Erhardt+Leimer OL 80 - Page 17

BEA--220265-EN-04 BPage17
CCDarraycameraOptoLineOL80..
Themeasuringrangeofeachsensormaybesetindividually.Itmay
correspondtotheentirecamerascanningrange(2048pixels)oronly
apartofit.Themeasuringrangeissetinparameters10and11.
Thefollowingrulesshouldtherebybeobserved:
- Camerapixelsareusedastheunitofmeasurement(max.2048).
Thevaluesarealwaysinreferencetothephysicalcamerascan-
ningdirection.
- Ifthevaluesinparameters10and11exceedthephysicallength
ofthecamerascanningrange(start+length>2048),themeasur-
ingrangesettingisnoteffective,i.e.theentiremeasuringrangeis
used.
- Aseparatemeasuringrangemaybesetforeachsensor.
- Ifa0issetinbothparametersforsensors2to7,themeasuring
rangeofthesesensorswillbelimitedtothatsetforsensor1.
- Themeasuringrangesettingisalsoeffectiveduringthecalibration
process.Thecameraiscalibratedtothemeasuringrangesetin
sensor1.
- Defaultsettingforsensor1:
Parameter10=0,Parameter11=2048
Thesensoroperatingmode(parameter6)determineswhetherthe
sensorshouldoutputthepositionofacontrastingedge(operating
mode1)orthecenterbetweentwocontrastingedges(operating
mode2).Oncetheoperatingmodeisset,thecontrastingedgesin
thecamerascanningrangefromwhichthepositionistobeoutput
mustbespecied(parameter7/8).
Emergencyguiding(parameter9)isintendedforwebguidingorfol-
low-upsystems.Foreachsensorthatoutputsameasuredvalueona
webguidingorfollow-upsystem,theCANaddressofanothersensor
maybespecied(parameter9),thatwilloperateinemergenciesin
theeventofthelossoftheguidingcriterion.
Example:
Web travel should be controlled according to a printed line. If the line
is missing due to a printing error, web travel is to be controlled ac-
cording to the web edge. In this case, two sensors should be cong-
ured. Sensor 1 species the line position, sensor 2 the edge position.
In parameter 9 of sensor 1 is address of sensor 2 should be speci-
ed.
 Cameras supplied separately and not as part of a system de-
signed by E+L as congured to output one measured value:
the position of the right web edge under address 0.1.
Arraycamerameasuringrange
totalmeasuringrange
02048
limitedmeasuring
range
2001848
Webplane
setmeasuringrange(mm)=
Valueofparameter22xvalueofparameter11
2048