Siemens SIMATIC Distributed I/O System DP/ASi Link, Руководство пользователя

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8-19
Distributed I/O System DP/ASi Link
EWA 4NEB 710 6055-02b
Table 8-15 Structure of diagnostic data, bytes 20 and 21, continued
Byte
1
Remedy Reason/Reaction Meaning
21.1 Configuration error:
configured ASi slaves not
present
”Actual is equal to setpoint config-
uration”:
data exchange cannot take place
on PROFIBUS-DP side.
Add the missing ASi slaves.
”Actual is less than setpoint con-
figuration” and operation:
data exchange is possible
21.2 ID code or I/O code of an
ASi slave erroneous
(occurs only during start-up)
The ID code or the I/O code of an
existing ASi slave does not corre-
spond to the data in the parameter-
ization message. Check whether a different slave
(different ID or I/O code) from that
specified in the parameterization
message is being used.
21.3 Internal DP/ASi error Parameterization data not present. Check whether the parameteriza-
tion and configuration messages
are present in your DP master.
21.4 ASi slave present with ad-
dress ”0” You have included an ASi slave
having an address of ”0” in the
ASi. Modify the ASi address on the ASi
slave.
If byte 20.4 is set simultaneously,
the correct ASi address is set auto-
matically.
21.5 EEPROM of DP/ASi link de-
fective An internal self-test has deter-
mined that the EEPROM is defec-
tive. Consult your point of contact at
Siemens.
1
Unnamed bits are without significance.
The failure of an ASi slave is indicated by diagnostic bytes 22 to 25.
Byte 22.0 is not assigned. In Table 8-16 you can see the assignment of the
different bits to the ASi address.
Defective ASi slaves are marked with a ”1”.
Table 8-16 Assignment of ASi address to bit positions, bytes 22 to 25
Byte
Bit (Corresponds to ASi Address)
7 6 5 4 3 2 1 0
22 7 6 5 4 3 2 1 –
1
23 15 14 13 12 11 10 9 8
24 23 22 21 20 19 18 17 16
25 31 30 29 28 27 26 25 24
1
This position is not assigned. An ASi slave with ASi address 0 is indicated by byte 21.4.
ASi slave diagno-
sis
Diagnostics and Error Handling