Specifications

4P357732-1 – 2014.04 Page 51 of 58
5. Modbus Interface DIII test operation
5.1 Introduction
To test the operation of the Modbus Interface DIII setup connected to the units, a Modbus master
program on a PC can be used.
An example is “Modbus Poll” PC program.
Internet download location: http://www.modbustools.com/modbus_poll.asp
(shareware with a time
limited trial period.)
5.2 Outline of system
“Rx+/Tx+” =>“A+”
“Rx-/Tx-“ => “B-“
DS1 off/off/off/off setting = 9600bps Even 1 stop bit
DS2 off/off/off/on = Modbus address 1
USB/RS485
converter (Daikin
spare - part
reference 999417P)
“Modbus poll”
PC program
F1/F2 connected to
the units