ABB +Q951 Original User Manual page 18

18
This table describes the status LEDs of the safety relay [A61].
CH1 Mode
off off
green green
off flash
green
off flash
green
green flash
green
off blue
off blue
green blue
green blue
green blue
fast flash blue
green
fast flash blue
green
off flash blue
off flash blue
green flash blue
red fast flash
blue
red flash red
red fast flash
red
red fast flash
red
fast flash fast flash
red red
For more information see
Option description and instructions
CH2 Comment
off The safety relay is not powered.
green CH1 and CH2 accepted.
Reset done and outputs activated.
off CH1 and CH2 unaccepted. A timer
function is counting down while the
safety relay remains activated.
green CH1 unaccepted and CH2 accepted. A
timer function is counting down while
the safety relay remains activated.
off CH1 accepted and CH2 unaccepted. A
timer function is counting down while
the safety relay remains activated.
off No channels accepted.
green CH1 unaccepted, CH2 accepted
off CH1 accepted, CH2 unaccepted
green CH1 and CH2 accepted, the safety
relay wait for reset.
fast flash Two-channels error: CH2 has been
green unaccepted and then accepted again
while CH1 remained accepted.
green Two-channels error: CH1 has been
unaccepted and then accepted again
while CH2 remained accepted.
fast flash Reading error on R1 and R2.
green
off CH1 and CH2 unaccepted, a timer
function is counting down while
remaining deactivated.
green CH1 unaccepted and CH2 accepted, a
timer function is counting down while
remaining deactivated.
off CH1 accepted and CH2 unaccepted, a
timer function is counting down while
remaining deactivated.
red Failsafe mode, a new setting has
been stored.
red Failsafe mode, the system is waiting
for a new setting.
red The safety relay is in failsafe mode.
fast flash Failsafe mode due to short circuit
red between CH2 and 24 VDC or T1
red Failsafe mode due to short circuit
between CH1 and 24 VDC or T2
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Action
Check A1–A2 voltage and
connections.
Check CH1 and CH2
Check CH1
Check CH2
Check reset settings, wiring
and reset circuit.
Check installation. Restore
by opening and closing
both CH:s at the same time.
Check installation. Restore
by opening and closing
both CH:s at the same time.
Check installation. Restore
by opening and closing
both CH:s at the same time.
Power cycle the unit to use
the stored setting.
Enter and store a new
setting.
Check error codes and
installation.
Check error code.
Check and remove the short
circuit.
Check error code.
Check and remove the short
circuit.