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<== Date ==> <== Thread ==>
Subject: PINI field not working with modbus
From: "Marco A. Barra Montevechi Filho via Tech-talk" <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date: Tue, 26 Jul 2022 12:45:42 +0000
Hello all.

I have an analog in record for reading a modbus register from a device. The record is defined as follows:

record(ai, "${BL}:${H}:${EQ}:TargetVoltRead"){  
    field(DESC, "Voltage set on target [V].")
    field(DTYP, "asynInt32")
    field(EGU, "V")
    field(ASLO, 0.01)
    field(INP, "@asyn(NEG_EMODBUS_1_1_Rd_VTarget,0,1000)MODBUS_DATA")
    field(SCAN, "1 second")
}

Which reads fine. However, if i set the PINI field to YES and the scan to passive:

record(ai, "${BL}:${H}:${EQ}:TargetVoltRead"){  
    field(DESC, "Voltage set on target [V].")
    field(DTYP, "asynInt32")
    field(EGU, "V")
    field(ASLO, 0.01)
    field(INP, "@asyn(NEG_EMODBUS_1_1_Rd_VTarget,0,1000)MODBUS_DATA")
    field(SCAN, "Passive")
    field(PINI, "YES")
}


i get only 0 as value when cagetting the PV. Am i doing something wrong?

Thanks in advance.

Marco

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Replies:
Re: PINI field not working with modbus Mark Rivers via Tech-talk
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