uptown47
Lifetime Supporting Member
Hi all,
I recently was trying to find the addresses being used by a DP/DP Coupler in S7. The addressing was Input Word 20 and Output Word 20.
The Cross Reference data didn't show any bits being used at all as though these words weren't being addressed but then I found them (quite by chance) in the software addressed as peripheral words (i.e. PIW20 and PQW20).
The programmer was 'moving' them into Marker Words for manipulation in the software.
My question is, how do I check if an address is being used as a Peripheral Word ? Is it possible ? It doesn't show up on the normal reference data so is there another way to check apart from using 'Go To Location' for every address which you suspect is peripheral.
Many thanks
;-)
I recently was trying to find the addresses being used by a DP/DP Coupler in S7. The addressing was Input Word 20 and Output Word 20.
The Cross Reference data didn't show any bits being used at all as though these words weren't being addressed but then I found them (quite by chance) in the software addressed as peripheral words (i.e. PIW20 and PQW20).
The programmer was 'moving' them into Marker Words for manipulation in the software.
My question is, how do I check if an address is being used as a Peripheral Word ? Is it possible ? It doesn't show up on the normal reference data so is there another way to check apart from using 'Go To Location' for every address which you suspect is peripheral.
Many thanks
;-)