18 function library – Lenze 8400 User Manual
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Lenze · 8400 protec HighLine · Reference manual · DMS 3.0 EN · 03/2013 · TD05
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18
Function library
18.1
Function blocks | L_PCTRL_1
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Outputs
nAct_a
INT
Speed or actual sensor value (actual process value)
• Scaling: 16384 ≡ 100 %
• Internal limitation to ± 199.99 %
bInAct
BOOL
Deactivate process controller temporarily (stop)
• Changes can be done online.
Note: This input is not interconnected in the LA_NCtrl application block.
TRUE
• The current output value is frozen.
• The internal control algorithm is stopped.
• However, a setpoint selected via input nNSet_a is still provided in
operating modes 0/1/4/5.
bIOff
BOOL
Switch off the I-component of the process controller
• Changes can be done online.
TRUE The I component of the process controller is set to zero.
nInfluence_a
INT
Limitation of the influencing factor in percent
• nInfluence_a serves to limit the influencing factor of the PID controller contained
in the FB to a required value (- 199.99 % ... + 199.99 %).
• Scaling: 16384 ≡ 100 %
• Internal limitation to ± 199.99 %
bEnableInfluenceRamp
BOOL
Activate ramp for influencing factor
TRUE Influencing factor of the PID controller is ramped up to the
nInfluence_a value.
FALSE Influencing factor of the PID controller is ramped down to "0".
bISet
BOOL
Accept I component nISet_a in PID controller
TRUE The value at the input nISet_a is accepted in the PID controller.
nISet_a
INT
Selection of I component of PID controller
• With a TRUE signal at bISet, the assigned value is accepted in the PID controller.
• Scaling: 16384 ≡ 100 %
• Internal limitation to ± 199.99 %
bPIDOff
BOOL
(from version 06.00.00)
Reset the entire PID controller
TRUE
• The I component of the controller is set to zero.
• The controller output is set to zero.
• The internal control algorithm is stopped.
Identifier
Data type
Value/meaning
nOut_a
INT
Output signal
• Internal limitation to ±32767 (±199.99 %)
• Scaling: 16384 ≡ 100 %
bSetEqAct
INT
Status output "Setpoint and actual value are identical"
TRUE Setpoint and actual value are identical, i.e. no system deviation
available.
nPIDOut1_a
INT
PID controller output without influencing factor nInfluence_a
• Inputs bEnableInfluenceRamp and nInfluence_a do not have any effect here, the
limited PID output value influenced by the internal ramp times is output.
• There is no connection with the additive input nNSet_a.
• Scaling: 16384 ≡ 100 %
Identifier
Data type
Information/possible settings