SSD 605C, Product Manual

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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.