Use Of The Safety Function; Activating; Resetting; Pous Indications - ABB DCS8 Series Original User Manual

Use of the safety function

Activating

1. Lock the POUS key switch. The switch locks in "ON" (open) position.

Resetting

1. Unlock the POUS switch until it releases.
2. Push the POUS reset button [S7x] (if installed). The indication lamp [P7x] goes out, the POUS
deactivates.
Note: You must push the reset button [S7x] for 0.1 to 3 seconds.
3. Reset the drive if necessary.
4. Make sure that the drive has received the start signal (depends on the configuration, see the
firmware manual).
5. You can now restart the drive.
Note: You have to reset the POUS circuit with the reset button [S7x] also after you have powered up the
drive.

POUS indications

When the POUS is on:
−
the drive control program has the warning Safe torque off active,
−
the POUS indication lamp [P7x] is illuminated,
−
the mode LED of the safety relay [A65] is steady blue.

+Q957 Fault tracing

This table describes the status LEDs of the emergency stop safety relay [A65].
CH1 Mode
off off
green green
flash
off green
flash
off green
flash
green green
off blue
off blue
green blue
green blue
green blue
CH2 Status
off The safety relay is not powered.
CH1 and CH2 accepted. Reset made
green and outputs activated.
CH1 and CH2 unaccepted. A timer
function is counting down while the
off safety relay remains activated.
CH1 unaccepted and CH2 accepted.
A timer function is counting down
while the safety relay remains
green activated.
CH1 accepted and CH2 unaccepted.
A timer function is counting down
while the safety relay remains
off activated.
off No channels accepted.
green CH1 unaccepted, CH2 accepted
off CH1 accepted, CH2 unaccepted
CH1 and CH2 accepted, the safety
green relay waits for reset.
Two-channels error: CH2 has been
fast flash unaccepted and then accepted
green again while CH1 remained accepted.
3ADW000504R0301 +Q957 Prevention of unexpected start-up en c
Action
Check A1–A2 voltage and
connections.
Check CH1 and CH2
Check CH1
Check CH2
Check reset settings, wiring
and reset/test circuit
Check installation. Restore by
opening and closing both
CH:s at the same time.
Option description and instructions
13