Mitsubishi Electronics QJ71C24/-R2, QJ71C24N, SH-080007 manual 267

10 TROUBLESHOOTING

MELSEC-Q

Error code								Protocol
	Error			Signal				Non
(Hexa-			Error Contents			Corrective action			Bidire-
				name			MC	Proce-
decimal)									ctional
								dure
		• A nonexistent extension file register block No. was
	Extension R block		designated.		•	Correct the designated block
7148H		•	A block No. being used as an extension comment	PRO		No. and restart data
	No. error		area, sampling trace area, or status latch area was			communications.
			designated.
7149H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
		•	A write command was designated when "Disable		• Change the setting to "Enable
	Cannot execute a					write during RUN" and restart
			write during RUN" was set.
714AH	command during			C/N		data communications.
		•	Parameter or sequence program was written during
	RUN				• Stop the CPU and restart data
			RUN.
						communications.
714BH
to	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
714DH
					• Check and correct the other
714EH	Monitor network	•	The written monitor network No. and the monitor	C/N		station access valid module No.
	No. error		request network No. are different.			in the network parameters.
					•	Rewrite the monitor data.
7150H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
	PLC No.	•	A PLC No. other than "FF" or "0 to 64(00H to 40H)"		• Check and correct the external
7151H				C/N		device transmit message and
	designation error		was designated.
						restart data communications.
7152H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
					•	Review the transmission
		•	The received message length has exceeded the	CHn		message.
7153H	Frame length error				•	Correct the message format so
			allowable range.	ERR.
						the number of access points is
						within the allowable range.
7154H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
	Unwritten monitor	•	Monitoring was requested before monitor data was		• Write the device to be monitored
7155H				PRO		before issuing a monitor
	data error		written.
						request.
7156H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
					• If there is an error in the CPU,
7160H	PLC access error	•	CPU model name cannot be confirmed.	C/N		remove the CPU error and
						restart data communications.
7161H
to	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
7163H
					•	Check the transmission
		•	Either the request or the device designation method			message/request from the
7164H	Request error					external device, make the
			is wrong.
						necessary corrections, and send
						again.
7166H	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
		•	A write command was designated when "Disable		• Change the setting to "Enable
7167H	Cannot execute a			C/N		write during RUN" and restart
			write during RUN" was set.
	command during					data communications.
7168H	RUN	•	A command that cannot be executed during RUN	C/N	•	Stop the CPU and restart data
			was designated.			communications.
					• If there is an error in the CPU,
7169H	CPU error	•	Cannot communicate normally with the CPU.	C/N		remove the CPU error and
						restart data communications.
716AH
to	System error	•	The OS of the Q series C24 detected some error.	—	(	1)
716CH
716DH		• Monitor data was not written using QnA compatible		PRO
	Monitor data write		2C/3C/4C frame.
					•	Rewrite monitor data.
716EH	error	•	Monitor data was not written using A compatible 1C	PRO
			frame.

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