JOHNSON CONTROLS
84
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
SECTION 4 - TECHNICAL DATA
TABLE 19 - 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 Hot water control valve upper limit 00201 0000~1000 unit, 1 unit=0.1%
4 Set point 00203 0050~1000 unit, 1 unit=0.1°F
User-Created
The diagrams and tables that follow detail some of the
work that must be performed by the customer to be
sure that the communication systems work properly.
TABLE 20 - 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 Table 22 on page 87 for more information.)
Communication program for central
monitoring unit
X See Table 22 on page 87 for the details of
communication protocol, path type, function code,
communication data address, and so on.
LD20597
Serial Interface (COM2)
Connect User-Created Cable
FIGURE 37 - CONNECTION DETAIL FOR D-SUB 9 PIN
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