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Remove the Protocol TCP/IP Configuration block if you're using MODBUS TCP. -
Plese read this topic And find in Help file "Vision700 - Using Ethernet" -
Since you replaced the EX-RC1 module, checked the conductors (by replacing), the power supply of the CAN modules, remains the only culprit - the PLC itself. I do not recommend anyone to repair the PLC - but you are probably convinced that the CAN transmitter in PLC is probably faulty. You can hire an electronics specialist to test the internal CAN module on the PLC's internal board. There is a well-known chip 78M05 - linear power converter + 5V and CAN driver 82c250 on the PLC motherboard reverse side. Due to the fact that the system worked for a long time without any problems, I think that the 78M05 chip failed. P.S. However, I recommend - once again check the correctness of the power connection (not reverse polarity) and the correct connection of the СAN bus wires. Sometimes the system stops working after someone else's intervention, which is unknown. And we have to look for a problem in places where there are no mistakes.
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By Javier Galaz · Posted
Hi, I've just joined this forum because I have a problem and I can't find the solution. I've a V700 HMI with a V200-18-E2B Snap-in I/O module. I need to use this HMI as a TCP/IP slave using port 502. I have a ladder that works on V130, but it doesn't work on this V700. could you please help me? ENAMI HMI 2 Solo Modbus.vlp is the trimmed down version of the program, because I wanted to remove every other variable in order to try to debug my program, I believe this should let me read and write every available modbus address (coils, input registers, etc), but when I try to read coils I get 0 bytes read. -
By Nikola Gramatikov · Posted
Yes everything is connected, bus power on terminal 1 and 5, canbus on 2 and 4 and termination resistor on 2 and 4, PE on pin 3
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