8.4.3.
Check SIL fault signal “Actuator monitoring”
Configuration
This test is required for the following versions or configurations:
●
Safe ESD function “Safe CLOSING” (Safe ESD in direction CLOSE)
●
Safe ESD function “Safe OPENING” (Safe ESD in direction OPEN)
Test procedure
If the motor does rotate within a defined time once safety operation was triggered,
a SIL fault must be signalled.
Test sequence
1.
Operate actuator in mid-position or at sufficient distance from the end positions.
2.
Lock handwheel with the “Handwheel lockable” option padlock, so that the
manual drive remains engaged.
3.
Start Safe ESD safety operation:
→
Set
Safe ESDa
and
Safe ESDb
input signals to 0 V (low).
➥
The SIL fault signal is correct, if a SIL fault signal is sent within four seconds
via the
SIL failure
output.
4.
Once the test is complete set
Safe ESDa
and
Safe ESDb
input signals to
+24 V DC (high) and disable motor lock.
8.4.4.
Check Safe ESD reaction for “Motor protection (thermal fault)” signals
Configuration
This test is required for the following versions or configurations:
●
Safe ESD function “Safe CLOSING” (Safe ESD in direction CLOSE)
●
Safe ESD function “Safe OPENING” (Safe ESD in direction OPEN)
Test procedure
In order to protect against overheating and impermissibly high surface temperatures
at the actuator, PTC thermistors or thermoswitches are embedded in the motor
winding. Motor protection trips as soon as the max. permissible winding temperature
has been reached.
For a safety operation via Safe ESD function, the actuator reaction for motor protection
tripping depends on the “SIL motor protection” configuration:
●
For “SIL motor protection” = active configuration
= safety operation is stopped.
●
For “SIL motor protection” = inactive configuration
= safety operation is not stopped.
The test is performed by simulating the motor protection signal via AC 01.2 local
controls:
Required user level:
Specialist (4)
or higher.
Diagnostics M0022
Proof test (motor prot.) M1021
Simulation value:
Thermal test
Figure 13: Display indication on local controls
The simulation (active/inactive) is activated and deactivated by push button
Ok
.
A dot on the display indicates that the simulation is active.
Black dot (
●
): Motor protection simulation active (thermal fault)
White dot (
○
): Signal not active
Test sequence
1.
Operate actuator in mid-position or at sufficient distance from the end positions.
31
Part-turn actuators
with AC 01.2-SIL/ACExC 01.2-SIL
Tests and maintenance
