Siemens CM 1542-5 Operating Instructions Manual page 38

Diagnostics and upkeep
5.3 Standard diagnostics
Bit no. Name
2 Slave_Config_Check_Fault
1 Station_Not_Ready
0 Station_Non_Existent
Byte 1: Station status 2
Table 5- 3 Structure of station status byte 2
Bit no. Name
7 Deactivated
6 Reserved
5 Sync_Mode
4 Freeze_Mode
3 Watchdog_On
2 Status_From_Slave
1 Static_Diag
0 Parameter_Request
Byte 2: Station status 3
Table 5- 4 Structure of station status byte 3
Bit no. Name
7 Ext_Data_Overflow
6...0 Reserved
38
Explanation
The configuration data sent by the DP master is rejected by the DP slave.
Cause: Configuration error. Solution: Change configuration.
The DP slave is not ready for productive data exchange.
This is a temporary status that cannot be influenced by the DP master.
The DP slave is not reacting on the bus.
This bit is set by the DP master 1 (the slave sets this bit permanently to 0). If the
bit is set, the diagnostic bits have the state of the last diagnostics alarm or the
initial value.
Explanation
The DP slave was identified as being not active in the local parameter record
and it is not polled cyclically.
- reserved -
The DP slave is in SYNC mode. The bit is set by the slave.
The DP slave is in FREEZE mode. The bit is set by the slave.
Watchdog monitoring is active on the DP slave. The bit is set by the slave.
Bit =1: The diagnostics information comes from the DP slave. The bit is set per-
manently to 1 by the slave.
Static diagnostics
If the DP slave sets this bit, the DP master must fetch diagnostics data from the
DP slave until the DP slave resets the bit.
The DP slave sets this bit, for example when it is not capable of data transfer.
The DP slave sets this bit when it needs to have new parameters assigned and
be reconfigured.
If bit 0 and bit 1 are both set, bit 0 has the higher priority.
Explanation
If this bit is set, there is more diagnostics information available than indicated in
the diagnostics data. This data cannot be displayed.
- reserved -
Operating Instructions, 11/2018, C79000-G8976-C290-04
CM 1542-5