CANopen & CANlink Communication
‑71‑
Problem Solution
Unstable connection
1. Check that wiring on the PLC end is reliable. (Touch the
connection cables on the PLC end to check for poor contact.)
2. Check that wiring on the AC drive end is reliable, and make
sure that network cables are inserted tightly.
3. Check that the signal cables are far away from the power
cable.
Incorrect read value
1. Check that the configuration address is correct.
2. Check whether the program performs data conversion.
3. Make sure that the D component is not occupied.
4. Check the D component of I/O mapping.
4.6 Communication Faults
4.6.1 Emergency Message and AC Drive Faults
Emergency Message Data
The following table describes the 7‑byte data of the emergency message.
Table 4–25 Emergency message data
Emergency Error Code Error Register
Predefined Error Code
0 to 1 2 3 to 7
Note
● Emergency error code: For details, see relevant chapters of the DS301
documentation. 0x8100 indicates the communication error, and 0xFF00 indicates
predefined errors.
● Error register: For details, see the data value in 1001H of the object dictionary in
relevant chapters of the DS301 documentation. Bit0 is the error flag, bit4 is the
communication error flag, and bit7 is the predefined error.
● Predefined error code: See fault codes of the AC drive.
Fault Codes
The following table lists the standard fault codes of the MD520 series AC drive. For
details, see the MD520 user guide.
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