making the calc record process in CS studio

["Saunders, Wyatt via Tech-talk" <tech-talk at aps.anl.gov>]

Subject: making the calc record process in CS studio

From : ws275820 at ohio.edu

To: tech-talk at aps.anl.gov

Hi, I am a student working at Edwards Accelerator lab. I am trying to use the calc record. I am using the EPICS IOC (7.0) and I am interfacing with it using CS-Studio to control an Agilent technologies 34980A.

Goal: read a pressure from a vacuum gauge. The pressure is read as a voltage then I want to use the calc record to convert it to a pressure in torr. 

My current code looks like this for two separate vacuum gauges "CG1" and "CG2"

#Vacume gauge measurement records using DMM card

#reads voltage output from the BRAX vacume guage controller for CG1 from port 02

record(ai, "$(P)$(R)readCG1"){

  field(DESC, "convection guage one on the turbo molecular pump")

  field(SCAN, "Passive")

  field(DTYP, "stream")

  field(INP, "@devKS_34980A_EPICS.proto getVoltageDCAuto(1001) $(PORT) $(A)")

  field(PINI, "YES")

  field(EGU, "Volts")

}

#reads voltage output from the BRAX vacume guage controller for CG1 from port 03

record(ai, "$(P)$(R)readCG2"){

  field(DESC, "convection guage two on the roughing pump")

  field(SCAN, "Passive")

  field(DTYP, "stream")

  field(INP, "@devKS_34980A_EPICS.proto getVoltageDCAuto(1002) $(PORT) $(A)")

  field(PINI, "YES")

  field(EGU, "Volts")

}

#converts the voltage from CG1 to a preshure in toor 

#this record hase not been tested i asume it will run when called and it will then call the read record to atain a value to procese 

record(calc, "$(P)$(R)VacumelevelCG1") {

  field(DESC, "vacume level on convection guage one on the turbo molecular pump")

  field(CALC, "10^(a-5)")

  field(INPA, "$(P)$(R)readCG1")

  field(PINI, "YES")

  field(SCAN, "Passive")

  field(EGU, "Torr")

}

#converts the voltage from CG2 to a preshure in toor 

#this record hase not been tested i asume it will run when called and it will then call the read record to atain a value to procese

record(calc, "$(P)$(R)VacumelevelCG2") {

  field(DESC, "vacume level on convection guage two roughing pump")

  field(CALC, "10^(a-5)")

  field(INPA, "$(P)$(R)readCG2")

  field(PINI, "YES")

  field(SCAN, "Passive")

  field(EGU, "Torr")

}

The best way I have found to make a record process is to set an action button to execute a command in the action's menu the command i use is. caput "record name" 1 

This works well for my ai records as it returns the value just like I want it to, and I can see the commands being sent to the Agilent box. However, when I try this same thing with the calc record it will not process the record. I do not see commands sent to the Agilent box.

Assumption: When the calc record is called it will make all other records that it takes as inputs process, in order to do its calculation.

Question 1: is my assumption correct about the calc record?

Question 2: is there a better way to make a record process using an action button?

Thanks,

Wyatt