User guide

70 PID MODE (PIDMODESELECT)
This parameter activates the PID function, and selects whether the PID control will be direct or reverse
acting. Refer to Section 19.0 - MICRO Series PID SET POINT CONTROL. The following options are
available:
 OFF  DisablesthePIDfunctiontoallow“standard”driveoperation.
 NORMAL EnablesthePIDfunctionfordirectactingsystems.Anincreaseinthefeedbackvariable
will cause a decrease in motor speed.
 REVERSE Enables the PID function for reverse acting systems. An increase in the feedback
variable will cause an increase in motor speed.
NOTE:TheREVERSEselectionisnotusedtocompensateforreverseactingfeedbackdevices.Ifareverse
actingfeedbackdeviceisused,programParameters75and76-FB@MINandFB@MAXasdescribed
in Section 19.1 - FEEDBACK DEVICES.
When PID is enabled, and the drive is in REMOTE and AUTO mode, the drive will operate in a CLOSED
LOOPfashion,respondingtothefeedbacksignalinordertomaintaintheprocesssetpoint.Inthiscase,
thesetpointreferencecanbea0-10VDCor4-20mAsignal,orthekeypad.TheSPEEDREFERENCE
SOURCEindicationintheCONTROLdisplaywillindicateVDC(0-10VDC),IDC(4-20mA),orAKB
(keypad),dependingonthesetpointreference.
When PID is enabled, and the drive is in LOCAL and AUTO mode, the drive will also operate in a
CLOSEDLOOPfashion.However,inthiscase,theonlysetpointreferenceavailableisthekeypad,and
the SPEED REFERENCE SOURCE indication in the CONTROL display will indicate AKB.
When PID is enabled, and the drive is in MANUAL and LOCAL or REMOTE mode, the drive will
operateinanOPENLOOPfashion,respondingdirectlytospeedcommandsfromthekeypadonly.The
SPEED REFERENCE SOURCE indication in the CONTROL display will indicate MKB.
When PID is disabled, the drive will operate in an OPEN LOOP mode, responding directly to speed
commandsfromeitherthekeypad(MANUALmode)orananaloginputsignalorpresetspeed(AUTO
mode).
74 PID FB  (PIDFEEDBACKSOURCE)
 Thisparameterselectstheterminaltobeusedforthefeedbacksignal,andcanbesettoTB-5AorTB-5B.
TB-5A is used for 0-10 VDC signals, and TB-5B is used for 4-20 mA signals.
NOTE: The MICRO Series has only one analog input of each type, so the same type of signal cannot be
usedforfeedbackandsetpointreference.Forexample,a4-20mAsignalfromatransducercouldnotbe
usedasafeedbacksignalifthesetpointisbeingcontrolledbya4-20mAsignalfromaPLC.
75 FB @ MIN (MINIMUMFEEDBACKVALUE)
This parameter should be set to the value of the process variable that corresponds to the minimum
transducerfeedbacksignal(0VDCor4mA).
76 FB @ MAX (MAXIMUMFEEDBACKVALUE)
 This parameter should be set to the value of the process variable that corresponds to the maximum
transducerfeedbacksignal(10VDCor20mA).
74