OTL and OTU (Output Latch & Output Unlatch) Ladder Logic Instructions


Ladder logic output instructions which write bit data referenced by an associated tag. The OTL instruction sets the referenced bit while the OTU instruction clears the bit. These instructions are used in pairs, meaning both instructions will reference the same tag.

List of arguments


Important Note: The data referenced by the tag is not cleared upon prescan or postscan.  In other words the data is retentive. Powering down the processor or putting it in program mode will not clear a bit that has been latched on.