Autosol has taken their standard Modbus driver and created a version specific to the ALiEn2 that helps to retrieve both the Daily Production Log and Cycle Logs. You can see their help below for setup instructions. The sections below give more detail on how the driver works with the ALiEn2.
Log Data Types
The key thing that the ALiEn2 Modbus driver does is convert the date/time and elapsed time formats into more standard formats for OPC.
Autosol is expecting the Time Format of the controller to be set to seconds.
Date/Time Registers
These are used to capture and report the time that the log entry was saved. The data will be available as:
- Seconds since Jan 1, 2000 spanning 2 registers
- Year, Month, Day, Hours, Minutes, Seconds spanning 6 registers
Autosol is expecting to read seconds and will convert to Julian Time and store it as a standard OPC Date and Time.
Elapsed Time Registers
These are used to capture and report times such as Rise Time or Close Time that occurred for a particular log entry. The data will be available as:
- Seconds spanning 2 registers
- Hours:Minutes:Seconds spanning 3 registers
Autosol is expecting to read seconds and will convert to a double word.
Daily Production Log
There are two copies of the Daily Production Log. Autosol works with the earlier version that is backward compatible with older controllers. This is found at 3:0101.
Cycle Log
There are two copies of the Cycle Log. Autosol works with the earlier version that is backward compatible with older controllers. This is found at 3:1122.
Modbus Communication User’s Guide
More information on the available Modbus registers and their formats is available in the Modbus Communications User’s Guide.