Function Blocks - General Rules

The general rules for PLCopen are:

• Active Output
• Behavior of Busy Output
• Behavior of CommandAborted Output
• Behavior of Done Output
• Error Handling Behavior
• Input Parameters
• Inputs Exceed Application Limits
• Missing Input Parameters
• Output Exclusivity
• Output Status
• Sign Rules

See the Input Parameters or Read the Output of an MC Function Block in ST for more information.