Vermes MDS 3200A - Remote Adjust; Purpose; Advantages; Procedure

VTK‐VS‐BA‐004e‐B|UserManualMDS3200A | Communication Interfaces
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7.2.2 RemoteAdjust
7.2.2.1 Purpose
Duringaremoteadjust,asopposedtothenormalprocedure(seepage31),thesystemis
operatedfromamasterdevice(e.g.aPC),bymeansofinterfaces(PLC,RS‐232C).Thefunc‐
tionitselfisidentical.
7.2.2.2 Advantages
Theremoteadjustallowsfortotalcontrolofan
MDC3200Aintegratedinamachine,since
dispensingparameterscanbemonitoredbythesoftwareofthismachine.Thecontrolunit
canbebuiltinwithpermanentkeylock.Thusthemodificationofparameterswithoutau‐
thorizationcanbepreventedinthemachinesoftware.
7.2.2.3 Procedure
Theremoteadjusthas
tobeperformedaccordingtothefollowinginstructions:

INFORMATION!(Displayingremoteadjust)
 Inthecourseoftheentireprocedure,bothadjustLEDsarelitsimultaneously.
 Thedisplaymeanwhileshows“RemoteAdjustisrunning!”
 FortransmissionoftheordersbetweenPCandcontrolunit,bothoftheinterfaces

(RS‐232CaswellasPLC‐interface)areused.

Step1: Sendthecommand“ADJUST:START“tothecontrolunitviaRS‐232C.Thesystem
returnsthemessage“Unscrewnozzlepressenter“.
Step2: Thenozzleunitmustcompletelybedetached,sothatthetappetbecomesvisible.
Step3: Inorder
toconfirmstep2,ashorttriggersignal(500μs–80ms)mustbesentto
thecontrolunit–viaPLC‐interface.Thesystemthenreturnsthecurrent“Adjust
Value”,continuouslyrepeatingthetransmissiontothePCinintervalsof500ms
(viaRS‐232C).
ShortTriggersignal:

 5Vor24V(PIN2+PIN4orPIN3+PIN4InputsignalofMDCvia15pinSub‐D)
 Signallength:500μs–80ms
Anadditionalcommandtoupdatetheadjustvalueonthescreenisthereforenot
required.
Step4: Rotatethenozzle
unitclockwisetowardsthefluidbox,untilthevaluedisplayed
onPCisinthetolerancerange(between1020and1039).Ifdesired,youcanalso
watchthegreenLEDonthecontrolunit.
Step5: Confirmtheindicatedvalue(e.g.1035)bysendingashorttriggersignalviaPLC‐
interface,asdescribedabove.ThesystemreturnsthefollowingresponseviaRS‐
232C:
1.“AdjustLEDGreen“=Theadjusthassuccessfullybeencompletedandthe
greenLEDislit.Beyondthetolerancerange(1020‐1039)itisimpossibletocon‐
firmthevalues.
Intheseinadmissibleranges,theadjustcan
onlybeinterruptedbysendingalong
triggersignal(100ms–200ms)tothecontrolunitviaPLC‐interface.Thesystem
returnsthemessage“Adjustfailed“tothePC.
LongTriggersignal:
 5Vor24V(PIN2+PIN4orPIN3+PIN4Inputsignalof
MDCvia15pinSub‐D)
 Signallength:100ms–200ms

