Module algorithm types > Command-driven algorithms

COMMAND block parameters

Each COMMAND composite block includes an SFC algorithm with standard SFC parameters. In addition, SFC logic for command-driven algorithms includes the following additional parameters:

  • ENABLED — determines whether or not the COMMAND block SFC algorithm is currently enabled. If the command is not enabled, then the SFC algorithm in that COMMAND block is not run even if the A_COMMAND requests that block to run. The parameter is True by default.

  • CFM_MAX_TIME — determines the maximum time that the COMMAND block SFC algorithm can take to complete. If CFM_MAX_TIME is zero, then the time to complete is not limited. If CFM_MAX_TIME is less than zero, a timeout occurs immediately when a state change is attempted.

For algorithm and composite block parameters that accept time values, a negative value has the effect of a zero value.