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I inherited a project from 2007 that is now in the startup phase. The field engineer apparently did not receive any interconnection information regarding two subsystems to the main control system. The Local Process Control system is a Quantum PLC (Schneider), the BMS portion is a HIMA, the two sub-systems are both Rockwell, one a MicroLogix 1100 and the second a MicroLogix 1500. We are using Schneider Serial to Ethernet converters (174-CEV by Schneider I think).
When a MicroLogix (either one) is configured as a Modbus Slave does that setup automatically convert the output to the Modbus RTU communications format? Can I connect directly from the Processor Channel to the RS-485 terminals of the converters?
When a MicroLogix (either one) is configured as a Modbus Slave does that setup automatically convert the output to the Modbus RTU communications format? Can I connect directly from the Processor Channel to the RS-485 terminals of the converters?