Fault type
Brief description
Cause
Troubleshooting
L2
Invalid configuration of
the external device
monitoring (EDM)
The configuration of the external
device monitoring (EDM) is invalid.
The configuration is unsuitable for
the wiring.
b
Check whether the external
device monitoring is connected
correctly.
b
Use Safety Designer to check the
configuration.
L3
Fault in the exter‐
nal device monitoring
(EDM)
A faulty signal is applied at the
external device monitoring (EDM).
The allowed tolerance time has
been exceeded.
b
Check whether the connectors
are wired correctly and operating
correctly.
L8
Fault in the reset input
An invalid signal is applied at a reset
input. The reset signal is applied for
too long.
b
Check the reset pushbutton, the
wiring, and any other compo‐
nents affected.
L9
Short-circuit at the
reset input
Exactly the same signal is applied at
a reset input as at another input, an
OSSD or an output. There is possibly
a short-circuit.
b
Check the wiring for cross-cir‐
cuits.
M1
Incompatible configura‐
tion of the data output
The data output is configured in a
way that the device does not sup‐
port (e.g., invalid start angle).
b
Reconfigure the data output.
M2
Data output: Data
packets lost
The data output could not transmit
all data packets (e.g., buffer mem‐
ory full).
b
Configure the data output so that
less data is transmitted.
M3
Configuration not veri‐
fied
The configuration is not verified.
b
Verify the configuration.
N1
Invalid input signal
The signal applied at the control
inputs is not assigned to a monitor‐
ing case. The signal is applied for
longer than the set input delay +1 s.
b
Check the configuration with
Safety Designer.
b
Check the working process of the
machine.
N2
Incorrect switching
sequence
The configured switching sequence
was interrupted by the new monitor‐
ing case.
b
Check the machine’s work proc‐
ess.
b
Change the configured switching
sequence monitoring.
N3
Invalid input signal
The signal applied at the static con‐
trol inputs does not match the com‐
plementary condition. The signal is
applied for longer than 1 s.
The input signal for switching
between monitoring cases received
via the network is invalid. The invalid
signal is applied for longer than 1 s.
b
Check the control of the control
inputs.
b
Check the control over the net‐
work.
N4
Incorrect activation of
the control inputs via
the network
The input signal for activating
switching between monitoring cases
received via the network is invalid.
The invalid signal is applied for lon‐
ger than 1 s.
b
Check the control over the net‐
work.
N5
Invalid input signal
The input signal for switching
between monitoring cases received
via the network is invalid. The invalid
signal is applied for longer than 1 s.
b
Check the control over the net‐
work.
N6
Invalid monitoring case
number
The monitoring case number
received via the network does not
match the configuration of the
device. The incorrect number is
applied for longer than 1 s.
b
Check the configuration with the
Safety Designer.
b
Check the control over the net‐
work.
11
TROUBLESHOOTING
170
O P E R A T I N G I N S T R U C T I O N S | microScan3 Pro I/O
8025424/1ELL/2022-01-21 | SICK
Subject to change without notice
