Mitsubishi Electronics MR-J2S- A instruction manual Error codes, Checksum range, Soh

14. COMMUNICATION FUNCTIONS

14.5 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 error code sent in upper case indicates that the servo is normal and the one in lower case indicates that an alarm occurred.

Error code		Error name	Description	Remarks
Servo normal	Servo alarm
[A]	[a]	Normal operation	Data transmitted was processed properly.	Positive response
[B]	[b]	Parity error	Parity error occurred in the transmitted data.
[C]	[c]	Checksum error	Checksum error occurred in the transmitted data.
[D]	[d]	Character error	Character not existing in the specifications was
			transmitted.
				Negative response
[E]	[e]	Command error	Command not existing in the specifications was
			transmitted.
[F]	[f]	Data No. error	Data No. not existing in the specifications was
			transmitted.

14.6 Checksum

Checksum range

Station number

or

group

STX or

SOH

ETX Check

Checksum range

The check sum is a JIS8-coded hexadecimal representing the lower two digits of the sum of JIS8-coded hexadecimal numbers up to ETX, with the exception of the first control code (STX or S0H).

(Example)

S							E
T	[0]	[A]	[1]	[2]	[5]	[F]	T
X							X

[5] [2]

02H 30H 41H 31H 32H 35H 46H 03H

30H 41H 31H 32H 35H 46H 03H 152H

Lower 2 digits 52 is sent after conversion into ASCII code [5][2].

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