Freelance Ac900F with Ref601
What Is the response time for modbus communication between AC900F controller and ABB Ref 601 protection relay
it took very long time to response even digital Actions.
Need more information.
is it on modbus tcp/ip or over modbus rtu ?
Incase of modbus rtu what baudrate you are communicating? if baudrate and other configuration matching both the side should not take long time. in your case it takes time in 1-2 seconds ? or even slower then that ?
I tried to establish AC900F and some third party device over modbus TCP communication was at reasonable speed, didn't observed any lag or slow response.
Is there any retires or error count while communicating? Check at hw tree select interface object and at lower pen one can observe if there any communication issues