JOHNSON CONTROLS
87
SECTION 4 - TECHNICAL DATA
FORM 155.30-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
4
The following table contains information about the communication specifications required by the Modbus/RTU.
Communication protocol Modbus/RTU
Communication path type RS422/RS485 Data Length: 8 Bit Stop Bit: 1 Bit Parity: EVEN Speed:
9600 bps
Connector D-Sub 9pin
Function Code Read Coil Status: 01 Read Holding Register: 03
Device Digital Signal: Coil Analog Signal: Holding Register
Slave Equipment Address 1
TABLE 22 - COMMUNICATION SPECIFICATION - MODBUS/RTU
For more information about the Read Command, see Table 19 on page 84. For more information about the Write
Command, see Table 20 on page 84.
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