Experimental Physics and
Industrial Control System

Rod Nussbaumer <[email protected]> · Thu, 11 Sep 2014 07:28:11 -0700

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 ([email protected]) (630)252-5417
Software Services Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab

------------------------------------------------------------------------
*From:* [email protected] [[email protected]] on
behalf of priya tiwari [[email protected]]
*Sent:* Thursday, September 11, 2014 2:19 AM
*To:* [email protected]
*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

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System