SNK
Member
I am an Allen Bradley programmer, and have recently been asked to work with some of the Siemens S7 stuff for work.
My question is simple. Is the addressing for PI devices the same as I would expect on a S7-300 rack as an allen bradley SLC or Contrologix system? Maybe this will make my question easier to understand.
Slot 0 Power Supply
Slot 1 CPU S7-300
Slot 2 Profibus/MPI
Slot 3 MI module
Slot 4 Digital Input module
Slot 5 Digital Output Module
Basically, how do I address the first digital INPUT module in the program? Is the first byte of I0.0 and the second I1.0?
And the Output in card slot 5 Q0.0 and Q1.0?
In AB world, we reference with the card slot... eg I:4.0/0 and O:5.0/0
Furthermore, is there any set pattern that the I/O cards have to be set up on the local rack???
In my first attempt today to program, I cannot get the I/O cards to work properly online.
I have downloaded the S7-300 manual, but it does not go into detail about the specifics of rack location and addressing.
Thanks for any insight people.
My question is simple. Is the addressing for PI devices the same as I would expect on a S7-300 rack as an allen bradley SLC or Contrologix system? Maybe this will make my question easier to understand.
Slot 0 Power Supply
Slot 1 CPU S7-300
Slot 2 Profibus/MPI
Slot 3 MI module
Slot 4 Digital Input module
Slot 5 Digital Output Module
Basically, how do I address the first digital INPUT module in the program? Is the first byte of I0.0 and the second I1.0?
And the Output in card slot 5 Q0.0 and Q1.0?
In AB world, we reference with the card slot... eg I:4.0/0 and O:5.0/0
Furthermore, is there any set pattern that the I/O cards have to be set up on the local rack???
In my first attempt today to program, I cannot get the I/O cards to work properly online.
I have downloaded the S7-300 manual, but it does not go into detail about the specifics of rack location and addressing.
Thanks for any insight people.