8.3
Corrective action
Error message
SF LED
Error
Diagnosis
Device response
Simultaneity of protective
door not fulfilled
Red
Simultaneity was not
fulfilled
Check position switch
Restart or reset
Speed sensor defective
Red
Parameterized speed
sensor does not return a
signal or returns an in‐
correct signal
• Check plug-in connection
or terminal connection
• Check signal cables
• Check speed sensor
Restart or reset
Fault on external contac‐
tors (switch off)
Red
Device stopped and RF
contacts do not close
• Check connection cables
• Check contactors
Device switches to the safe
state. Restart or reset fol‐
lowing correction of the
fault
Fault in the feedback cir‐
cuit (RF)
Red
Impermissible signal on
RF
• Check wiring (wire break
or short-circuit)
Device switches to the safe
state. A restart is necessary
following correction of the
fault
Fault at the position
switch input (P1/P2)
Red
Impermissible signal at
the position switch in‐
put
• Check wiring (wire break
or short-circuit/cross-cir‐
cuit)
Device switches to the safe
state. A restart or reset is
necessary following correc‐
tion of the fault
Fault at the start input (ST) Red
Impermissible signal at
the start input
• Check wiring (wire break
or short-circuit/cross-cir‐
cuit)
Device switches to the safe
state. A restart or reset is
necessary following correc‐
tion of the fault
Fault at the setup/auto‐
matic input (EA1/EA2)
Red
Impermissible signal at
the setup/automatic in‐
put
• Check wiring (wire break
or short-circuit/cross-cir‐
cuit)
Device switches to the safe
state. A restart is necessary
following correction of the
fault
Fault at the magnet con‐
tact input (MAG)
Red
Impermissible signal at
the magnet contact in‐
put
• Check wiring (wire break
or short-circuit/cross-cir‐
cuit)
Device switches to the safe
state. A restart or reset is
necessary following correc‐
tion of the fault
Fault in the cable connec‐
tion to the adapter
(3TK2810-1A,
3TK2810-1B)
Red
Fault in the cable con‐
nection to the adapter
(3TK2810-1A,
3TK2810-1B)
• Check plug-in connectors
of the connecting cable
• Check connecting cable
• Check power supply of the
adapter
Device switches to the safe
state. A restart or reset is
necessary following correc‐
tion of the fault
Feedback circuit 1 does
not close in time
Red
Switch-off monitoring
time exceeded
• Check wiring at the out‐
puts (short-circuit)
• Check external contactors
Device switches to the safe
state. A restart or reset is
necessary following correc‐
tion of the fault
Diagnostics/troubleshooting
8.3 Corrective action
3TK2810-1 safety-related speed monitor
Equipment Manual, 05/2020, NEB926246402000/RS-AE/007
65