Manual

18
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
6.0 troublesHooting guide
The Servo Pro is easy to congure and operate, but
if problems do occur, the following guide can assist
troubleshooting.
TherststepistoobservethePowerLEDtoverifythat
theproperelectricalpowerhasbeenconnected.Then
observetheStatusLEDandnotetheFlashCode.Ifit
isnotthenormalgreenheartbeatindication,refertothe
StatusLEDFlashCodechartinSection4.4.
6.1 troublesHooting examPle
The following example demonstrates a typical
troubleshootingprocess.
Assumethesestartingconditions:
1. Thehandwheelisengaged(pulledawayfromthe
actuator).
2. TheServoProhasneverbeencalibrated.
3. The Servo Pro has been congured to accept a
commandsignalof0-10VDC
4. Thecommandsignalfromtheprocesscontrolleris
actually4-20mADC,anditisconnectedinreverse
polarity – the positive conductor is connected to
INPUT(-)andthenegativeconductorisconnected
toINPUT(+)
ThePower LEDissolidgreenindicating the poweris
properly applied.
TheStatus LEDis ashinga single-red errorpattern.
The Status LED Flash Code in Section 4.4 indicates
thisisbecausethehandwheelisengaged,preventing
the Servo Pro from moving the actuator motor. This
error condition can be corrected by disengaging the
handwheel(pushingittowardtheactuator.)
NowtheStatusLEDisashingatwo-redFlashCode
error.Section4.4indicatesthattheServoProis not
receiving a proper command signal. This could be
causedbyvariousissues–inthiscase,Conguration
switches 1, 2 and 3 must be set toaccept the 4-20
mADCcommandsignalANDthepolarityofthewiring
must be corrected - the positive conductor must be
connected to INPUT (+) and the negative conductor
mustbeconnectedtoINPUT(-).Ifonlyonecorrection
ismade,thetwo-redFlashCodewillcontinue.BOTH
of these corrections must be made to establish the
proper command signal and clear the two-red Flash
Codeerror.
The Status LED is now ashing the two-green Flash
Code,indicatingthatthedefaultcalibrationvalueshave
beenloaded.Thiswillmovetheactuatorintheproper
general direction (increasing the command signal will
power the motor open and decreasing the command
signal will power the motor closed) but the Servo
Pro has not been exactly calibrated to this particular
actuator. This advisory can be cleared by performing
theCalibrationProcedureinSection3.1.
After the Calibration Procedure has completed
successfully, the Status LED is ashing the green
heartbeatpatternandisreadyforservice.