York YHAU-CW - User-Created; FIGURE 30 - Connection Detail for D-Sub 9 Pin; TABLE 19 - Communication Data;Write Command; TABLE 20 - Scope of Delivery of Upper Communication System

JOHNSON CONTROLS
87
SECTION 4 - TECHNICAL DATA
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
4
TABLE 19 - COMMUNICATION DATA/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 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.
Serial Interface (COM2)
Connect User-Created Cable
LD20597a
FIGURE 30 - CONNECTION DETAIL FOR D-SUB 9PIN
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 21
on page 88 .
Communication program for central
monitoring unit
X See Table 22 on page 91 for the details of the
communication protocol, path type, function code,
communication data address, and other applicable
communication information not dened here.