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

LED
LEDs unlit

POWER flashing

PNOZ e1p: CH.1 and Ch.2 periodically flash at
the same time
All units
and CH.2 flash alternately

PNOZ e6.1p, PNOZ e6vp: CH.1 and CH.2 flash
alternately

PNOZ e2.1p, PNOZ e2.2p: CH.1
briefly (50 ms on, 250 ms off)
PNOZ e2.1p, PNOZ e2.2p: CH.1
flash briefly (50 ms on, 250 ms off)
CH.1 or CH.2 flash a code

Table 1: Display of fault conditions

except except

except PNOZ e6.1p, PNOZ e6vp: CH.1

except except

or or

or CH.2 flashes

or or

and and

and CH.2

and and

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

Error
Supply voltage is missing, too low, wrongly
connected

Unknown operating mode, initialisation phase, start
not executed
Error in the wiring of input circuit S11, S12, S21,
S22

1.) Feedback loop open on start-up

2.) Only one channel of the input circuit is open or
is partially operated

1.) Feedback loop open on start-up

2.) Only one channel of the input circuit is open or
is partially operated

3.) External feedback loop closed on start-up, but
internal feedback loop faulty
Simultaneity conditions not met

A pushbutton is defective or there is a wiring error

Error coding, see Table 3

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

INFORMATION

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

Remedy
Apply supply voltage: A1 - +24 VDC and
A2 - 0 VDC
Permitted voltage range: 19.2 ... 30 VDC
Depending on operating mode: Press reset button
or perform start-up test
Rectify wiring error, restart unit

1.) Close feedback loop, open input circuit, start
unit again

2.) Open both input circuit channels

1.) Close feedback loop, open input circuit, start
unit again

2.) Open both input circuit channels

3.) No remedy available to user - send unit to Pilz

Release the two-hand button and press it again.

Change pushbutton or rectify wiring error

See Table 3

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

Fig. 2: Error code 1

I

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

II

Á

Â

I

II

IV

III

Ã

IV

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 45678910111213141516
Decimal error code 1 2 3 4567891011121314150

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

1001137-EN-01-2008-03Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany, Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]