Rung block Module 3,14,15 Block 926 logic invalid because S2 is an OR operation
A Rung Block stack was not initialized before the first OR operation
GMCL has determined that the execution of each Rung Block starts with a 1 on the stack. If the first operation is an OR, the result of the operation is always 1, regardless of the input to the OR operation. The first operation should never be OR. Use PUT (xx0) instead.
This message is likely to show an error in the system configuration. It should be reviewed. The issue raised may be in unused logic or graphics, or have other realities that make it a non-issue.
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