Experimental Physics and
Industrial Control System

Andy Foster <[email protected]> · Tue, 1 Aug 1995 15:55:49 +0100 (BST)

According to the SNL documentation, channel disconnects
and reconnects during execution of a state program are 
handled by the sequencer.

I am having problems with the following scenario:
I am using state code (running in a source IOC) to 
monitor the output of a record in a target IOC. In 
each state, I have the statement: 

  when( pvConnectCount() < pvChannelCount() )
  {
    printf("Connection Lost\n");
  } state init

The init state is:

  state init
  {
    when( pvConnectCount() == pvChannelCount() )
    {
      printf("All Channels connected\n");
    } state watch_car
    when( delay(5.0) )
    {
      printf("Waiting...\n");
    } state init
  }

The problem occurs when either:

(a) The source IOC comes up before the target IOC
or
(b) The target IOC gets rebooted.

Basically, the number of channel connections remains
the same as it was when the source IOC came up. There does
not seem to be any updating of the connections when the
target IOC comes up.
Is this a known problem or am I missing something?

I was expecting the source IOC to change from "Waiting..." to 
"All channels connected..." when the target came up.

By the way, I have used the -c compiler option.
Any hints?

==========================================================================
Andy Foster
Royal Greenwich Observatory		Tel:    44 (0)1223 374899 (direct)
Madingley Road				E-mail: [email protected]
Cambridge
CB3 0HA
UK

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System