Technical data

Structure of the station status bytes
Station status byte 1
Bit no.
Meaning
Explanation
7
Master_Lock The DP slave was assigned parameters
by a different DP master.
This bit is set by the CP (DP master)
when the master address in the byte
is not FFH and not the CP bus
address.
6 Parameter_Fault
The last parameter frame received
contained an error.
5 Invalid_Slave_
This bit is set by the CP (DP master)
when no plausible response was
received from the slave.
4 Not_Supported
The requested functions are not
supported by the DP slave
3 Ext_Diag Bit = 1 means: slave-specific diagn.
2
Slv_Cfg_Chk_Fault
Configuration data received from
master do not match the configuration
expected in the DP slave.
1 Station_Not_Ready The DP slave is not ready for the
data exchange.
0 Station_Non_Existent
This bit is set by the CP (DP master).
Response
Ext_Status-Message
data exist.
Bit = 0 means: slave signals own
status, with or without extended
diagnostic information.
The DP slave does not reply on the bus.
Table 11.4 Station Status Byte 1
B8976060/02 Distributed I/Os (DP)
11 - 55 Volume 1