GE Industrial Solutions POWER LEADER PMCS Network Architecture Guide - Manual (Page 51)

Power Management Control System
Chapter 3 – Network Wiring and Construction
41
3–3 Modbus – Ethernet Integration
Ethernet comes into play only as an alternative platform
for the host PC. It is most often used when an existing
Ethernet network is in place or being installed for data-
networking purposes, or when Ethernet-only devices such
as the EPM 7700 are to be used with PMCS.
To communicate with the Modbus networks (and any
commnet segments beneath them), a host PC based on
Ethernet requires an Ethernet Gateway. Rather than use
an RS-485 interface card, connect the Modbus networks to
the RS-485 ports on the Ethernet Gateway, which is
connected to the Host PC via Ethernet, over which it
communicates data from the Modbus networks.
The Ethernet Gateway offers a more nearly plug-and-play
format, with fewer wiring complexities and rules than the
Modbus Concentrator. See GEH-6505, Ethernet Gateway User
Guide
, for detailed information on installing and
configuring the Ethernet Gateway.
3–4 Local Configuration of IEDs
You must properly configure each IED connected to the
PMCS. Be sure to set the IED address at the IED and at the
host software, set the communication speed, and configure
any necessary settings.
For detailed directions on setting addresses,
communication speed, and protection parameters, refer to
the user guide for each IED.
3–5 Applying Power to the System
WARNING:
Voltages hazardous to personnel and equipment may be
present at the power connections.
Once you’ve installed the PMCS network, you should apply
power to the network from the bottom up. Follow this
procedure when applying power to the system for the first
time:
1. Make sure that all communications wiring has been
correctly connected to each IED and that the system
matches the plan exactly, meeting all rules and
requirements explained in this manual.
2. Make sure that all wiring for control power to IEDs
has been correctly installed and that the correct
control voltage is present at each IED.
3. If commnet IEDs are installed, apply control power
to the IEDs and then to the Modbus Concentrator to
which they are attached.
4. Apply control power to any Modbus RTU IEDs.
5. Apply control power to the Ethernet Gateway, if one
is being used.
6. Turn the computer on and start the PMCS software
according to the instructions in the software
manuals.
3–6 Software Loading and Startup
Refer to the Power Management Control System software
installation procedures in GEH-6514, Read This Book First.