Programming Your Application
1-87
690+ Series Frequency Inverter
RAISE/LOWER
This function block acts as an internal
motorised potentiometer (MOP).
The OUTPUT is preserved during the
power-down of the Inverter.
Functional Description
The table below describes how OUTPUT is controlled by the RAISE INPUT, LOWER INPUT
and RESET inputs.
RESET
RAISE
INPUT
LOWER
INPUT
Action
TRUE Any Any
OUTPUT
tracks RESET VALUE
FALSE TRUE FALSE
OUTPUT
ramps up to MAX VALUE at RAMP TIME
FALSE FALSE TRUE
OUTPUT
ramps down to MIN VALUE at RAMP TIME
FALSE FALSE FALSE
OUTPUT
not changed. *
FALSE TRUE TRUE
OUTPUT
not changed. *
* If OUTPUT is greater than MAX VALUE the OUTPUT will ramp down to MAX VALUE at
RAMP TIME. If OUTPUT is less than MIN VALUE the OUTPUT will ramp up to MIN
VALUE at RAMP TIME.
IMPORTANT:
If MAX VALUE is less than or equal to MIN VALUE, then OUTPUT is set to MAX VALUE.
Raise/Lower
OUTPUT [325]
–
0.00 %
FALSE
–
[327] RAISE INPUT
–
FALSE
–
[328] LOWER INPUT
–
10.0 s
–
[326] RAMP TIME
–
100.00 %
–
[330] MAX VALUE
–
-100.00 %
–
[329] MIN VALUE
–
0.00 %
–
[331] RESET VALUE
–
FALSE
–
[332] RESET
–
MMI Menu Map
1
SETUP
2
SETPOINT FUNCS
3
RAISE/LOWER
RAISE
INPUT
LOWER
INPUT
RAMP
TIME
MAX
VALUE
MIN
VALUE
RESET
VALUE
RESET
OUTPUT
Parameter Descriptions
RAISE INPUT
Range: FALSE / TRUE
When TRUE causes OUTPUT to ramp up.
LOWER INPUT
Range: FALSE / TRUE
When TRUE causes OUTPUT to ramp down.
RAMP TIME
Range: 0.0 to 600.0 s
Rate of change of the OUTPUT . Defined as time to change from 0.00% to 100.00% . Note that
the raise and lower rates are always the same.
MAX VALUE
Range: -300.00 to 300.00 %
The maximum value to which OUTPUT will ramp up to.
MIN VALUE
Range: -300.00 to 300.00 %
The minimum value to which OUTPUT will ramp down to.
RESET VALUE
Range: -300.00 to 300.00 %
The value the OUTPUT is set to when RESET is TRUE.
RESET
Range: FALSE / TRUE
When TRUE, forces OUTPUT to track RESET VALUE .
OUTPUT
Range: —.xx %
The ramped output. This parameter is persistent, that is, it is saved throughout a power failure.
