Manual

103Publication LOGIX-UM001B-EN-P - April 2010 103
Appendix B
PHASE Data Type
Introduction
The PHASE data type gives you status information about an equipment phase.
Set and Clear Equipment
Phase Tag Values
For most of the members of the PHASE data type, you can only monitor its
value. You can control only the following members.
When you create an equipment phase,
RSLogix 5000 software creates a tag for the
status of the equipment phase.
controller scope
name = phase_name
PHASE data type
Member Control Method
StepIndex If you program an equipment phase as a sequence of steps in ladder diagram or structured
text, use the StepIndex value as the step number or bit value. (SFCs automatically
sequence through steps.)
• To initialize the StepIndex value, use the configuration properties for the equipment
phase.
• To advance to the next step, write logic to increment the StepIndex value (for example,
MOV, MUL, OTL, :=)
Failure To Use this instruction
set the Failure value Equipment Phase Failure (PFL)
clear the Failure value Equipment Phase Clear Failure (PCLF)
When the
equipment phase
goes from idle 
running, StepIndex
= Initial Step Index.