Allen-Bradley LOGIX 5000 User Manual

Chapter 7
Equipment Phase Instructions
452 Rockwell Automation Publication 1756-RM006K-EN-P - November 2018
Structured Text
POVR (PhaseName, Command, Result);
Operands
Ladder Diagram
Operand Type Format Description
Phase Name phase Name of the
equipment phase
Equipment phase to change to a
different state
Command command Name of the
command
One of these commands for the
equipment phase:
• Hold
• Stop
• Abort
Result DINT immediate
tag
To let the instruction return a code
for its success or failure, enter a DINT
tag in which to store the result code.
Otherwise, enter 0.
Structured Text
The operands are the same as those for the Ladder Diagram POVR instruction.
Guidelines for using the POVR Instruction
Guideline Details
If want to override other owners. Want the equipment to hold, stop, or abort even if have manual
control of the equipment phase via Logix Designer software?
• Yes - Use the POVR instruction
• No - Use the PCMD instruction
This also applies to HMI, FactoryTalk Batch software or other
programs. Use the POVR only to hold, stop, or abort, regardless of
ownership.
For example, suppose the equipment checks for jammed
material. If there is a jam, always abort the equipment. In that
case, use the POVR instruction. This way, the equipment aborts
even under manual control via Logix Designer software.
Limit execution of a POVR instruction to
a single scan.
Limit the execution of the POVR instruction to a single scan. Each
command applies to only a specific state or states. Once the
equipment phase changes state, the command is no longer valid.
To limit execution, use methods such as:
• Execute the POVR instruction within a P1 Pulse (Rising Edge)
or P0 Pulse (Falling Edge) action.
• Place a one shot instruction before the POVR instruction.
• Execute the POVR instruction and then advance to the next
step.

Allen-Bradley LOGIX 5000 Specifications

General

Brand	Allen-Bradley
Model	LOGIX 5000
Category	Controller
Language	English