I created a new Modbus/TCP datasource with a 1-second update period, like many other Modbus datasources that are working fine. However, this new Modbus source reports "active source point has no value" for some datapoints, even though they worked when performing a "Point locator test" on the datasource page. On the graphical view, these points report "point value may not be reliable" and display "(n/a)" rather than a numerical value. The event page filled up with "Illegal data value" datasource alarms.
Why would the "Point locator test" work, but not the point it created?
Shouldn't the Modbus I/O log file report I/O originated from the Modbus read/write tools on the Datasource page?
The following is pasted from the Modules page:
core 2.8.8 build 635 - paid
modbus 1.8.0 - paid