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Lab #3a State Notation Language

Lab #3a State Notation Language. Lab #3 State Notation Language.

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Lab #3a State Notation Language

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  1. Lab #3a State Notation Language

  2. Lab #3State Notation Language • Real Life Example #3 : It is apparent from previous studies that the cathode temperature requires stabilization. Although this has been accomplished via closed-loop control from the workstation, a better permanent solution is to implement the closed loop control on the ioc using the sequencer. • Create a sequence program that : • Monitors the state studnt_:OP:stabilizerC • When studnt_:OP:stabilizerC changes from 0 to 1, use the current reading of studnt_:cathodeTempM as the setpoint and maintain that setpoint by varying studnt_:cathodeCurrentC. Proportional Control Algorithm : CTL[T+1] = CTL[T] + (GAIN * (SETPOINT - MEASURED)) • Stop the algorithm when studnt_:OP:stabilizerC goes to 0. • Print messages to studnt_:OP:stabilizerMsg to inform the operator of sequence status. • Test your results using the StripTool.

  3. SNL Development and Test • A skeleton program has been provided for you in ~/ioc/linac/linacApp/src/stabilizer.st . After editing this file, type gnumake to compile it. • Edit the startup file to remove the # in front of the following lines : #ld < stabilizer.o #seq &stabilizer, "user=studnt_" • The first time the sequence program runs, you will get the following error : 0xnnnnn (stabilizer): 3 of 4 assigned channels have connected • Use seqShow, seqShow <taskId>, and seqChanShow <taskId> to debug this problem

  4. SNL Development and Test • To load a new version of the state program, use the following commands from the ioc console (instead of rebooting) : • seqShow • td <stabilizer_task_id> • ld < stabilizer.o • seq &stabilizer, "user=studnt_" • Additional helps for the vxWorks shell • Esc k/Esc j - cycles through previous commands • vi commands can be used to edit command line • i - insert; x - delete char • l - move cursor right; h - move cursor left • r - replace single character; R - replace characters

  5. Lab #3bDevelopment Environment

  6. Development Environment • Create a new development area as follows : • Execute the commands cd ~/ioc mkdir example cd example <path>/makeBaseApp.pl -t example example <path>/makeBaseApp.pl -i -t example example where <path> = /usr/local/epics/baseR3.13.1.1/bin/solaris

  7. Development Environment • The first command creates: <top>/ Makefile config/ ... exampleApp src/ ... Db/ ... • The second command creates: <top>/iocBoot Makefile iocexample/ …

  8. Development Environment • Each command can be issued multiple times to create additional iocxxx or xxxApp directories • Examine the following … • example/config/RELEASE • exampleApp/src/baseLIBOBJS • exampleApp/src/base.dbd • exampleApp/src/exampleInclude.dbd • exampleApp/src/Makefile.Host • exampleApp/src/Makefile.Vx • exampleApp/Db/dbExample* • exampleApp/Db/ Makefile.Host

  9. Development Environment • Boot your ioc from this area and familiarize yourself with the example databases and sequence program . • example/iocBoot/iocexample/st.cmd

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