Re: Keithley 2400 communication

[Rod Nussbaumer <bomr@triumf.ca>]

Priya:

If you are using streamDevice, and I recommend that you do, you can put 
all of the output string commands into a single streamDevice protocol. 
The "READ?" command appears to be a query that will invoke a response 
from the device. In that case, you can also use an 'in' command to 
acquire the reply, and format it into the respective record:

RESET {
   out "*RST";
   out "SOUR:FUNC VOLT";
   out "SOUR:VOLT:MODE FIX";
   out "SOUR:VOLT:RANG 20";
   out "SOUR:VOLT:LEV 10";
   out "OUTP ON";
   out "READ?";
   in "%f";
}

I think you would probably not want to reset the device each time you 
read from it, so splitting the READ query into a separate protocol 
attached to a separate record (ai, presumably) probably makes more sense.

Definitely see the streamDevice online docs for all of the details.

Rod Nussbaumer
Control System Group, TRIUMF
Vancouver, Canada



On 09/11/2014 06:48 AM, Mooney, Tim M. wrote:
> Hi Priya,
>
> A quick way to do this would be to attach an asyn record to the serial
> port, and use a sseq record to control and send strings to it.
>
> record(sseq, "doReset") {
> field(STR1, "Read")
> field(LNK1, "asynrecord.TMOD")
>
> field(STR2, "*RST")
> field(LNK2, "asynrecord.AOUT CA")
> field(WAIT2, "Wait")
>
> field(STR3, ":SOUR:FUNC VOLT")
> field(LNK3, "asynrecord.AOUT CA")
> field(WAIT3, "Wait")
> ...
> field(STR7, ":OUTP ON")
> field(LNK7, "asynrecord.AOUT CA")
> field(WAIT7, "Wait")
>
> field(STR8, "Write/Read")
> field(LNK8, "asynrecord.TMOD")
>
> field(STR9, ":READ?")
> field(LNK9, "asynrecord.AOUT CA")
> field(WAIT9, "Wait")
> }
>
> Tim Mooney (mooney@aps.anl.gov) (630)252-5417
> Software Services Group (www.aps.anl.gov)
> Advanced Photon Source, Argonne National Lab
>
> ------------------------------------------------------------------------
> *From:* tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on
> behalf of priya tiwari [tiwaripriya013@gmail.com]
> *Sent:* Thursday, September 11, 2014 2:19 AM
> *To:* tech-talk@aps.anl.gov
> *Subject:* Keithley 2400 communication
>
> Hello,
> I am trying communication with KEITHLEY 2400 on serial port(RS-232).I
> sent command "*IDN?" it has performed very well and i got the output.
> i want to reset the device and the commands are
> *RST
> :SOUR:FUNC VOLT
> :SOUR:VOLT:MODE FIX
> :SOUR:VOLT:RANG 20
> :SOUR:VOLT:LEV 10
> :OUTP ON
> :READ?
> now,How to write program in VDCT for performing all commands
> sequentially.Actually i have no idea about this.please help me....
>
> Q.2: How to send commands to device at run time in VDCT?
> what is the format of
> caput? on that time
>
>
> Thanks in advance