Extended EMERGENCY operation behaviour "
ACTIVE
IMMEDIATELY
":
An EMERGENCY operation is only initiated when 0 V are connected to the
EMERGENCY signal input.
If the EMERGENCY operation behaviour "
ACTIVE
IMMEDIATE
" is switched on, an EMERGENCY operation is
initiated immediately after the actuator is switched on, when
0 V are connected to the EMERGENCY signal input.
EMERGENCY operation action:
The following actions (reactions of the actuator) can be programmed for an
EMERGENCY operation: (Parameter "
EMERGENCY POSITION
", page 32)
-
FAIL AS IS
:
the actuator stops in the current position
-
FAIL CLOSE
:
the actuator runs to end position CLOSED
-
FAIL OPEN
:
the actuator runs to end position OPEN
-
FAIL TO PRESET
:
the actuator runs to the predetermined position
EMERGENCY position
If the EMERGENCY operation action "
FAIL TO PRESET
" (parameter
"
EMERGENCY POSITION
") is set, the actuator runs to the EMERGENCY
position stated here.
Motor protection can be by-passed:
During the EMERGENCY operation the motor protection can be 'by-passed'.
(parameter "
EMERGENCY BY-PASS
", page 32)
16.5 Operation mode SAFETY
The operation mode FAILURE enables an initiation of safety operations in
case of cable break.
The following signals are monitored for cable break:
.
Input signal E2 (actual position value)
for example:
– Monitoring E2 (potentiometer in actuator)
Cable break is recognised
– Monitoring E2
(electronic position transmitter RWG 4 – 20 mA in actuator)
E2 lower than 3.7 mA = cable break
.
Profibus DP communication
Failure behaviour:
Failure behaviour "
GOOD SIGNAL FIRST
"
(Parameter "
FAILURE BEHAVIOUR
", page 32)
A safety operation is only initiated when no wire break is recognised after
switching on, but wire break is recognised later through loss of signal.
With this setting it is ensured that the actuator does not perform a
programmed safety action when switched on without signal E1 connected.
Failure behaviour "
FAIL IMMEDIATE
")
(Parameter "
FAILURE BEHAVIOUR
", page 32)
A safety operation is initiated in case of cable break.
If the extended failure behaviour is switched on (parameter
failure behaviour:
FAIL IMMEDIATELY
), a safety operation
is initiated immediately after the actuator is switched on if a
cable break has occurred.
53
Part-turn actuators SG 03.3 – SG 04.3
Operation instructions
with AUMATIC AC 01.1
Fig. P7