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Author Topic: reading a v-mem address from a H2-DM1E into a P3k.  (Read 6077 times)

plcprog1

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reading a v-mem address from a H2-DM1E into a P3k.
« on: April 28, 2017, 09:38:58 AM »
Trying to read a v-memory address ( V2) thru the domore on board Ethernet port with a P3K Modbus read instruction.
The P3K MRX seems to be working ok but not seeing the holding register. I think. With the domore I have a move instruction moving a CT0.Acc value into v2. The on the P3k side reading a holding reg. 40003. I thought possible it should be 40002 but also did not work. Do I need to setup some type of Modbus instruction in domore ( MH0 or MHR0) to make this work. Just trying to read a counter value from domore to P3K. Any suggestions would be helpful. Thanks

BobO

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Re: reading a v-mem address from a H2-DM1E into a P3k.
« Reply #1 on: April 28, 2017, 10:24:17 AM »
All Do-more Modbus servers target the Modbus guest memories MI, MC, MHR, MIR. If you are reading Modbus Holding Register 3, it will be MHR3 in Do-more.
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