Pid Low Limit/Pid Scaling/Pid Output Destination; Pid Hold Integrator; Select Symmetrical Limit On Pid; Pid Main Reference - Emerson 2202 Advanced User's Manual

Parameter Parameter
Introduction
x.00 description format
14.14 PID low limit
Bit SP
Coding
Range ±100.0 %
Default -100.0
Update rate 21 ms
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.
14.15 PID scaling
Bit SP
Coding
Range 0.000 to 4.000
Default 1.000
Update rate 21 ms
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.
14.16 PID output destination
Bit SP
Coding
Range Pr 0.00 to Pr 21.51
Default Pr 0.00
Update rate Read on drive reset
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.
14.17

PID hold integrator

Bit SP
Coding
1
Range OFF(0) or On(1)
Default OFF(0)
Update rate 21 ms
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.
14.18

Select symmetrical limit on PID

Bit SP
Coding
1
Range OFF(0) or On(1)
Default OFF(0)
Update rate 21 ms
See Pr 14.13 and Pr 14.14 on page 151 and page 152 respectively.
14.19

PID main reference

Bit SP
Coding
Range ±100.0%
Update rate 21 ms
This parameter monitors the main reference input of the PID controller.
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