Structure of the Diagnosis Block via PNIO_DEV_ALARM \ Function Block

Byte Number	Description	Possible Values
1	Diagnosis Byte, slot number	31 = CI501-PNIO (e. g. error at integrated 8 DI / 8 DO) 1 = 1st connected S500 I/O Module … 10 = 10th connected S500 I/O Module
2	Diagnosis Byte, module number	According to the I/O Bus specification passed on by modules to the fieldbus master
3	Diagnosis Byte, channel	According to the I/O Bus specification passed on by modules to the fieldbus master
4	Diagnosis Byte, error code	According to the I/O Bus specification Bit 7 and bit 6, coded error class 0 = E1 1 = E2 2 = E3 3 = E4 Bit 0 to Bit 5, coded error description
5	Diagnosis Byte, flags	According to the I/O-Bus specification Bit 7: 1 = coming error Bit 6: 1 = leaving error

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 4 Bit 6..7	-	Byte 1	Byte 2	Byte 3	Byte 4 Bit 0..5	PNIO diagnosis block
Class	Interface	Device	Module	Channel	Error- Identifier	Error message		Remedy
	1)	2)	3)
Module errors
3	-	31	31	31	19	Checksum error in the I/O module		Replace I/O module
3	-	31	31	31	3	Timeout in the I/O module
3	-	31	31	31	40	Different hard-/firmware versions in the module
3	-	31	31	31	43	Internal error in the module
3	-	31	31	31	36	Internal data exchange failure
3	-	31	31	31	9	Overflow diagnosis buffer		Restart
3	-	31	31	31	26	Parameter error		Check Master
3	-	31	31	31	11	Process voltage UP too low		Check process supply voltage
3	-	31	31	31	45	No process voltage UP		Check process supply voltage
3	-	31	31/1..10	31	17	No communication with I/O device		Replace I/O module
3	-	31	1..10	31	32	Wrong I/O device type on socket		Replace I/O module / Check configuration
4	-	31	1..10	31	31	At least one module does not support failsafe function		Check modules and parameterization
4	-	31	31	31	46	Voltage feedback on activated digital outputs DO0..DO7 on UP3 4)		Check terminals
4	-	31/1…10	31	31	34	No response during initialization of the I/O module		Replace I/O module
4	-	31	31	31	11	Process voltage UP3 too low		Check process supply voltage
4	1…6	255	2	0	45	The connected Communication Module has no connection to the network		Check cabeling
4	-	31	31	31	45	No process voltage UP3		Check process supply voltage
4	-	31	31	31	10	Voltage overflow on outputs (above UP3 level) 5)		Check terminals/ check process supply voltage
Channel error digital
4	-	31	2	0…7	46	Externally voltage detected at digital output DO0..DO7 6)		Check terminals
4	-	31	2	0…7	47	Short circuit at digital output 7)		Check terminals
Channel error analog
4	-	31	1	0..3	48	Analog value overflow or broken wire at an analog input		Check value or check terminals
4	-	31	1	0..3	7	Analog value underflow at an analog input		Check value
4	-	31	1	0..3	47	Short-circuit at an analog input		Check terminals
4	-	31	3	0..1	4	Analog value overflow at an analog output		Check output value
4	-	31	3	0..1	7	Analog value underflow at an analog output		Check output value

Remarks:

1)	In AC500 the following interface identifier applies: “-” = Diagnosis via bus-specific function blocks; 0 … 4 or 10 = Position of the Communication Module;14 = I/O-Bus; 31 = Module itself The identifier is not contained in the CI501-PNIO diagnosis block.
2)	With “Device” the following allocation applies: 31 = Module itself; 1..10 = Expansion module
3)	With “Modul” the following allocation applies: 31 = Module itself Module type (1 = AI, 2 = DO, 3 = AO)
4)	This message appears, if externally voltages at one or more terminals DO0..DO7 cause that other digital outputs are supplied through that voltage CI501-PNIO. All outputs of the apply digital output groups will be turned off for 5 seconds. The diagnosis message appears for the whole output group.
5)	The voltage on digital outputs DO0..DO7 has overrun the process supply voltage UP3 CI501-PNIO. Diagnosis message appears for the whole module.
6)	This message appears, if the output of a channel DO0..DO7 should be switched on while an externally voltage is connected. In this case the start up is disabled, as long as the externally voltage is connected. Otherwise this could produce reverse voltage from this output to other digital outputs. This diagnosis message appears per channel.
7)	Short circuit: After a detected short circuit, the output is deactivated for 100ms. Then a new start up will be executed. This diagnosis message appears per channel.