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Old October 10th, 2017, 06:51 PM   #2
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Originally Posted by cefisher15 View Post
I've got a print-out of old code (PLC-5/250) that I am trying to decipher. I am hung up on an expression in one of the compute blocks. The block parameters are as follows:

Expression: I:013{07..00}+(I:013/16<<8)

Can anyone please help me understand what this expression is saying? I can take a picture of the rung if it will help, but that is all of the info from the block.
I think I have deciphered it, and to be fair it looks a strange one, but to be absolutely sure can you show the bit patterns of I:013 and NUMST after the compute has been executed.
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Last edited by daba; October 10th, 2017 at 06:53 PM.
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