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 CD522
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	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
Channel error CD522
4	14	1..10	1	0…15	47	Output short circuit		Check output connection or terminal
	11 / 12	ADR	1..10
4	14	1..10	1	0, 1, 8, 9	10	Input frequency too high		Check frequency filter parameter or sensor
	11 / 12	ADR	1..10
4	14	1..10	1	0, 1	2	PWM frequency too high		Clamp min/max value in program
	11 / 12	ADR	1..10
4	14	1..10	1	0, 1	10	PWM duty cycle out of range (0-1000)		Clamp min value to 0 in program
	11 / 12	ADR	1..10
4	14	1..10	1	0, 1	11	5 V sensor supply too low		Check wiring & sensor power
	11 / 12	ADR	1..10
4	14	1..10	1	0, 1	18	Internal fuse on 0 V has blown, 0 V not connected to GND		Check wiring, replace module
	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 (2 = DO); COM1/COM2: 1..10 = Expansion 1..10
	In case of module errors, with channel “31 = Module itself” is output.