Siemens SIMATIC ET 200AL - Page 181

Interrupts, error messages, diagnostics and system alarms
5.3 Alarms
Interface module IM 157-1 DP (6ES7157-1AA00-0AB0)
38 Manual, 12/2016, A5E32100641-AD
Structure of station status 2 (byte 1)
Table 5- 6 Structure of station status 2 (byte 1)
Bit
Meaning
0
1:
The DP slave parameters need to be reassigned.
1 1: A diagnostics alarm is pending. The DP slave will not operate until the problem is
eliminated (static diagnostics alarm).
2
1:
The bit on the DP slave is always "1".
3 1: The watchdog is activated for this DP slave.
4
1:
The DP slave has received the control command "FREEZE".
1
5
1:
The DP slave has received the control command "SYNC".
1
6
0:
Bit is always "0".
7 1: The DP slave is disabled, that is, it has been removed from the processing in pro-
gress.
1
The bit is updated only if another diagnostics alarm also changes.
Structure of station status 3 (byte 2)
Table 5- 7 Structure of station status 3 (byte 2)
Bit
Meaning
0 to 6
0:
Bits are always set to "0".
7 1:
• There are more diagnostic alarms pending than the DP slave is able to store.
• The DP master cannot enter all the diagnostics alarms sent by the DP slave in its
(channel) diagnostics buffer.
5.3.4
Master PROFIBUS address
The following is stored in the diagnostic byte Master PROFIBUS address:
● The PROFIBUS address of the DP master that assigned the parameters to the DP slave.
● The PROFIBUS address of the DP master that has read and write access to the DP
slave.
The master PROFIBUS address is found in byte 3 of the slave diagnostics.