CODEL TunnelTech 100 Series, Техническое руководство

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Technical Manual
Page 6
CODEL
Issue : A Rev. : Date : 29/06/2015 Ref. : 100190
3.3. RS485 Interface
Power
- USB powered.
PC Communications
- USB port.
The serial USB RS485 interface is used as a temporary connection with the TunnelTech 101 during
commissioning and for diagnostic communications.
The operation function and operation of the interface are contained in Appendix A: Communication & RS485
Connection.
3.4. Modbus Protocol
Use the TunnelTech program to
,
Edit the 7F3C file:
The numbers and locations are in hexadecimal -
Location 7F3C = 00 Codel
= 01 MODBUS
- Location 7F1F =
Change only the above 2 bytes, then save and send the file to the TunnelTech AQM.
Note that the AQM will still communicate on address 255 with the TunnelTech software. This is to allow
communications if an AQM address and protocol is unknown.
Our Modbus can handle the following functions:
0x03: Read Holding Register
0x06: Pre-set Single Register
0x10: Pre-set Multiple Registers
(
See Appendix A for more information)
the address the AQM is to use
as MODBUS slave (01 =
address 1, 02 = address 2, 0A
= address 10 etc, range 01 to
FE.)