Re: [foxboro] Control of Switchgear

Considering your application and the design of the GDEV block, I would
attempt to use it in the following ways:

1. From Sequence Block; - AUTO with AUTDSR input unconnected.
2. From Operator Control Room; - MANUAL with MANDSR as the input
   from Display
3. From Plant Floor; use DISABLE input permanently connected from
   field local switch.

Additional Notes:
There are 2 additional inputs; they are HOLD(HLDDSR) and interlock(INTDSR).
The HOLD input is used to drive the equipment to a safe state and it has
priority over AUTDSR. The safe state is determined by
HLDDSR(0-open,1-close,2-leave-as-is).
When the sequence stops running it should drive the GDEV to Manual (MANSW)
prior to INACTIVATing itself.
The INTDSR input is used interlocking this device with other devices.
The INTDSR input overrides MANDSR, AUTDSR, (HOLD)HLDDSR.
The DISABLE input overrides al other inputs (MANDSR, AUTDSR, HLDDSR,INTDSR)
There are 2 additional user parameters USERL1 and USERL2 which can be used
to assist in providing additional functionality. These parameters are yours
to use any which way you like.
Does this help?
If this does not provide all the functionality required, then you will need
assistance from CALC/SEQ block as you are probably already doing.
Leo Moramarco
Instructor,Lifetime Learning Center
Invensys Systems Canada, Foxboro Division
Phone: 514-421-8301
E-Mail: Lmoramar@xxxxxxxxxx
 

-----Original Message-----
From: Pollard, Simon [mailto:Simon.Pollard@xxxxxxxxxxxxxxxx] 
Sent: Thursday, March 18, 2004 11:03 AM
To: 'foxboro@xxxxxxxxxxxxx'
Subject: [foxboro] Control of Switchgear

Hello everyone.
 

We currently have an issue on site with the control of our HV breakers.

 

The existing configuration uses a GDEV and CALC block combination for
operating the switches, but this has limitations. In particular, we need the
breakers to be controlled from...

 

a)                   a sequence

b)                   an Operator (from the Control Room when the breaker is
selected to "Remote")

c)                   an Operator (from the switch itself when it is selected
to "Local")

 

Just now the GDEV is held in manual, which results in a State Alarm every
time we switch locally - not ideal.

 

My main question is how do you guys control switchgear? How do you manage to
switch from any of the 3 locations mentioned above?

 

Simon Pollard

Control & Instrumentation Engineer

OMAT (Organisation, Maintenance et Assistance Technique)

Saint-Gobain Glass UK ltd.

Weeland Road,

Eggborough,

East Yorkshire

DN14 0FD

 

Tel:    +44 (0)1977 666139

Mob:  +44 (0)7766 776789

Fax:   +44 (0)1977 666210

email: simon.pollard@xxxxxxxxxxxxxxxx

 



The information transmitted including any attachments is intended 
only for the exclusive use of the person(s) or entity to which it is 
addressed and may contain confidential and privileged material that 
may be subject to legal privilege.  Any perusal, review, 
retransmission, dissemination, distribution, reproduction or other 
use of, or taking of any action in reliance upon, this information by
persons or entities other than the intended recipient without the 
sender's prior consent is unauthorised and strictly prohibited.  If 
you have received this message in error, please notify the sender 
immediately and delete the message from your computer without making any
copies. Any personal views and opinions expressed in this email message are
the sender's own and do not necessarily represent the views and opinions of
the Company. 
In accordance with the Telecommunications (Lawful Business
Regulations) (Interception of Communications) Regulations 2000
the Company reserves the right and, may at any time, monitor and
intercept (but not record) e-mails to establish if they are relevant to
its business.
This footnote also confirms that this message has been swept for the
presence of computer viruses but this does not guarantee that it is virus
free.



 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave
 
 
 
_______________________________________________________________________
This mailing list is neither sponsored nor endorsed by Invensys Process
Systems (formerly The Foxboro Company). Use the info you obtain here at
your own risks. Read http://www.thecassandraproject.org/disclaimer.html
 
foxboro mailing list:             http://www.freelists.org/list/foxboro
to subscribe:         mailto:foxboro-request@xxxxxxxxxxxxx?subject=join
to unsubscribe:      mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave

Other related posts: