8.7 RESPONSE TEST
A system response test should now be carried out to ensure that the HPL110A correctly
stops the motor in the event of an alarm. To do this, run the system under normal
conditions - no alarm should occur - and then depress the MODE key to select Max.
Alarm [%] mode.
While in Max. Alarm [%] mode, use the
D, Ñ
keys to adjust the alarm limit to a value
which is lower than normal running.
Use the MODE key to return to Power = kW [%] mode and wait. The Reaction Timer
LED should illuminate and, once the reaction time has expired, a Max. Limit alarm
should be triggered.
When the Max. Limit alarm triggers, the motor should stop.
8.8 DIP SWITCH FUNCTIONS
Program Lock:
Once the HPL110A has been programmed, accidental changes may
be prevented by turning the PROGRAM LOCK function on. To do this, switch DIP
Switch 1 to the “ON” position, see section 6.2 for access.
When Program Lock is "ON", all setting values may be viewed but not changed.
The Reset button, however, remains functional.
Power-Down Alarm Block:
If using the HPL110A with an active L2 Min. Alarm, then
it is advised to use the S2-GND inhibit function described in Section 5.1 to prevent false
Min. Alarms when the motor is switched off.
If this is impractical, then the Power-Down Alarm Block function will prevent a min
alarm from being declared if measured power falls below 5% of full load within the
Tr2 trip delay value.
To select Power-Down Block function, set DIP Switch 2 to the “ON” position.
8.9 CONVERTING %KW TO ENGINEERING UNITS.
If it is necessary to set alarm limits in units of HP or kW or Torque, please refer to your
supplier or directly to WEN Technology for assistance. All set-up information on the
Set-Up Log Sheet - see back cover - will be required with the Max. and Min. Limit
values required given in the desired units.
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