York YHAU-CGH, Установка, эксплуатация и обслуживание

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FORM 155.32-ICOM2.EN.UL SECTION 4 - TECHNICAL DATA
ISSUE DATE:1/10/2018
JOHNSON CONTROLS 79
Table 25 - Write Command
USER-CREATED
The diagrams and tables that follow detail some of the work that must be performed by the
customer to ensure that the communication systems work properly.
Figure 35 - Connection Detail For Sub 9 PiN
Table 26 - Scope of Delivery of Upper Communication System
Table 27 - Cable Diagram (RS-422/RS485)
ITEM ADDRESS CONTENT
1 Chiller-heater operation signal 02001 ON at CHILLER-HEATER OPERATION, PULSE SIGNAL
2 Chiller-heater stop signal 02002 ON at CHILLER-HEATER STOP, PULSE SIGNAL
3 Set point 00203 0050~1000 unit, 1 unit=0.1°F (0.1°C)
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 27 on
page 79 .
Communication program
for central monitoring
unit
X
For the details of the communication protocol, path
type, function code, communication data address,
and so on.
PIN CONNECTION
PIN. NO.
RS-422/RS-485
SIGNAL NAME DIRECTION MEANING
1 RDA Input Receive Data A (+)
2 RDB Input Receive Data B (-)
3 SDA Output Send Data A (+)
4 ERA Output Data Terminal Ready A (+)
5 SG Signal Ground
6 CSB Input Send Possible B (-)
7 SDB Output Send Data B (-)
8 CSA Input Send Possible A (+)
9 ERB Output Data Terminal Ready B (-)
Shell FG Frame Ground (Common with SG)
LD20597b
Serial Interface (COM2) Connect User Created Table
5
1
9
6
LD20598