Configuring Dcom; Introduction - ABB COM600 series User Manual

3.6.
3.6.1.
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COM600 series, Version 4.1
External OPC Server User's Manual
Property/Para- Value or Value range/ Default
meter /Example
Neutral Max Limit 20000
Neutral Min Limit 0
Phase Hi Limit 0
Phase HiHi Limit 0
Phase Lo Limit 0
Phase LoLo Limit 0
Phase Max Limit 20000
Phase Min Limit 0
Res Hi Limit 0
Res HiHi Limit 0
Res Lo Limit 0
Res LoLo Limit 0
Res Max Limit 20000
Res Min Limit 0

Configuring DCOM

Introduction

DCOM is a Microsoft technology that allows COM (OPC) servers and clients to commu-
nicate with each other while running on separate computers. DCOM must be enabled
by making the proper DCOM configuration for the OPC server, OPC client and general
DCOM settings on both computers.
There are several ways to configure DCOM depending on the needs of the applications,
users and network administration structure. The following sections provide instructions
on DCOM configuration when the COM600 computer and OPC server computer are
part of different Windows domains, or are not part of any domain. This kind of config-
uration provides relatively good security by not allowing more users than necessary to
access the OPC server.
DCOM is configured using a shared user account on both computers for authentication
between the OPC client running on COM600 computer and the OPC server running on
the OPC server computer. Authorization for the user account must be configured on both
computers. On the COM600 computer, the shared user account must be granted remote
access rights so that OPC callbacks from the remote OPC server work. On the OPC
server computer, the shared user account must be granted rights to launch, activate and
access the OPC server. Additionally, similar access rights are needed for the OpcEnum
Description
Max limit for neutral
Min limit for neutral
Hi limit for phase
HiHi limit for phase
Lo limit for phase
LoLo limit for phase
Max limit for phase
Min limit for phase
Hi limit for res
HiHi limit for res
Lo limit for res
LoLo limit for res
Max limit for res
Min limit for res
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