Experimental Physics and
Industrial Control System

Dirk Zimoch <[email protected]> · Fri, 28 Nov 2014 09:56:25 +0100

Hello Liang,

I would not use a calcout record. Use an ao record and scale the value

using .ASLO. So the VAL field of the ao record can hols user coordinates

(mm) abd the value sent to the device will be VAL/ASLO. Sthus you need

to set ASLO to 0.05 (1/20).

Dirk

On 27.11.2014 15:52, 梁雅翔 wrote:

Hi,
     Sorry to bother you, I have some trouble which pullze me some time, could you please give me some advice.
     I am trying to control a step motor.
     Now I want to set a number(60) to pv(um distance), send the number*20(60*20=1200) to device. I think CALC would be useful. I could not understand CALC well though I have RRM 3-14.
     The following code is what I do.

Thanks!

*******devKohzuAries.db

record(longin,"RPS")  # send to device
{
     field(DESC, "move relativly")
     field(DTYP, "stream")
     field(INP,  "@devKohzuAries.proto RPS $(PORT) $(A)")
     field(FLNK,"um distance")
}
record(calcout,"um distance")
{
     field(DTYP,"stream")
     field(OUT,"@devKohzuAries.proto RPS $(PORT) $(A)")
     field(CALC,"A*20")
     field(INPA,"um distance.VAL")
}

********  devKohzuAries.proto
RPS{
     out "\x02RPS1/5/%d/0";
}

Liang YX

Institute of High Energy Physics
Chinese Academy of Sciences
P. O. Box 918, 100049 Beijing
R. P. China

Tel: 0086-0188235977-603
Email: [email protected]

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System