When should I use an SOVR instruction instead of an SCMD instruction?
- Under most circumstances, use the SCMD instruction to programmatically command anEquipment Sequence. However, use the SOVR instruction to command anEquipment Sequenceunder these 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 theEquipment Sequencethrough theLogix Designerapplication or when another program, such as theFactoryTalk Batchsoftware, owns theEquipment 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
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