Operation manual Profibus PBD 100
23.07.2007
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10
Safety function
The safety function permits the start of emergency operations in case of special events, e.g. when communication between the actuator and
the master is interrupted. This function is set with the parameters 6 to 10. The safety function can only be set off when the watchdog function
is activated in the master. When the actuator is in safety mode, it tries to reach the set safety position by performing an electrical operation. If
the actuator is afterwards moved from the safety position (e.g. by manual operation) it independently tries to reach the safety position again
when in local control setting ‘Remote’.
The following events can trigger the safety mode:
The connection to the master is interrupted.
The master goes into Clear state and sends:
Either
a) global control telegrams with the content Clear.
or
b) data telegrams of the length 0 (DP fail safe mode).
As soon as the cause for triggering the safety mode is eliminated (connection restored, master in state Operate), the run commands from the
master can again be executed.
11
Trouble shooting and corrective actions
11.1
Optical signals during operation
Figure E: PROFIBUS-DP board
LED ‘SYSTEM OK’ (V1)
This LED shows the correct voltage supply to the PROFIBUS DP board. Is continuously illuminated: Power
supply available at PROFIBUS-DP board. is blinking: No Eprom used or Eprom defective. Is not illuminated: No
voltage at the DP board.
LED (V2)
This LED indicates a run command in direction OPEN. Is continuously illuminated: Run command in direction
OPEN is being executed. Is not illuminated: No run command in direction OPEN active.
LED (V3)
This LED indicates a run command in direction CLOSE. Is continuously illuminated: Run command in direction
CLOSE is being executed. Is not illuminated: No run command in direction CLOSE active.
LED ‘LocErr’ (V5)
This LED indicates local faults in the actuator. A fault with higher blinking frequency is more serious than a fault
with lower blinking frequency.
Blinking once: TH fault (Thermo fault) actuator has stopped, motor overheating (motor protection
).
Blinking twice: STE fault (electrical fault) phase failure
Blinking 3 times: DÖL fault (torque switch opening left) Unexpected torque in direction OPEN.
Blinking 4 times: DSR fault (torque switch closing right) Unexpected torque in direction CLOSE.
Blinking 5 times: Supply voltage failure (24V) Supply voltage of the PROFIBUS-DP board higher than 30 V or
lower than 18 V.
Blinking 6 times: Slave is in CLEAR state
Haselhofer
Profibus PBD 100
V8 V7 V6 V5
