Menu 14
Parameter
structure
Keypad and
display
Parameter
x.00
Parameter
description format
Advanced parameter
descriptions
Macros
Serial comms
protocol
Electronic
nameplate
Performance RFC mode
250 Unidrive SP Advanced User Guide
www.controltechniques.com Issue Number: 10
If Pr 14.18 = 0, the upper limit (Pr 14.13) defines the maximum positive output for the PID controller and the lower limit (Pr 14.14) defines the
minimum positive or maximum negative output. If Pr 14.18 = 1, the upper limit defines the maximum positive or negative magnitude for the PID
controller output. When any of the limits are active the integrator is held.
The value written to the destination parameter is (PID controller output x scaling) + PID main reference.
When this parameter is set to 0 the integrator operates normally. Setting this parameter to 1 will cause the integrator value to be held. Setting this
parameter does not prevent the integrator from being reset to zero if the PID controller is disabled.
14.13 PID upper limit
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
2 111
Range
Open-loop, Closed-loop vector, Servo,
Regen
0.00 to 100.00 %
Default
Open-loop, Closed-loop vector, Servo,
Regen
100.00
Update rate Background read
14.14 PID lower limit
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
211
Range
Open-loop, Closed-loop vector, Servo,
Regen
±100.00 %
Default
Open-loop, Closed-loop vector, Servo,
Regen
-100.00
Update rate Background read
14.15 PID scaling
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range
Open-loop, Closed-loop vector, Servo,
Regen
0.000 to 4.000
Default
Open-loop, Closed-loop vector, Servo,
Regen
1.000
Update rate 4ms read
14.16 PID destination
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 2 1111
Range
Open-loop, Closed-loop vector, Servo,
Regen
Pr 0.00 to Pr 21.51
Default
Open-loop, Closed-loop vector, Servo,
Regen
Pr 0.00
Update rate Read on reset
14.17 PID hold integrator
Drive modes Open-loop, Closed-loop vector, Servo, Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default
Open-loop, Closed-loop vector, Servo,
Regen
0
Update rate 4ms read
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