RE: the command formats in RS232

["Geng, Xiaosong" <geng@bnl.gov>]

In the SNS vacumm controls, we use stringout records for MKS937A and Varian Dual Controller.

 

  field(OUT, "@$(PORT) <$$(ADDR)RLY$(CH)=%s>")
  %s=d.dE-dd

 

Xiaosong Geng

SNS Controls Group, BNL

Upton, NY 11973

-----Original Message-----
From: Porter, Rodney R. [mailto:rporter@anl.gov]
Sent: Thursday, July 10, 2003 10:46 AM
To: Lifang Zheng
Cc: EPICS tech-talk
Subject: RE: the command formats in RS232

I had a similar problem with exponential inputs and read the value into a drvAsciii stringin record linked to a soft analog input record.  For the output problem (all of the devices we have tried so far just ignore extra zeros) you could use a soft analog output record linked to an sCalcout Record (String Calcout Record) or a genSub Record to format the string, linked to a drvAscii stringOut Record. 

 

Rodney Porter

Scientific Associate - Data Acquisition

Intense Pulsed Neutron Source Division

Argonne National Laboratory

-----Original Message-----
From: Lifang Zheng [mailto:zhenglf@ssrc.ac.cn]
Sent: Thursday, July 10, 2003 3:04 AM
To: EPICS tech-talk
Subject: the command formats in RS232

 

Hi everyone,

 

We are developing 100MeV LINAC vacuum control system through RS232 serial. The hardware has a VIPC616 carrier and an IP-Octal-232. The software includes drvSerial,drvAscii,drvIpac,drvVipc616, tyGSOctal and devAscii. The first test was successfully with the help of Allan Honey and Steven Hartman a few month ago.

 

But we have one problem. Some of the commands use the format d.ddde-dd, but the OUT field of AO have to be specified as %e instead of %9.3e or %.3e. So the value of AO will be sent as d.ddd000e-dd which doesn't meet our requirement.

Does somebody meet the same problem? Is there any solution?

 

Any suggestion is welcome,

 

Lifang