User manual

8-12
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
8.2.4 Contents of DP Standard Part
The first six bytes of the diagnostic message (byte 0 to byte 5) are termed the
DP standard part. They are independent of the DP slave used.
You will find a description of the structure of station status 1 in Table 8-8.
The default setting is 02
H
.
Table 8-8 Structure of station status 1
Bit Value Contents
0 1 DP/ASi link cannot be addressed.
1 1 DP/ASi link not yet ready for data exchange.
2 1 The configuration data sent by the DP master do not correspond to
the configuration of the ASi.
3 1 Slave diagnosis available.
4 1 Requested function not supported by DP/ASi link.
5 1 Implausible response received from DP/ASi link.
6 1 Erroneous parameterization message present.
7 1 DP/ASi link assigned parameters by a DP master other than the DP
master that is just attempting to access the DP/ASi link.
You will find a description of the structure of station status 2 in Table 8-9.
The default setting is 05
H
.
Table 8-9 Structure of station status 2
Bit Value Contents
0 1 New parameters have to be assigned to DP/ASi link.
1 1 Static diagnostics available.
2 1 Reserved
3 1 Response monitoring activated.
4 1 FREEZE mode enabled.
5 1 SYNC mode enabled.
6 0 Reserved
7 0 DP/ASi link de-activated.
DP standard part
Station status 1
Station status 2
Diagnostics and Error Handling