MMSRead16BoolM block "Valid" bit is getting fluctuating
This valid bit is used for some logic and its getting disturbed because of the valid bit getting false for some time and returning normal.
As per the Help Manual Valid bit means: "OUT TRUE as long as communication is OK and the verification of the integrity of the received data-set do not fail.".
I have checked the controller load is 78 & 64 % .
I have attached the screenshots of the MMS Connections status from both the controller.
Please check and help me.
here you can see in detail access variables , global variables and MMS Read and MMS Connect configuration
it is not the same MMS Read configuration , but it could be used as guide to verify some points of configuration
I hope to be useful
At the time of Valid bit toggling, what is the Error bit value and Status value of MMS Read block and MMS Connect block?
As per control builder help, to supervise the remote system - use MMS Connect Block and it's Error bit value for your application logic.
The remote system is supervised using an MMSConnect function block:
A connection to a remote system is supervised using a MMSConnect function block. The En_C parameter of the MMSConnect function block is set to the value True. The function block has an internally built-in supervisory function which sets the Error parameter if an error occurs, that is, connection with the remote system will fail. With an AlarmCond function block, one can supervise the condition of the Error parameter of the MMSConnect function block. If any disturbance in the communication with the remote system is detected an alarm may be generated by using an AlarmCond function block.