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Manual 35086
ProTech-GII with Math Functions
Woodward
119
If the frequency generator’s simulated speed level does not reach the module’s Overspeed Trip” setting
within 12 seconds, this test will be aborted and the module’s input speed channel will be switched back to
sensing actual rotating equipment speed.
The following Screen Messages may be seen on the Auto Simulated Speed Test page:
Auto Simulated Speed Active:
This message indicates the Auto Simulated Speed Test is active.
Test Ended by Modbus:
This message indicates the test was ended by a Modbus command.
Test Time Expired
:
This message
indicates the 12-second timer has reached zero before the simulated
speed level was raised above the Overspeed Trip setpoint.
Auto Simulated Speed Test Procedure
1. Verify no modules are in a Tripped or Alarmed state (depends on the configured Test Mode
Permissive setting).
2. From the module’s Auto Simulated Speed Test Screen, press the “Start Test” soft key or from the
Modbus interface (if write commands have been configured/enabled) give an “Initiate Auto Simulated
Speed Test” command then a “Confirm Auto Simulated Speed Test” command.
a. Note: This test routine can also be initiated by the Auto Sequence Test routine (periodically or
manually).
3. If the module’s front panel is used to initiate this test, then the “Password Entry” screen will appear.
Enter the Test Level Password.
4. If the front panel is used to initiate this test then press the “Apply” soft key to initiate this test or press
the “Cancel” soft key to exit the screen.
5. When this test routine is started, the module’s input speed channel is then switched from sensing
actual rotating equipment speed to sensing the module’s internal frequency generator which is
automatically set to a simulated speed of 100 RPM below the module’s “Overspeed Trip” level
setting.
a. The internal frequency generator will then automatically ramp the simulated speed signal at a
rate of 10 RPM/second up to and above the module’s Overspeed Trip level setting.
b. A 12-second timeout timer will start running.
6. If the modules frequency generator’s simulated speed signal increases up to or above the module’s
Overspeed Trip level, the module’s output “Trip Relay” will step to a tripped state.
a. If the screen’s “End Test” soft key is pressed before the simulated speed is taken up to or
above the Overspeed Trip setpoint, the module will revert back to the “Start Test” screen and
also switch the module’s input speed channel back to sensing actual rotating equipment
speed.
b. If the 12-second timer expires before the simulated speed is taken up to or above the
Overspeed Trip setpoint, the module will display a message “Test Time Expired and revert
back to the “Start Test” screen and also switch the module’s input speed channel back to
sensing actual rotating equipment speed.
c. If a Modbus interface command to “Abort Auto Simulated Speed Test” is given before the
simulated speed is increased up to or above the Overspeed Trip setpoint, the module will
revert back to the “Start Test” screen and also switch the module’s input speed channel back
to sensing actual rotating equipment speed.
7. Issue a Reset command from either the module front panel, discrete input, or the Modbus interface
to reset the module’s output Trip Relay back to its non-tripped state. The input speed channel will be
sensing actual rotating equipment speed again.
8. Users can alternatively view the “Overspeed/Acceleration Log” screen to verify sensed trip speed,
maximum speed sensed during the event, sensed acceleration at trip point, and maximum
acceleration sensed during event.
See “General Testing Notes” below for information on related messages and their meaning.
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