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Suppose I have rung with two inputs and an output. The first input is a normally open contact and the second intput is an IF instruction.
For my IF statement I have: IF F0829 > 0
My LET statement is: LET F0829 = F0939
Preceding both of these statements is a normally open contact.
The question I have is will F0939 be zero whenever the contact is open? Register F0939 is mentioned no where else in the logic program I am using. It's only occurence is in the aformentioned rung. The rung will be used to control the visibility of templates on an HMI.
The last question I have is, for the instruction,
LET F0829 = F0939, does this mean that the contents of F0829 are moved into F0939 so as to empty and zero out F0829, or, are the contents simply copied from F0829 into F0939?
Thank you very much for your help.
For my IF statement I have: IF F0829 > 0
My LET statement is: LET F0829 = F0939
Preceding both of these statements is a normally open contact.
The question I have is will F0939 be zero whenever the contact is open? Register F0939 is mentioned no where else in the logic program I am using. It's only occurence is in the aformentioned rung. The rung will be used to control the visibility of templates on an HMI.
The last question I have is, for the instruction,
LET F0829 = F0939, does this mean that the contents of F0829 are moved into F0939 so as to empty and zero out F0829, or, are the contents simply copied from F0829 into F0939?
Thank you very much for your help.