RE: Long out record PV Monitoring error in client using CaChannel-1.5 python interface

["Wang Xiaoqiang" <Xiaoqiang.Wang@psi.ch>]

 

What you mean by "When ever the record attends the –ive values"?

 

Are you using CaChannel 1.5 from http://sourceforge.net/projects/igor2epics/files/CaChannel/ ?

I did a test with your snippet, into which I have added the trivial missing imports. I have attached the script and database

 

My test system is:

  Scientific Linux 5.1 x86

  EPICS 3.14.8

  Python 2.4.3

 

Here is the output. Could you run my attached script and post the output?

 

### IOC Log ####

slslc06> dbpf long 1234
DBR_LONG:           1234      0x4d2
slslc06> dbpf long 2147483647
DBR_LONG:           2147483647 0x7fffffff
slslc06> dbpf long 2147483648
DBR_LONG:           2147483647 0x7fffffff
slslc06>                                  

#### Python Monitor ###

        2010-12-01 09:40:59
long    2010-12-01 09:40:59     0
long    2010-12-01 09:41:16     1234
long    2010-12-01 09:41:33     2147483647

######################

 

 

Best,

Xiaoqiang

 

---

From: Ritesh Sugandhi [mailto:ritesh.sugandhi@gmail.com]
Sent: Tuesday, November 30, 2010 4:53 PM
To: tech-talk@aps.anl.gov
Cc: pamgurd@shaw.ca; Wang Xiaoqiang; Di Maio Franck
Subject: Long out record PV Monitoring error in client using CaChannel-1.5 python interface

Dear Sir,

We are using a client application develop using CaChannel-1.5 epics python interface library. The CA server is exposing a longout record which we are interested in monitoring.  When ever the record attends the –ive values. The client shows  2**32-val instead of value. while the same code works well with ao record type .

The Code is as below:

###################################################

def eventMon(epics_args, user_args):

  global monPV, now

  print monPV, now, epics_args['pv_value']

def main():

  global stop, now

  try:

    monChan = CaChannel()

    monChan.search(monPV)

    monChan.pend_io()

    print now

  except CaChannelException, status:

    print ca.message(status)

  try:

    monChan.add_masked_array_event(ca.dbf_type_to_DBR_STS(monChan.field_type()), \

          None, ca.DBE_VALUE | ca.DBE_ALARM, eventMon)

  except CaChannelException, status:

    print ca.message(status)

  while not stop:

    now = strftime('\t%Y-%m-%d %X\t')

    ca.pend_event(0.5)

###################################################

Best Regards,

Ritesh Sugandhi 

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