shaydzmi
Member
Hi,
I'm an absolute beginner in PLCs..
I have an Allen Bradley SLC5/03 PLC installed on a machine, the program is working well, I uploaded it to my PC, in order to learn how it works, but I came across a weird things, one of them:
There is an input (I:3/4) that doesn't appear in the ladder program, but still does its work, it counts a distance. how could this happen?
The program I got from the PLC (format: .RSS) is identical to the one I got from the machine manufacturer (in PDF format).
Is there any hidden instructions in other places?
The PLC is connected to an HMI, but the mentioned input counts even when I disconnect the HMI.
any ideas?
I can upload the program in RSS and PDF if it's necessary.
Update1:
The project files:
PDF
RSS
I/O Configuration:
The Input 3/4:
I'm an absolute beginner in PLCs..
I have an Allen Bradley SLC5/03 PLC installed on a machine, the program is working well, I uploaded it to my PC, in order to learn how it works, but I came across a weird things, one of them:
There is an input (I:3/4) that doesn't appear in the ladder program, but still does its work, it counts a distance. how could this happen?
The program I got from the PLC (format: .RSS) is identical to the one I got from the machine manufacturer (in PDF format).
Is there any hidden instructions in other places?
The PLC is connected to an HMI, but the mentioned input counts even when I disconnect the HMI.
any ideas?
I can upload the program in RSS and PDF if it's necessary.
Update1:
The project files:
RSS
I/O Configuration:
The Input 3/4:
Last edited: