-Databits, 1-Parity (Even), 1-Stopbit Password: OFF (default) To set up the converter, use the SuSix/Oxix Display Unit When a SuSix/Oxix Converter is connected to an external master, for example a PLC or an HMI interface, the SuSix/Oxix Display Unit can not be used simultaneous on the RS 485 communication port.
Modbus Communication Modules Status I/O Bits Register address Register name Type Security Read/Write System error bit (alarm) B16 Password Read/Reset Bits Oxix System error bit { on = 1 & off = 0 } 1001 Bit 1 = Factory reset has occurred (some settings have changed - check all used settings) Bit 2 = Eeprom write error (see log for details) Bit 3 = Sensor setting error (some settings are invalid or changed) Bit 4 = System error in eventlog (log in eventlog for details) Bit 5 = Current out not conn
Modbus Communication Modules Status I/O Bits Register address Register name Type Security Read/Write Sensor error (Alarm) B16 None Read-only Bits Oxix Status bit { on = 1 & off = 0 } 1003 Bit 1 = sensor - replace sensor Bit 2 = sensor - fix error / redo calibration point or clear all points and redo calibration Bit 3 = sensor - temperature error (thermistor is damaged) Bit 4 = sensor - check sensor cable Bit 5 = sensor - check sensor wiper Bit 6 = sensor - probe polluted => clean - if message is
Modbus Communication Modules Status I/O Bits Register address Register name Type Security Read/Write Status no.
Modbus Communication Modules 4.3 mA-Bus Converter List • Date: 2008-06-11 • Firmware: 845001-003 • Protocol: Modbus RTU • Transfer rate: 9600 baud • Format for serial com: 1-Startbit, 8-Databits, 1-Parity (Even), 1-Stopbit • Password: OFF (default) • To set up the converter, use the Display Unit When a mA-Bus Converter is connected to an external master, for example a PLC or an HMI interface, the Display Unit can not be used simultaneous on the RS 485 communication port. Support only Read is ”func.
Modbus Communication Modules Liability MJK Automation A/S is liable to the common rules of Danish law on product liability. However, the liability is reduced to coverage of our public liability insurance of products. To the extent where nothing else follows in lines of invariable rules of law, we are not liable for loss of profits and working deficits or other indirect losses. Changes As our products are developed continuously, we reserve the right to make any alterations without prior notice.. EN 6.
