1Installation & Programming Manual
Chapter 1: Introduction & Overview
The Series 1746R PLC Resolver Interface Module is a resolver based unit that incorporates
Allen-Bradley SLC 500 I/O interface technology, and is completely compatible with theA-B
Series 1746R I/O chassis. The unit monitors machine/process position and delivers absolute
position data with up to 12 bit
(4096count) resolution per turn to the SLC500processor.
The Series 1746R PLC Resolver Interface Module is available in two versions:
1746R-1isforsingle axis applicationsandusesasingleturn resolver. Standard“Turns
Counting”softwareallowsasingleturnresolvertobeusedinmulti-turnapplications.
1746R-2isfordualaxis applications andcanusetwo,singleturn resolvers tomonitor
eachaxisindependently, orisfieldconfigurableforusewithasingle,multi-turndual
resolvertomonitorasingleaxisforabsolutepositioningovermultiplerevolutions.
The 1746R PLC Resolver Interface Module will read in the “raw position” from 1 or 2 resolvers,
convert it to a scaled position and transmit that data to theA-B SLC 500 processor I/O image
table.
Thesoftwareallowsfield programmingofMotionDetectionof aRPM valuewhichsetsabit in theI/O
imagetable.
Thesoftwarealso willmonitortwoauxiliaryinputs, thatcanbefield configuredtooperateinone oftwo
ways:
Reset-to-Preset. Thisfeatureallowsyou tocontinuouslysynchronizepositiondata to
theleadingedgeofthe product ortoautomaticallycompensateforprocessdrift.
Brakemonitoringinmetalstampingapplications. Inthisconfiguration,automatic
calculationofstoptimeand stop angle istransferredtotheI/Oimagetable. In addition,
twoprogrammabletimelimitsare availabletomonitormaximumstopvalues: thefirstas
apotentialmaintenancewarning,andthesecond as an error if thepressexceedsthe
programmedmaximumacceptablestoptime. These status bitsaresetatthetimethe
limitsareexceeded,notafterthepressstops.
NOTE: Abrakefailfeature isalsointheBrakeMonitor configuration. Astatusbitinthe imagetable
willbesetif the resolver moves by more than +/- 20 degrees (outof360degrees)aftera
stophasbeendetermined.
Systemparametersareprogrammedthrough theI/Oimagetable. Theseparametersincludethe
positionscalingdata,themotiondetectRPM,brakemonitordataandreset-to-presetdata.
SystemdataisreadfromtheI/OImagetable. ThisdataincludesthescaledpositionandRPMofeach
resolver,thestate of theinputsanderrorflagsin the system.
Chapter 1: Introduction & Overview
Spec Tech Industrial Electric
Spec Tech Industrial Electric
