Menu 14
Commander SK Advanced User Guide
169
Issue Number: 9 www.controltechniques.com
If Pr
14.18
= OFF(0), the high 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
= On, the high 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 PID output is scaled by this parameter before being added to the main reference. After the addition to the main reference, the output is
automatically scaled again to match the range of the destination parameter.
The destination parameter should be set up with the parameter that the PID controller is to control. Only parameters which are not protected can be
controlled by the PID function. If a non valid parameter is programmed the output is not routed anywhere. If the PID is to control speed then it is
suggested that one of the preset speed parameters is entered here.
When this parameter is set to 0 the integrator operates normally. Setting this parameter to On(1) will cause the integrator value to be held as long as
the PID is enabled when the drive is disabled. Setting this parameter does not prevent the integrator from being reset to zero if the PID controller is
disabled.
See Pr
and Pr
14.14
on page 151 and page 152 respectively.
This parameter monitors the main reference input of the PID controller.
14.14
PID low limit
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
1
Range
±100.0 %
Default
-100.0
Update rate
21 ms
14.15
PID scaling
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
3
1
1
1
1
Range
0.000 to 4.000
Default
1.000
Update rate
21 ms
14.16
PID output destination
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
2
1
1
1
1
Range
Pr
0.00
to Pr
21.51
Default
Pr
0.00
Update rate
Read on drive reset
14.17
PID hold integrator
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
Range
OFF(0) or On(1)
Default
OFF(0)
Update rate
21 ms
14.18
Select symmetrical limit on PID
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
Range
OFF(0) or On(1)
Default
OFF(0)
Update rate
21 ms
14.19
PID main reference
Coding
Bit
SP
FI
DE Txt VM DP ND RA NC NV
PT
US RW BU PS
1
1
1
1
Range
±100.0%
Update rate
21 ms
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