Somebody have experience with it on Codesys V3. It is possible to do it with software PLC programm? (just send all time with tcp/ip Master image to Slave) and when master going down start Slave program from same state as Master was (working with Ethercat IO or Modbus TCP IO for example)?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
I have tried doing this with Modbus TCP, but i didn't a get satisfactory result.
Modbus TCP communication is not the most reliable.
I usally solve this by hardwireing a digital output from the primary master to an input on the secondary master.
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hello,
Somebody have experience with it on Codesys V3. It is possible to do it with software PLC programm? (just send all time with tcp/ip Master image to Slave) and when master going down start Slave program from same state as Master was (working with Ethercat IO or Modbus TCP IO for example)?
I have tried doing this with Modbus TCP, but i didn't a get satisfactory result.
Modbus TCP communication is not the most reliable.
I usally solve this by hardwireing a digital output from the primary master to an input on the secondary master.