2. Execute operation command in opposite direction of the configured ESD safety
function:
→
For "Safe CLOSING" (Safe ESD in direction CLOSE) configuration:
Start operation command in direction OPEN.
→
For "Safe OPENING" (Safe ESD in direction OPEN) configuration: Start
operation command in direction CLOSE.
Information:For the test, operation commands (in directions OPEN or CLOSE)
can be executed both from remote (via DCS) and from Local at the controls
(via the push buttons of the local controls).
3. Start safety operation during operation:
→
Set Safe ESDa and Safe ESDb input signals to 0 V (low).
➥
Safety function is correct, if the actuator stops and performs a safety operation
into the configured direction.
➥
No SIL fault signal may be issued.
4.
Set Safe ESDa and Safe ESDb input signals to +24 V DC (high) after the
test.
8.4.2. SIL fault signal "Actuator monitoring": check
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 procedure
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.
8.4.3. Safe ESD reaction for "Motor protection (thermal fault)" signals: check
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.
Diagnostic M0022
26
Multi-turn actuators
Tests and maintenance SA 07.2 – SA 16.2/SAR 07.2 – SAR 16.2
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