Diagnosis and Display

Diagnosis:

E1..E4	d1	d2	d3	d4	Identifier 000..063	AC500 display	<− Display in
Class	Comp	Dev	Mod	Ch	Err	PS501 PLC browser
Byte 6 Bit 6..7	-	Byte 3	Byte 4	Byte 5	Byte 6 Bit 0..5	FBP diagnosis block
Class	Interface	Device	Module	Channel	Error Identifier	Error message		Remedy
Module error AX521
3	14	1..10	31	31	19	Checksum error in the I/O module		Replace I/O module
	11 / 12	ADR	1..10
3	14	1..10	31	31	3	Timeout  in the I/O module		Replace I/O module
	11 / 12	ADR	1..10
3	14	1..10	31	31	40	Different hard-/firmware versions in the module		Replace I/O module
	11 / 12	ADR	1..10
3	14	1..10	31	31	43	Internal error in the module		Replace I/O module
	11 / 12	ADR	1..10
3	14	1..10	31	31	36	Internal data exchange failure		Replace I/O module
	11 / 12	ADR	1..10
3	14	1..10	31	31	9	Overflow diagnosis buffer		New start
	11 / 12	ADR	1..10
3	14	1..10	31	31	26	Parameter error		Check master
	11 / 12	ADR	1..10
3	14	1..10	31	31	11	Process voltage too low		Check process voltage
	11 / 12	ADR	1..10
4	14	1..10	31	31	45	Process voltage is switched off (ON −> OFF)		Process voltage ON
	11 / 12	ADR	1..10
Channel error AX521
4	14	1..10	1	0…3 0…7	48	Analog value overflow or broken wire at an analog input		Check input value or terminal
	11 / 12	ADR	1..10
4	14	1..10	1	0…3 0…7	7	Analog value underflow at an analog input		Check input value
	11 / 12	ADR	1..10
4	14	1..10	1	0…3 0…7	47	Short-circuit at an analog input		Check terminal
	11 / 12	ADR	1..10
4	14	1..10	3	0…3 0…7	48	Analog value overflow at an analog output		Check output value
	11 / 12	ADR	1..10
4	14	1..10	3	0…3 0…7	7	Analog value underflow at an analog output		Check output value
	11 / 12	ADR	1..10

Remarks:

	In AC500 the following interface identifier applies: 14 = I/O-Bus,  11 = COM1 (e.g. CS31 bus), 12 = COM2. The FBP diagnosis block does not contain this identifier.
	With “Device” the following allocation applies: 31 = Module itself, 1..10 = Expansion module 1..10, ADR = Hardware address (e.g. of the DC551)
	With “Module” the following allocation applies dependent of the master: Module error: I/O-Bus or FBP: 31 = Module itself; COM1/COM2: 1..10 = Expansion 1..10 Channel error: I/O-Bus or FBP = Module type (1 = AI, 3 = AO); COM1/COM2: 1..10 = Expansion 1..10
	In case of module errors, with channel “31 = Module itself” is output.

Displays:

During the power ON procedure, the module initializes automatically. All LEDs (except the channel LEDs) are ON during this time.

Status of the LEDs Diagnosis LEDsin the S500 system data)

LED	Status	Color	LED = OFF	LED = ON	LED flashes
Inputs 00…03	analog input	yellow	input is OFF	input is ON (brightness depends on the value of the analog signal)	–
Outputs 00…03	analog output	yellow	output is OFF	output is ON (brightness depends on the value of the analog signal)	–
UP	process voltage 24 V DC via terminal	green	process voltage is missing	process voltage OK	–
CH-ERR2	Channel Error, error messages in groups (analog inputs or outputs combined into the groups 2 and 4)	red	no error or process voltage is missing	serious error within the corresponding group	error on one channel of the group
CH-ERR4		red
CH-ERR *)	Module Error	red	–	internal error	–
*) Both LEDs (CH-ERR2 and CH-ERR4) light up together