Hi All. I am trying to access an event log in a control panel. This panel keeps the log stored and I can access it via modbus. It requires me to write to a register to request the event number i want and the value is returned by another register. So say I want event 2 then i write a value 2 to register 1 and the value is returned in register 2. The problem is all values are returned in register 2 so to get more than one event i would need to constantly cycle the value of register 1 between 1 and 99 for all events. I have found that not writing to the panel returns me event 1 always, so I thought it may be best to avoid writing to the register 1 all together and using code "on data change" of a datasubscriber and then if the value of register 2 changes then a different event must be present. i just need to know how to keep shifting the events i already have read down a line on my event list. So event 1 is now event 2, replaced by new event read in register2. Any help is greatly appreciated, thanks.
