Diagnosis

In cases of short circuit or overload, the digital outputs are turned off. The modules performs reactivation automatically. Thus an acknowledgement of the errors is not necessary. The error message is stored via the LED.

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	PNIO diagnosis block
Class	Interface	Device	Module	Channel	Error- Identifier	Error message		Remedy
	*1)	*2)	*3)	*4)
Module errors CI592-CS31
3	11	ADR	31	31	19	Checksum error in the I/O module		Replace I/O module
3	11	ADR	31	31	3	Timeout in the I/O module
3	11	ADR	31	31	40	Different hard-/firmware versions in the module
3	11	ADR	31	31	43	Internal error in the module
3	11	ADR	31	31	36	Internal data exchange failure
3	11	ADR	31	31	9	Overflow diagnosis buffer		Restart
3	11	ADR	31	31	26	Parameter error		Check Master
3	11	ADR	31	31	11	Process voltage UP too low		Check process supply voltage
3	11	ADR	31/1..7	31	17	No communication with I/O device		Replace I/O module
3	11	ADR	1..7	31	32	Wrong I/O device type on socket		Replace I/O module / Check configuration
4	11	ADR	31	31	45	Process voltage UP OFF		Turn process voltage ON
4	11	ADR	1..7	31	31	At least one module does not support failsafe function		Check modules and parameterization
4	11	ADR	31/1..7	31	34	No response during initialization of the I/O module		Replace I/O module
Channel error digital CI592-CS31
4	11	31	31/1..7	14..21   *5)	47	Short circuit at digital output		Check terminals
Channel error analog CI592-CS31
4	11	31	31/1..7	8..11   *6)	48	Analog value overflow or broken wire at an analog input		Check value or check terminals
4	11	31	31/1..7	8..11   *6)	7	Analog value underflow at an analog input		Check value
4	11	31	31/1..7	8..11   *6)	47	Short-circuit at an analog input		Check terminals
4	11	31	31/1..7	12..13   *7)	4	Analog value overflow at an analog output		Check output value
4	11	31	31/1..7	12..13   *7)	7	Analog value underflow at an analog output		Check output value

Remarks:

*1)	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.
*2)	With “Device” the following allocation applies: 31 = Module itself, 1..7 = Expansion module 1..7, ADR = Hardware address (e.g. of the DC551)
*3)	With “Module” the following allocation applies: 31 = Module itself; 1..7 = Expansion 1..7
*4)	In case of module errors, with channel “31 = Module itself” is output.
*5)	Ch = 14..21 indicates the digital inputs/outputs DC8..DC15
*6)	Ch = 8..11 indicates the analog inputs AI0..AI3
*7)	Ch = 12..13 indicates the analog outputs AO0..AO1