Rockwell Automation Publication 1756-RM006K-EN-P - November 2018 489
Under most circumstances, use the SCMD instruction to programmatically
command an Equipment Sequence. However, use the SOVR instruction to
command an Equipment Sequence under the following conditions:
• When you are giving the HOLD, STOP, or ABORT command, and the
command must always execute under all ownership circumstances.
• If the HOLD, STOP, or ABORT command must execute even when you
have manual control of the Equipment Sequence through the Logix
Designer application or when another program, such as the FactoryTalk
Batch software, owns the Equipment Sequence.
For example, suppose your equipment checks for jammed material. If there is a
jam, you always want the equipment to abort. In that case, use the SOVR
instruction. This way, the equipment aborts even if you have manual control
through the Logix Designer application.
See also
Equipment Sequence command on page 473
Equipment Sequence Override command on page 476
Guidelines for SCMD instructions on page 480
Equipment Sequence Instructions on page 465
When should I use an SOVR
instruction instead of an
SCMD instruction?
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