JOHNSON CONTROLS
91
SECTION 4 - TECHNICAL DATA
FORM 155.31-ICOM2.EN.UL
ISSUE DATE: 12/21/2018
4
The following table contains information about the
communication specifications needed for the Modbus
RTU. See Table 18 on page 86 for more information
about the Read Command or Table 19 on page 87 for
more information about the Write Command.
TABLE 22 - COMMUNICATION SPECIFICATIONS
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
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