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Subject: mbboDirect record setup
From: Pontius Pontiac via Tech-talk <tech-talk@aps.anl.gov>
To: tech-talk@aps.anl.gov
Date: Tue, 13 Aug 2019 16:45:21 -0700

Hi,

While setting up an mbboDirect record with an Acromag XT1111 Binary I/O module, I observe the behavior that only the LSB of my 6-bit mbboDirect bit bank is being changed when the EPICS value is changed. Is modbus function "6" the appropriate one to use for the mbboDirect data type? The drvModbusAsynConfigure instruction I am using is:

drvModbusAsynConfigure("C1ISCAUX_BIO02","c1iscaux_bio02",0,6,0,4,0,1,"Acromag")

and the EPICS record itself is set up as:

grecord(mbboDirect,"C1:LSC-CM_REFL1_BITS")
{
    field(DESC,"REFL1 gain bits")
    field(DTYP,"asynUInt32Digital")
    field(OUT,"@asynMask(C1ISCAUX_BIO02 0 0x1)")
    field(NOBT,"6")
    field(OMSL,"closed_loop")
    field(DOL,"C1:LSC-CM_REFL1_SET")
    field(PINI,"YES")
}

I'm also wondering if it is possible to have mbboDirect bits that are grouped together from two separate hardware Binary I/O PLCs?

thanks,

gautam


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