RE: SetVoltage problem

[info22@online.de]

Thanks for the answer. And how can I extend this example to increase every 30 seconds or every 60 seconds? 

Best regards.   

Subject:	RE: SetVoltage problem
From:	"Arnold, Ned D." <nda@aps.anl.gov>
To:	"info22@online.de" <info22@online.de>, EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date:	Thu, 10 Sep 2015 12:41:34 +0000

Hi -

The AUTOSAVE module in synapps provides the "bumpless reboot" to restore the records to what they were before the reboot.

If your requirements exceed what you can do in the EPICS database, try the sequencer. 

  Ned

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From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of info22@online.de [info22@online.de]
Sent: Thursday, September 10, 2015 02:35 AM
To: EPICS Tech-Talk
Subject: SetVoltage problem 

Hello,

the first record waits for user value. The second reads the value back. The seconde increase or decrease it and hold the value.

User Value: 10 V
‎Calc: 0, 1, 2, .... 10

My Problem:  Let's say the current value (hardware device) is 8 V. If I I restart the IOC and put a new value like 10V i want to continiou ti increase 8, 9, 10V. But The after restarting the IOC my first Calc-Value is 0. 

Current Value: 8V
‎SetVolt: 10V
Calc: 0, 1, 2, 3, 4 ... 10. 

Is there other possibility? And my second problem is I want to make a seq-record to increase after 30, 60 and 90 seconds.

For example (epics and css): 
User Volt Selection: 1000V, 1500V and 2000V 
User Slew Rate Option: 5V, 10V, 15V / per Time
‎Time: 30 seconds, 60 seconds, 90 seconds

record(ao, "SetVolt") {
field(EGU, “V”)
field(LOPR, “0”)
field(HOPR, “28”)
field(DRVH, “28”)
field(DRVL, “0”)
field(VAL, “0”)
}

record(ai, "SetVoltReadback"){
field(DTYP, “stream”)
field(INP, "@xyz.proto read($(xyz)) $(device)")
field(SCAN, “1 second”)
field(FLNK, "VoltCalc PP")
}

record(calcout, "VoltCalc") {
field(DESC, “Write Voltag Out”)
field(SCAN, “1 second”)
field(CALC, "A:= ((C<(A-B)) ? (A-B) : ((A+B)>C ? C : (A+B)));A")

field(INPA, "VoltCalc.VAL")
field(INPB, “SlewRate”) /* standard:1 */
field(INPC, "SetVolt")

field(OUT, "WriteOut.VAL PP")
field(OOPT, “On Change”)
field(DOPT, “Use CALC”)
}