Technical data

Table Of Contents
System Status Lists (SSL)
System Software for S7-300/400 System and Standard Functions - Volume 2/2
33-24
A5E00739858-01
Data Record
A data record of partial list extract SSL-ID W#16#xy25 has the following structure:
Name Length Meaning
tpa_nr 1 byte Partial process image ID
tpa_use 1 byte Type of assignment between process image partitions and the OB:
Bit 0 = 1: The process image partition of the inputs is assigned to the
specified OB for update by the system.
Bit 1 = 1: The process image partition of the outputs is assigned to
the specified OB for update by the system.
Bit 2 = 1: The process image partition of the inputs is assigned to the
specified clock synchronization interrupt OB. It can be updated in this
OB by calling SFC 126 "SYNC_PI".
Bit 3 = 1: The process image partition of the outputs is assigned to
the specified clock synchronization interrupt OB. It can be updated in
this OB by calling SFC 126 "SYNC_PO".
Bits 4 to 7: 0
ob_nr 1 byte OB number
res 1 byte Reserved
Partial list extracts
Partial list extract with SSL ID = W#16#0025:
The data records of all process image partitions you have assigned to an OB in
your configuration are returned in ascending order. The value of this ob_nr
parameter is zero for process image partitions not assigned to any OB. In this
case a data record is not returned for process image partitions.
Partial list extract with SSL ID = W#16#0125:
A data record is returned if you have assigned the addressed process image
partition to an OB in your configuration. No data record is returned if you have
not assigned an OB.
Note
OB 1 is permanently assigned to process image partition 0. Thus, you will always
receive a data record when you request information on process image partition 0.
Partial list extract with SSL ID = W#16#0225:
A data record is returned for all process image partitions you have assigned to
the called OB. No data record is returned if you have not assigned a process
image partition to the called OB.
Note
Clock synchronization interrupt OBs can be assigned multiple process image
partitions. If this is the case, several data records will be returned.
Partial list extract with SSL ID = W#16#0F25:
The maximum number of data records is returned.