andre.umbul

I have two redundant OPC servers that will need to access my V130 PLC simultaneously. I have setup two Modbus IP config and two Modbus IP SCAN_EX block with different Network ID and different ports (502 on socket 2 to Network ID 255 and 503 on socket 3 to Network ID 254). Looks like it will only work when only one of the master is active. When both of the masters are active the last one to connect will not be able to connect. Does anyone have a work around this? Do I need to only activate one SCAN_EX per scan cycle? Thanks in advance Andre

Thanks for your help. It looks like my Kepware OPC server does not support 32 bit registers. Are there easy way to split an mf into two separate 16 bit registers? Andre

I have a v130-330R34 (A). I've been trying to setup the Modbus TCP slave function of it using a Kepware OPC server as the master. For most part it works (MB, MI and ML). However I've been having issues retrieving the MF data. The two registers I need to grab are MF12 and MF13. I've following the manual by using the following calculation to get my modbus addresses (16384 + 400001 + 12*2 = 416409 and 16384 + 400001 + 13*2 = 416411). 16384 being a decimal representation of 4000h . I think i've pretty much tried every single permutation and still can't get it working (offset of 1 per index instead of 2). I've also tried swapping the high and low bytes in the PLC using the struct and swapbytes function and I still don't have any luck. Any one can provide any assistance? Andre