Mitsubishi Electronics PAC-YG63MCA instruction manual LED Display Designations

10LED Display Designations

The LEDs of this device indicate the upper/lower limit alarm interlock output status and error status of this device.

10-1.Alarm Setpoint Output and Error Displays

Display Item				Display LED	Content
					Note :On,		:Off,	:Flashing
Power supply status		(1)	Power supply to CPU	LED16		: Lights when the CPU is energized.
				(CPU power on)
						: Flashes during M-NET communication.
		(2)	Power supply to M-NET	LED17		: Lights when the M-NET is energized.
			circuit	(M-NET power on)
Output	Ch1, 2	(1)	Upper/lower limit alarm	LED03/02
						Output	Ch1		Ch2
status			interlock output status	(Output LEDs)
						Method	LED 03		LED 02
						Level	: Alarm output		: Alarm output
						Output	: Alarm stop		: Alarm stop
Error status (*1)		(1)	4-digit error code	LED12/13/14/15	Refer to "10-2. Sensor and Communication Error
				(Status display LEDs)	Displays".

*1: When a sensor error or communication error occurs, the error status is displayed.

10-2.Sensor and Communication Error Displays

If a sensor error or communication error occurs, a 4-digit error code will be repeatedly displayed according to the steps shown below.

"Sensor and Communication Error Displays" consist of the following 10 steps. This operation is performed repeatedly to indicate the 4-digit error code for the error.

					Note	:On, :Off, :Flashing
LED11	LED12	LED13	LED14	LED15
Common	Error code display (Binary number indication)				Function	Remark
	23=8	22=4	21=2	20=1
					"Sensor and
STEP1					Communication Error	LEDs 12 to 15 flash 3 times
					Displays"
					Starting Point Indication
STEP2					Blank	Turn Off
STEP3	/	/	/	/	Error code 1000's digit	Error code 1000's digit
						indication
						In the case of 6,
STEP4					Blank	Turn Off
STEP5	/	/	/	/	Error code 100's digit	Error code 100's digit
						indication
						In the case of 6,
STEP6					Blank	Turn Off
STEP7	/	/	/	/	Error code 10's digit	Error code 10's digit
						indication
						In the case of 0,
STEP8					Blank	Turn Off
STEP9	/	/	/	/	Error code 1's digit	Error code 1's digit indication
						In the case of 7,
STEP10					Blank	Turn Off

The error codes that are displayed for M-NET communication errors and sensor errors are as shown below.

Error Code	Description of Error	Error Code	Description of Error
6600	Multiple address error	6607	No ACK error
6601	M-NET polarity unset error	6608	No return of response frame
6602	Transmission processor hardware error	5010	Sensor trouble in Channel 1
6603	Transmission bus-busy error	5020	Sensor trouble in Channel 2
6606	Communications with transmission processor error

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