Emerson 026-1726, Инструкция по установке и эксплуатации

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Set Up Network Ports Network Setup and Commissioning • 11
6 Network Setup and
Commissioning
Connecting an Energy Meter to an E2 requires the
E2 to be version 3.0 or above. Contact Retail Solu-
tions for upgrade information if the controller is a ver-
sion before 3.0.
An E2 has up to three COM ports that can be as-
signed for MODBUS communication: COM2, an
RS485 port on the E2 power interface board, and
COM4 and COM6, which are optional ports requiring
expansion cards.
COM ports can only be used for one function; in
other words, if COM2 is set up as the I/O network,
you cannot connect MODBUS devices to COM2. En-
sure your E2 is equipped with an RS485 COM Card
(P/N 637-4890)
and configured in E2 General Servic-
es (

,
Serial
tab) to enable COM4 or an
E2 Expansion COM Card
(P/N 637-4871)
to enable
COM6.
Connect the MODBUS network cable to the three-
terminal connector on the COM port you wish to as-
sign as MODBUS. Reverse polarity of +/- on RS485
cable from E2 to device.
6.1. Set Up Network Ports
Before communicating to an Energy Meter, the
port on the E2 that has the cable connected to the En-
ergy Meter must be configured to use the Energy Me-
ter.
1. Log in to the E2 with Level 4 access.
2. Press

followed by

-
General
Controller Info
.
3. Press

+

to open the
Serial
tab of the General
Controller Info setup screens:
4. This screen will have a “Connection” field for all
COM ports on the E2. Highlight the COM port con-
nection field that will be used for MODBUS, and
press
 -
LOOK UP
. From the list of network
types, select
MODBUS
(
1-3
).
5. Four fields will become visible underneath the
COM port connection field, which pertain to the
way the device communicates:
6.
Baud -
Default setting is
19.2k
. The baud rate set-
ting should be set to match the baud rate dip switch
settings of all Energy Meter devices. (All devices
connected to the same COM port should be set to
the same baud rate.)
•
Data Size -
Leave this field at the default value (
8
).
•
Parity -
Leave this field at the default value (
None
).
The parity settings should be set to match the parity
dip switch settings of all Energy Meter devices. Re-
fer to Table 2.
•
Stop Bits -
Leave this field at the default value (
1
).
7. Press

to save changes and exit.
Figure 6-1 - Location of E2 COM Ports
E2 PIB COM PORT ASSOCIATIONS
COM1
COM4
COM6
COM2
Serial Device
RS485 COM Port
(2 Connectors)
RS485 COM Card
(2 Connectors)
Serial Device
RS232 Port
POWER INTERFACE BOARD
(PIB)
E2 Modem/Expansion
COM Card Mounted
Above PIB
Plug-In
Modem
Card
COM3
E2 Enclosure (Right Side)
RS485
RS232
Figure 6-2 -
Serial Communications Manager Screen