Re: [foxboro] Global Variable Connections
- From: "Grace, Kathy" <kathy.grace@xxxxxxxxxxxxxxxx>
- To: <foxboro@xxxxxxxxxxxxx>
- Date: Wed, 28 May 2008 09:51:51 -0400
Sean,
Even though this may work, I do not recommend it and it is not supported
behavior. ALMCNT, ALMSTATE, and other variables are created by the
hiinit process at boot for the Alarm Manager. They are considered
workstation global variables (know and available to the workstation
processes). Connections to these variables are not supported. No other
process should be altering these variables nor should they be deleting
and recreating them. This could cause unexpected problems with the AM.
Kathy
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Redmond, Sean S
Sent: Tuesday, May 27, 2008 7:35 PM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Global Variable Connections
Excellent,
That seems to work. Thanks for that. =3D20
Sean
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx]
On Behalf Of Johnson, Alex P (IPS)
Sent: Wednesday, 28 May 2008 10:41 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Global Variable Connections
This came up not so long ago with another client. It seems that the DM
variables are created with a special version of obj_create() that does
not announce the creation of the variable.
Since the (re)creation is not announced, the CP's OM can't reconnect to
it.
The work around was - are you ready for this? - on reboot:
1) Delete ALMCNTK0AW02 using omdel
2) Create ALMCNTK0AW02 using omcrt
This will cause the variable to be announced to the system.
I've never personally done this, but I've been told that it is working
at another site. I'd suggest trying it on a test system first.
If you happen to have AOS on your system, you might be able to do this
without the delete/create by using aosReconnect. I've never tried it
with a Shared Variable, but it ought to work.
/opt/aos/exe/aosReconnect ALMCNTK0AW02
should do it.
Hope this helps.
Regards,
=3D3D
Alex Johnson
Invensys Process Systems
10900 Equity Drive
Houston, TX 77041
713 329 8472 (voice)
713 329 1600 (switchboard)
713 329 1944 (fax)
alex.johnson@xxxxxxxxxxxxxxxx
http://ips.invensys.com =3D3D
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