Diagnosis

In case of overload or short-circuit, the outputs switch off automatically and try to switch on again cyclically. Therefore an acknowledgement of the outputs is not necessary. The LED error message, however, is stored.

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
	1)	2)	3)	4)
Module error
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		New start
3	11	ADR	31	31	26	Parameter error		Check master
3	11	ADR	31	31	11	Process voltage too low		Check process voltage
3	11	ADR	1…7	31	17	No communication to the I/O module		Replace I/O module
4	11	ADR	31	31	45	Process voltage ON/OFF		Process voltage ON
4	11	ADR	31/1..7	31	34	No reply at initialization of the I/O module		Replace I/O module
4	11	ADR	31/1.7	31	32	Wrong I/O module in the slot		Replace I/O module or check configuration
Channel error DC551-CS31
4	11	ADR	31/1..7	8..23	47	Short-circuit at a digital output		Check connection

Remarks:

1)	In AC500 the following interface identifier applies: 11 = COM1 (protocol CS31 bus only possible with COM1)
2)	With “Device” and CS31 bus master, the hardware address of the DC551-CS31 (0…69) is output.
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.