Technical data

Table Of Contents
System Status Lists (SSL)
System Software for S7-300/400 System and Standard Functions - Volume 2/2
A5E00739858-01
33-23
33.13 SSL ID W#16#xy25 - Assignment of Process Image
Partitions to OBs
Purpose
The partial list with SSL ID W#16#xy25 shows you how process image partitions
are assigned to the OBs.
This list provides information about
Process image partitions you have assigned to specific OBs for update by the
system
Process image partitions you have assigned to specific clock synchronization
interrupt OBs (OBs 61 to 64). The process image partition is updated here by
calling SFCs 126 "SYNC_PI" and 127 "SYNC_PO".
The assignment between the DP master systems and clock synchronization
interrupt OBs is found in SSL W#16#xy95.
Header
The header of the partial list with the SSL ID W#16#xy25 has the following
structure:
Contents Meaning
SSL ID The SSL ID of the partial list extract
W#16#0025: Assignment of the process image partition to the OBs in the CPU
W#16#0125: Assignment of a process image partition to the corresponding OB
Specify the process image partition ID in the parameter INDEX.
W#16#0225: Assignment of the OB to the process image partition
Specify the OB number in parameter INDEX.
Note: The clock synchronization interrupt OB (OBs 61 to 64) are the only ones you
can assign to multiple process image partitions.
W#16#0F25: Only info on the header SSL partial list
INDEX For SSL ID W#16#0025: irrelevant
For SSL ID W#16#0125: process image partition ID
For SSL ID W#16#0225: OB number.
For SSL ID W#16#0F25: irrelevant
LENTHDR W#16#0004: One data record has a length of 2 words (4 bytes)
N_DR Number of data records