System Integers are the Operating System interface to the user writing the application. System Integers are reserved by the Operating System for particular functions. Specific System Integers, for example, are connected to the M90's high speed counter/shaft-encoder.
There are 256 SIs (Address SI 0 - SI 255).
Only certain SIs may be written into by the programmer:
SI 2: Current HMI Display
SI 80 - SI 84: Linearization Parameters
SI 200 , SI 201: M90 Network Operand
Click on the System Integers folder in the Program Navigation pane to display the complete list of System Integers. Scroll down to view the complete list