Error Codes; Checksum - Mitsubishi 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 Servo alarm
[A] [a]
[B] [b]
[C] [c]
[D] [d]
[E] [e]
[F] [f]

8.6 Checksum

Checksum range
The checksum is sent as a JIS8-coded hexadecimal code representing the lower two digits of the sum of
JIS8-coded hexadecimal values up to ETX, with the exception of the first control code (STX or SOH).
Error Name
Normal operation Data transmitted was processed properly.
Parity error Parity error occurred in the transmitted data.
Checksum error Checksum error occurred in the transmitted data.
Character not existing in the specifications was
Character error
transmitted.
Command not existing in the specifications was
Command error
transmitted.
Data No. not existing in the specifications was
Data No. error
transmitted.
Station number
or
group
STX or
SOH
Checksum range
S
[0] [A] [1] [2] [5]
T
X
02H 30H 41H 31H 32H 35H
30H 41H 31H 32H 35H 46H 03H
152H
Lower 2 digits 52 is sent after conversion into ASCII code [5][2].
Description
ETX Check
E
[F] [5] [2]
T
X
46H 03H
8 - 7
Remarks
Positive response
Negative response