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E² Controller
would indicate the signal for the Return Humidity sensor is not
present. That sensor is either not enabled or it has failed.
BMS Communication
When BMS communication is utilized, the controller must be
equipped with an optional expansion card designed for one of
a variety of serial communication protocols available (see
"BMS Interface," p.
28). A communication port on the
expansion card allows the controller to be field connected to a
central Building Management System (BMS) for monitoring
and control of data points.
A RS-485 serial port is available for Modbus or BACnet MS/TP
protocols and a 10BaseT port is available for TCP/ IP based
protocols such as BACnet over IP, BACnet over Ethernet,
SNMP or HTTP.
Supported Protocols
BACnet over IP
BACnet over Ethernet
HTTP
SNMP V1, V2c
Modbus over IP
BACnet MS/TP
twisted pair
Modbus RTU
twisted pair
Direct Connection
BMS
Unit 1
Unit 2
Unit 3
If multiple A/C units are grouped together, each controller
added to the group must be configured with a CPU address for
BMS communication.
For complete details on utilizing BMS control, contact vendor
Product Support (see
"Product Support," p.
Direct BMS Control
The controller may be configured to accept proportional analog
signals that mimics a sensor. The controller will act on that
signal whether it comes from a real sensor or a BMS analog
output.
Refer to
"BMS Parameters, Version 1.2," p. 59
controllers BMS parameters.
58
Media
Connection
10BaseT
RJ45 direct
10BaseT
RJ45 direct
10BaseT
RJ45 direct
10BaseT
RJ45 direct
10BaseT
RJ45 direct
daisy chain
daisy chain
Daisy Chain Connection
BMS
Unit 1
Unit 2
Unit 3
69).
for the E²
BMS Communication
SERVICE
Alarms
BMS Comm
Run Hours
The Service>BMS Comm menu is used to set up the
parameters to allow a BMS (BAS) interface for monitoring
controller operation for the serial-based networks such as
BACnet MS/TP. Units using the BACnet over IP, BACnet over
Ethernet, or HTTP protocols do not need to change anything
in this menu loop.
BMS Communications
Address:
Baud Rate:
Protocol:
BMS keep alive:
The BMS address and baud rate have meaning only on RS-
485 networks and with the serial protocols of Modem, Modbus
RTU, Commission, and Carel. The baud rate is fixed for
BACnet. Systems utilizing a 10BaseT interface should use the
defaults of address 1, baud rate 19200, and protocol BACnet.
Certain Integer and Digital variables that start with BMS (see
page 4-35) require that the BMS keep alive parameter changes
between 1 and 2 within a 10 minute span. The general
procedure is to set up variables like the BMS low fan speed and
then write a 1 to the BMS keep alive address.
Troubleshooting the Control I/O
Module Signal LEDs
The E² control I/O module includes 3 signal LEDs (red, yellow
and green) that provide information on the operation of the
control module and status of the connection to the pLAN.
These signal LEDs are positioned adjacent to the yellow,
Power On LED (see
Figure 17, p.
used for diagnostic purposes if a problem arises with the
controller.
1
19200
BACnet
1
28). The signal LEDs may be
AH-SVX015A-EN
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Table of Contents
Troubleshooting
