SSD 605C - Chapter 4 RAISE;LOWER

6-52 Programming Your Application
605C Frequency Inverter
RAISE/LOWER
This function block acts an internal
motorised potentiometer (MOP).
The OUTPUT is preserved during the
power-down of the Inverter.
F
unctional 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 RATE
FALSE FALSE TRUE OUTPUT ramps down to MIN VALUE at RAMP RATE
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 RATE. If OUTPUT is less than MIN VALUE the OUTPUT will ramp up to MIN
VALUE at RAMP RATE.
IMPORTANT: Do not set MIN VALUE to greater than MAX VALUE, as the resulting value of OUTPUT will
be unpredictable.
MMI Menu Map
1
SETUP PARAMETERS
2
FUNCTION BLOCKS
3
SETPOINT FUNCS
4
RAISE/LOWER
RAISE INPUT
LOWER INPUT
RL RAMP RATE
RL MAX VALUE
RL MIN VALUE
RL RESET VALUE
RL RESET
RAISE/LOWER OUT
RAISE/LOWER
OUTPUT [325]
–
0.00 %
FALSE
–
[327] RAISE INPUT
–
FALSE
–
[328] LOWER INPUT
–
10.0 s
–
[326] RAMP RATE
–
100.00 %
–
[330] MAX VALUE
–
-100.00 %
–
[329] MIN VALUE
–
0.00 %
–
[331] RESET VALUE
–
FALSE
–
[332] RESET
–
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 RATE
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: xxx.xx %
The ramped output. This parameter is persistent, that is, it is saved throughout a power failure.