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<== Date ==> <== Thread ==>
Subject: asynError in write on Power PMAC IOC
From: Chanaka via Tech-talk <[email protected]>
To: [email protected]
Date: Mon, 31 Dec 2018 11:03:40 -0500
Dear All,

I am running into a hanging issue while performing scans using higher level software due to a WRITE INVALID caused by lower-level EPICS PVs. The occurrence is intermittent. From what I can find on line this *could* be due to how SCAN filed is setup in this database for the relevant PVs. I am not entirely sure if that could be the case. Any help would be appreciated.

--The specific error I see in the IOC shell is the following. This is for one of the PVs.

2018/12/28 17:46:07.974527 SSH1 XF:07BMA-OP{MC:03}TrajInitPlc-Read: asynError in write: 10.7.130.93 write error

--And camonitor returned the following.

XF:07BMA-OP{MC:03}TrajInitPlc-Read 2018-12-28 17:46:07.974595 0 WRITE INVALID

--The PV is defined as follows.

record(ai, "$(P){$(DEV)}TrajInitPlc-Read")
{
    field(DTYP, "stream")
    field(INP,     "@ppmac_stream.proto getVarInt(Plc[15].Running) $(SSH)")
    field(SCAN, "0.5 second")
}

-- getVarInt is defined as follows

getVarInt{
    out "\$1";
    in "\n\$1=%d";
}

-- Port configuration is as follows

drvAsynPowerPMACPortConfigure("SSH1", "10.7.130.93", "root", "deltatau", "0", "0", "0")

Thank you,

Chanaka De Silva
NSLSII
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