Table 17: Write command
Item Address Content
1 Chiller operation signal 02001 ON at CHILLER OPERATION, PULSE SIGNAL
2 Chiller stop signal 02002 ON at CHILLER STOP, PULSE SIGNAL
3 Steam condensate control valve 00201 0000~1000 unit, 1 unit=0.1%
4 Set point 00203 0050~1000 unit, 1 unit=0.1°F
User-Created
The following diagrams and tables detail some of the work that must be performed by the
customer to ensure that the communication systems work correctly.
Table 18: Scope of delivery of upper communication system
Item Customer JCI Remarks
Control panel with upper
communication function
X Communication protocol: Modbus RTU
Wiring work for Modbus RTU
communication
X
Apply RS485 communication cable.
(See the following for more information.)
Communication program for
central monitoring unit
X
See Table 20 for the details of communication protocol, path
type, function code, communication data address, and so on.
YHAU-C Single Effect Steam-Fired Absorption Chiller92
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