Emerson SP4402 - PID Lower Limit; PID Scaling; PID Destination; PID Hold Integrator

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176 Unidrive SP Regen Installation Guide
www.controltechniques.com Issue Number: 2
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.
See Pr 14.13 and Pr 14.14.
14.14 PID lower limit
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
211
Range Regen ±100.00 %
Default Regen -100.00
Update rate Background
14.15 PID scaling
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
3 111
Range Regen 0.000 to 4.000
Default Regen 1.000
Update rate 4ms
14.16 PID destination
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
1 2 1111
Range Regen Pr 0.00 to Pr 21.51
Default Regen Pr 0.00
Update rate Background
14.17 PID hold integrator
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default Regen 0
Update rate 4ms
14.18 PID symmetrical limit enable
Drive mode Regen
Coding
Bit SP FI DE Txt VM DP ND RA NC NV PT US RW BU PS
111
Default Regen 0
Update rate Background