Technical data

Table Of Contents
System Status Lists (SSL)
System Software for S7-300/400 System and Standard Functions - Volume 2/2
33-36
A5E00739858-01
33.21 SSL-ID W#16#xy71 - H CPU Group Information
Purpose
The partial list extract with SSL-ID W#16#xy71 contains information about the
current status of the H system.
Header
The header of partial list SSL-ID W#16#xy71 is structured as follows:
Contents Meaning
SSL-ID The SSL-ID of the partial list extract:
W#16#0071: Information about the current status of the H system
W#16#0F71: Only SSL partial list header information
INDEX W#16#0000
LENTHDR W#16#0010: One data record is 8 words long (16 bytes)
N_DR W#16#0001: Number of data records
Data Record
A data record of partial list extract ID W#16#xy71 has the following structure:
Contents Length Meaning
Redinf 2 bytes Information about redundancy
W#16#0011: Single H CPU
W#16#0012: 1 of 2 H system
Mwstat1 1 byte Status byte 1
Bit 0: reserved
Bit 1: reserved
Bit 2: reserved
Bit 3: reserved
Bit 4: H status of CPU in rack 0
=0: standby CPU
=1: master CPU
Bit 5: H status of CPU in rack 1
=0: standby CPU
=1: master CPU
Bit 6: reserved
Bit 7: reserved