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Okay, I have a Distributed Control System (DCS) and I want to communicate with a new piece of equipment via Modbus. There is no other equipment between these two pieces of equipment i.e. PLC. DSC is currently setup as open Modbus, but I have other options.
I'm using Cat6 cable to communicate with. I can ping the new device from DCS so I feel the Modbus setup is my problem.
Q1. How do I know who is the master and which is the slave? Do I decide? Would DCS be the master or it does not matter?
Q2. RTU or TCP? Currently TCP.
Q3. I'm asked data type and I have several options i.e. byte, Lword, short something and I tried several but no data transfer.
Q4. Do you feel Free downloadable Modbus software would be helpful? Recommendations?
This is a new install so I don't have another to refer to.
I feel like I'm throwing darts in the dark and the correct combination of settings will hit the jack pot.
Thanks in advance for any suggestions.
I'm using Cat6 cable to communicate with. I can ping the new device from DCS so I feel the Modbus setup is my problem.
Q1. How do I know who is the master and which is the slave? Do I decide? Would DCS be the master or it does not matter?
Q2. RTU or TCP? Currently TCP.
Q3. I'm asked data type and I have several options i.e. byte, Lword, short something and I tried several but no data transfer.
Q4. Do you feel Free downloadable Modbus software would be helpful? Recommendations?
This is a new install so I don't have another to refer to.
I feel like I'm throwing darts in the dark and the correct combination of settings will hit the jack pot.
Thanks in advance for any suggestions.