S7-300 STL = Mnemonic

elons_nephew

Member
E
Join Date
Jan 2023
Location
Toronto
Posts
16
Another STL question. In the attached screen shot the line with = #sf.S01_Dryer_ON dose not have the RLO on. But if we look lower in the logic #sf.S01_Dryer_ON STA is a 1. How is this possible? And sorry if this is a dumb one, I am still trying to teach myself STL.

D1_Timer_Condition.JPG
 
The variable you mention is only being processed in one place in red, the code in green is not being processed and hence there is no RLO/STA status shown.

rlox.jpg
 
When the bit in RED becomes true, the line in ORANGE will turn this bit back to false, the RLO will be true causing the lines in GREEN to execute which will toggle the bit you are looking to go true.

rlox.jpg
 

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