Communicating With The Module - ICP DAS USA tM-TH8 User Manual

4.1 Communicating with the module

If you attempt to communicate with the module and
receive no response, first check the following:
Ensure that the supplied power is within the range of

+10 to +30 V DC. If the supplied power is OK, then
the power LED should be on.
When the module receives a command, the power LED

is set to "off". The power LED is shown as "on" after
the module responds. This method can be used to
check whether the module has received a command
sent from the host.
If possible, use another device to check whether the

host can communicate with the device through the
same RS-485 network.
If the host is a PC installed with a Windows operating

system, then execute the DCON Utility to determine
whether the module can be found. The DCON Utility
can be downloaded from the ICP DAS website
http://www.icpdas.com. The DCON Utility
documentation can be found in the "Getting Started
For I-7000 Series Modules" manual.
Set the module to "INIT mode" and communicate with

the module using the following settings: address 00,
Baud Rate 9600bps and no checksum. See Section A.1
for details.
132 tM-TH8 User Manual, Rev: A1.1 7MH-018-A11