Scope of delivery
Johnson Controls scope of delivery for the upper communication system covers the control
panels for the upper communication function. The customer is responsible to deliver all other
related equipment: concentrator (HUB), installation, wiring, communication program for the
central monitoring unit, and other applicable communication cables. See
for more information.
Table 16: Scope of delivery
Item
Customer
JCI
Remarks
Control panel with upper
communication function
X
Communication protocol: Modbus TCP
Data concentrator (HUB)
X
Installation and wiring are included
Wiring work for Ethernet
connection
X
Apply twisted pair cable
Communication program
for central monitoring
unit
X
See Table 18 and Table 19 for the details of the
IP address, function code, communication data
address, and other relevant communication
information.
Connection port for Ethernet communication
Make sure that the Ethernet cable is plugged into the correct port on the control panel. The
Ethernet connection port is located at the bottom left on the back of the control panel.
Table 17: Ethernet interface specification
Item
Specification
Communication format
10 Base-T/100 Base-TX
Connector shape
RJ-45 type modular jack connector
Blink
Data sending/receiving
Active
(green)
No light
No data sending/receiving
Blink
Data sending/receiving through 10BASE-T/100BASE-TX
LED function
Link
(green)
No light
No connection or successor job failure
Communication specification
Table 18: Communication specifications
Communication protocol
Modbus TCP
Communication path type
10 Base-T/100 Base-TX
IP address
(No. 1) 192.168.1.1, (No.2) 192.168.1.2, (No. 3) 192.168.1.3
Subnet mask
255.255.255.0
Read command
(Digital signal) 01/read coil
(Analog signal) 03/read holding register
Function code
Write command
(Digital signal) 05/force single coil
77
Model YHAU-CGN/H-CXR(M)Double Effect Direct Fired Small Absorption Chiller-Heater
