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CHAPTER 4: PROGRAMMING
4.8.6
Thermistor Simulation
239 MOTOR PROTECTION RELAY – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
When switch inputs simulation is turned off the following flash message will be
displayed for 3 seconds.
SIMULATION
HAS BEEN DISABLED
•
EMERGENCY RESTART INPUT: Enter the status of this switch input as
. The functionality of this input remains as is with actual input connected.
CLOSED
•
EXTERNAL RESET INPUT: Enter the status of this switch input as
functionality of this input remains as is with actual input connected.
•
OPTION 1 INPUT: Enter the status of this switch input as
functionality of this input remains as is with actual input connected.
•
OPTION 2 INPUT: Enter the status of this switch input as
functionality of this input remains as is with actual input connected.
•
SIMULATION ENABLED FOR: Select the desired length of time that simulation will be
enabled. When the programmed time has elapsed, switch inputs simulation will turn
off. If
UNLIMITED
is selected, simulated switch input status will be used until
simulation is turned off via the
until control power is removed from the 239.
•
SIMULATION: Enter
to switch from actual thermistor input to the programmed
ON
simulation thermistor resistance value. While simulation is on the actual thermistor
input will be overridden by the simulated resistance value. Set this setpoint to
after simulation is complete. As a safeguard, simulation will automatically turn off if:
•power to the 239 is turned off and on
•the time programmed in
S5: TESTING\THERMISTOR SIMULATION\SIMULATION ENABLED FOR
has elapsed since simulation was first enabled
When thermistor simulation is turned on the following flash message will be displayed
for 3 seconds.
SIMULATION
HAS BEEN ENABLED
When thermistor simulation is turned off the following flash message will be displayed
for 3 seconds.
THERMISTOR SIMULATION
HAS BEEN DISABLED
•
THERMISTOR RESISTANCE: Enter the value of the thermistor resistance to be
simulated. The functionality of the thermistor remains as is with an actual input
connected to the 239.
•
SIMULATION ENABLED FOR: Select the desired length of time that simulation will be
enabled. When the programmed time has elapsed, thermistor simulation will turn off.
If
UNLIMITED
is selected, simulated thermistor input will be used until simulation is
OPEN
OPEN
SIMULATION ON/OFF
setpoint or via the serial port or
OPEN
or
or
. The
OPEN
CLOSED
or
. The
CLOSED
or
. The
CLOSED
OFF
setpoint
4–55
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