MD‑SI‑DP1 Communication
‑219‑
● RET_VAL: Error code (negative) when an invocation error occurs or actual length
of transmitted data (positive) when no error occurs.
● RECORD: Target area of the read diagnosis data. The value must be 9 bytes.
Otherwise, an error is reported during invocation. The 9 bytes are defined as
follows:
Bytes 0–2: Station status
Byte 3: Master number
Byte 4: Supplier ID (high‑order byte)
Byte 5: Supplier ID (low‑order byte)
Byte 6: Dedicated device diagnosis length (fixed to 3)
Byte 7: Dedicated device diagnosis (high‑order byte)
Byte 8: Dedicated device diagnosis (low‑order byte)
● BUSY: When this field is 1, reading is not complete.
Device‑specific diagnosis provides relevant AC drive fault information, which is
consistent with the value of U0‑62. When the communication between the MD‑SI‑
DP1 expansion card and AC drive is interrupted, 0x34 is returned.
To Next Page
Loading...
