SSD 605C - Chapter 3 PID

6-48 Programming Your Application
605C Frequency Inverter
PID
This function block allows the Inverter to
be used in applications requiring a trim to
the setpoint, depending on feedback from
an external measurement device. Typically
this will be used for process control, i.e.
pressure or flow.
MMI Menu Map
1
SETUP PARAMETERS
2
FUNCTION BLOCKS
3
SETPOINT FUNCS
4
PID
PID SETPOINT
PID FEEDBACK
PID SP NEGATE
PID FB NEGATE
PID ENABLE
PID INTEGRAL OFF
PID P GAIN
PID I TIME CONST
PID D TIME CONST
PID FILTER TC
PID OUT POS LIM
PID OUT NEG LIM
PID OUT SCALING
PID OUTPUT
PID
PID OUTPUT [320]
–
0.00 %
PID ERROR [766]
–
0.00 %
0.00 % – [310] SETPOINT
–
0.00%
–
[764] FEEDBACK
–
FALSE
–
[763] SETPOINT NEGATE
–
FALSE
–
[765] FEEDBACK NEGATE
–
FALSE
–
[311] ENABLE
–
FALSE
–
[312] INTEGRAL DEFEAT
–
1.0
–
[313] P GAIN
–
1.00 s
–
[314] I TIME CONST
–
0.000 s
–
[315] D TIME CONST
–
2.000 s
–
[316] FILTER TC
–
100.00 %
–
[317] OUTPUT POS LIMIT
–
-100.00 %
–
[318] OUTPUT NEG LIMIT
–
1.0000
–
[319] OUTPUT SCALING
–
Parameter Descriptions
SETPOINT
Range: -300.00 to 300.00 %
An input to the PID block.
FEEDBACK
Range: -300.00 to 300.00 %
An input to the PID block.
SETPOINT NEGATE
Range: FALSE / TRUE
Changes the sign of SETPOINT.
FEEDBACK NEGATE
Range: FALSE / TRUE
Changes the sign of FEEDBACK.
ENABLE
Range: FALSE / TRUE
This parameter globally resets the PID output and integral term when FALSE.
This parameter must be TRUE for the PID to operate.
INTEGRAL DEFEAT
Range: FALSE / TRUE
This parameter resets the PID integral term when TRUE.
P GAIN
Range: 0.0 to 100.0
This parameter is the true proportional gain of the PID controller. With a P gain of zero, the
PID output would be zero.
I TIME CONST
Range: 0.01 to 100.00 s
The integral time constant of the PID controller.