Error Codes; Checksum - Mitsubishi Electric MELSERVO-J2 Series Instruction Manual

8. COMMUNICATION FUNCTIONS

8.5 Error codes

Error codes are used in the following cases and an error code of single-code length is transmitted.
On receipt of data from the master station, the slave station sends the error code corresponding to that
data to the master station. The code transmitted in uppercase indicates that the servo is normal and the
one in lowercase indicates that an alarm has occurred.
Error Code
Servo normal
[A]
[B]
[C]
[D]
[E]
[F]

8.6 Checksum

The checksum is sent as a ASCII coded hexadecimal code representing the lower two digits of the sum
of ASCII coded hexadecimal values up to ETX, with the exception of the first control code (STX or
SOH).
Station number
group
STX or
SOH
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Error Name
Servo alarm
[a] Normal operation
[b] Parity error
[c] Checksum error
[d] Character error
[e] Command error
[f] Data No. error
or
ETX Check
Checksum range
search engine
Description
Data transmitted was processed properly.
Parity error occurred in the transmitted data.
Checksum error occurred in the transmitted data.
Character not existing in the specifications was
transmitted.
Command not existing in the specifications was
transmitted.
Data No. not existing in the specifications was
transmitted.
S
[0] [A] [1] [2]
T
X
02H 30H 41H 31H 32H
30H 41H 31H 32H 35H 46H 03H
152H
Lower 2 digits 52 is sent after conversion into ASCII code [5][2].
8 - 7
Remarks
Positive response
Negative response
E
[5] [F] [5] [2]
T
X
35H 46H 03H