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Date: 10/18/01 at 12:54 PM
Posted by: Dieter Montanez
E-mail: jose.d.montanez@us.westinghouse.com

In Reply to: Operate IT to link to PI posted by Roger Jones on 10/11/01 at 5:40 AM:

Hi Roger,

I haven't used Operate IT yet but i did implement a similar link using the following components:

Software:

1) ABB OPC server for AF100 V.2.0, We did also use
V.1.2 but this one does only support the old
ISA CI526 V1 communications board required to
connect physically to the AF100 Bus. The V.2.0
does also support the PCI board CI527 that
will also connect directly to the BUS media
without the need of an extra media converter
TC512.

2) OSISOFT PI Data archive running on a separate
server and also serving other PI Data log
clients.

3) OSISOFT PI Datalog server and API running
OPCINT on the same machine used for ABB OPC
software and AF100 Hardware.

We implemented a total of 4000 tags beeing 2000
AO and the rest DO/DI and some 20 DI's. The update rate for the AO was around 600ms and very satisfactory for our recording purposes. With small amounts of AO (20 or so) we did also manage to get updates in the 200 ms area. For our 4000 tags 1000ms was the standard.

Just reading from the bus is straight forward writing is a bit tricky and required some work on tuning the Extended DB and Datasets on the AC110 controller we have been using.

Finally our whole system worked fine:

- PI interface (read only) 100 % recommended
- Advasoft NT 2.0 over OPC also recommended
- Writiing constantly into the AF100 (from other
PLC over OPC) also recommended.

Regarding the hardware sizing. The total memory requierements for all services and processes in the OPC/PI Data collection node was around 60 MB.
The OPC server from ABB alone used 40 MB of memory. We run the system on a P-IV 600 MHz single processor under NT 4 (English) SP 6. We used a hardware Raid 1 mirroring arrangement and a Ethernet 100BaseT network connection.

After all I would say the trickiest was to make the AF100 BUS receive data over the OPC, the rest was a piece of Cake.

The application was a control room HMI for a Hydro Power Plant with 6 Generators and auxiliares.

regards

Dieter

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  Operate IT Fernando J. Accini   Posted at: 05/10/02 (0)

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