Pilz PNOZe1p24VDC2so User Manual

PNOZelog

Fault diagnostics

During operation, 3 LEDs indicate the units’ operating status and the fault conditions. The unit is ready for operation when:

●The “POWER” LED lights up and

●The LEDs “CH.1” and “CH.2” are both lit (high signal at the safety outputs)

or

●The LEDs “CH.1” and “CH.2” are both out (low signal at the safety outputs).

LED CH.1 is assigned to safety output 14, LED CH.2 to safety output 24.

INFORMATION

Supply interruptions lasting longer than 20 ms are detected as an error. The LEDs indicate an error and the safety outputs carry a low signal. The plant or machinery driven via the safety outputs will be shut down. The unit can only be restarted by switching the supply voltage off and then on again.

Errors

Fault conditions are indicated by flashing the LEDs. Some errors are displayed through periodic flashing (see Table 1); with other errors it is possible to establish an error code through the number of flashes (Table 2).

These errors are always indicated by three short flashes at LED CH.1 or CH.2. After a longer pause, the LED will then flash at one

second intervals. The number of LED flashes corresponds to a digit in the error code. The error code can consist of up to 4 digits. The digits are separated by a longer period without flashing. The entire sequence is constantly repeated.

The error code can also be read into a PLC via the diagnostic output. In this case the error code will appear as a hexadecimal sequence. The process of reading and

transferring data to a PLC is described in the PLC Drivers manual.

INFORMATION

Leading zeros are not transmitted. Error code 0: 16 flashes

LED	Error	Remedy
LEDs unlit	Supply voltage is missing, too low, wrongly	Apply supply voltage: A1 - +24 VDC and
	connected	A2 - 0 VDC
		Permitted voltage range: 19.2 ... 30 VDC
POWER flashing	Unknown operating mode, initialisation phase, start	Depending on operating mode: Press reset button
	not executed	or perform start-up test
PNOZ e1p: CH.1 and Ch.2 periodically flash at	Error in the wiring of input circuit S11, S12, S21,	Rectify wiring error, restart unit
the same time	S22
All units except PNOZ e6.1p, PNOZ e6vp: CH.1	1.) Feedback loop open on start-up	1.)	Close feedback loop, open input circuit, start
and CH.2 flash alternately	2.) Only one channel of the input circuit is open or	unit again
	is partially operated	2.)	Open both input circuit channels
PNOZ e6.1p, PNOZ e6vp: CH.1 and CH.2 flash	1.) Feedback loop open on start-up	1.)	Close feedback loop, open input circuit, start
alternately	2.) Only one channel of the input circuit is open or	unit again
	is partially operated	2.)	Open both input circuit channels
	3.) External feedback loop closed on start-up, but	3.)	No remedy available to user - send unit to Pilz
	internal feedback loop faulty
PNOZ e2.1p, PNOZ e2.2p: CH.1 or CH.2 flashes	Simultaneity conditions not met	Release the two-hand button and press it again.
briefly (50 ms on, 250 ms off)
PNOZ e2.1p, PNOZ e2.2p: CH.1 and CH.2	A pushbutton is defective or there is a wiring error	Change pushbutton or rectify wiring error
flash briefly (50 ms on, 250 ms off)
CH.1 or CH.2 flash a code	Error coding, see Table 3	See Table 3

Table 1: Display of fault conditions

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany, Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

1001137-EN-01-2008-03

PNOZelog

Fault diagnostics

Examples

Error code 1, 3:

LED CH.1 or CH.2 flashes

●3 times, briefly

●Pause

●Once for one second

●Pause

●3 times for one second each

Error code 1:

LED CH.1 or CH.2 flashes

●3 times, briefly

●Pause

●Once for one second

Error code 1, 0:

LED CH.1 or CH.2 flashes

●3 times, briefly

●Pause

●Once for one second

●Pause

●16 times for one second each

Fig. 1: Error code 1, 3
	À		Á		Â		Ã

I		II		IV

Fig. 2: Error code 1

I		II		III		IV

Fig. 3: Error code 1, 0

I Code for error message

II Code for 1st digit

III Code for 2nd digit

IV Code for error message repeated

Table 2 shows the relationship between the number of flashes and the error code.

The key to the error code is described overleaf in Table 3.

Number of flashes	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
Decimal error code	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	0

Table 2: Relationship between number of flashes and decimal error code

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany, Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

1001137-EN-01-2008-03