Vermes MDS 3200A - System Operation Guide; Triggering a Dispense Sequence

VTK‐VS‐BA‐004e‐B|UserManualMDS3200A | Operation
33
6 OPERATION
6.1 TriggeringaDispenseSequence
Therearethreedifferentoptionstotriggeradispensesequence:
 bytouchpanelontheMDC3200Acontroller
pressthe[trig]button,adispensingsequencewithpre‐setparameterswillbetrig‐
gered
 byRS‐232C
usethecommand“VALVE:OPEN“
 byPLCcommand
realtimetriggeringbydirect
I/O
6.2 DispensingandPositioningofaMultitudeofDots
Tocombineamultitudeofdotstoapredefinedstructure(e.g.alineoracircle),useoneof
thefollowingfourmodes:
 BurstMode
AsingletriggerimpulsebyPLCsignalcausesapredefinednumberofdispensecycles.
‐NumberofPulses:predefinedvalue(e.g.1‐32000)


Single‐ShotMode
EverydispensepointistriggeredbyanindividualPLCsignal.Whendispensingacontinuous
feature(suchasastraightlineoracircle),thefrequencyofthedispensetriggersignal
shouldbeproportionaltothetrajectoryspeedoftheaxissystem.Thisisnecessaryto
achievea
continuouslinewidth.
‐NumberofPulses:“1”

 InfiniteMode
ContinuousdispensingaslongasthePLCtriggerinputis“logic1”.Dispensingwill
stopwhenthesignalischangedto“logic0”
‐NumberofPulses:“infinite”(whenprogrammedthroughtouchpanel)
“0”(whenprogrammedthroughRS‐232C)


ExternalMo de
The“ExternalMode”willshifttheresponsibilityoftimecontroloftheparameter
“OpenTime”tothehigherlevelmachinecontrol.(Thismayrequireaveryprecise
timecontrolofthehigherlevelPLC.)Asaresult,thevalvewouldfunctionlikea
“Time‐Pressure‐Valve”.
‐Numberof
Pulses:shouldbesetto“1”
‐OpenTime:“external”
Whenthetriggersignalissetto“logic1”,thevalvewillopen.Itwillremainopen
aslongasthetriggersignalremainson“logic1”.Itwillstarttoclosewhenthe
triggersignalisswitchedto“logic0”.
ParameterslikeRising,FallingandNeedle
LiftwillbeexecutedassavedintheMDCmemory(presetvalues).
Afterthevalvehascompletelyclosedthecontrollerisreadytoreceivethenext
triggersignaltostarttheprocessagain.

INFORMATION!(opentimeandneedlelift)
Themaximumvalueforthe
“OpenTime”islimitedto15ms,ifthe“NeedleLift”isset
tomorethan80%.Thelengthofthe“OpenTime”dependsonthePLC‐signal(log‐
ic1).

