Siemens simatic distributed i-o system dp-asi link ewa 4neb 710 6055-02b 사용자 설명서
7-5
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
EWA 4NEB 710 6055-02b
If the connection to an ASi slave or an ASi slave fails during routine opera-
tion, undefined states may occur at the outputs. Behavior depends on the
slaves concerned and the causes of failure. The input data are reset in the
DP/ASi link.
tion, undefined states may occur at the outputs. Behavior depends on the
slaves concerned and the causes of failure. The input data are reset in the
DP/ASi link.
The input data are not updated until a cause of failure has been remedied.
Note
If an ASi slave fails, the data sent by the DP/ASi link to the DP master are
no longer valid for to that ASi slave.
no longer valid for to that ASi slave.
Check, therefore, the validity of the data by evaluating the slave diagnosis
(bytes 22 to 25) and do not read the data into your PLC until you have
checked the data.
(bytes 22 to 25) and do not read the data into your PLC until you have
checked the data.
ASi slave failure
Operating Modes