Emerson XEV22D Specifications download pdf (Page 25)

E2 Setup of Devices ECT MODBUS Networking to E2s • 19

17 ECT MODBUS

Networking to

E2s

Connecting an XEV22D controller to an E2 re-

quires the E2 to be version 2.84 or above. Contact Re-

tail Solutions for upgrade information if the controller

is a version before 2.84.

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. COM4 is recommended for MOD-

BUS connection of Emerson units.

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 the device.

17.1.E2 Setup of Devices

17.1.1.Set Up Network Ports

Before setting up device, the port on the E2 that

has the MODBUS cable connected must be set up as

a MODBUS port.

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 the device, and

press

 - LOOK UP. From the list of network

types, select MODBUS.

Figure 17-1 - 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 17-2 - MODBUS Networking

Figure 17-3 - Serial Communications Manager Screen

XEV22D

#1 #3

TERMINATED,

BIASED

(ALL 3 JUMPERS

IN UP POSITION)

XEV22D

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Emerson XEV22D Specifications Page 25

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