Chapter 2: Specifications and System Configuration
DTM temperature controller operating manual
2.4 Station Number Setting
In a DTM group, communications between the host and expansion modules is conducted via an internal
communications bus; and communications with a host computer is conducted via the DTM hosts RS485,
Ethernet, or USB. The hosts station number selection dial is therefore the RS485 station number setting,
and the station number when the DTM host is employing internal communications is 0, which indicates that
the communications protocol setting is also the setting for communications between the DTM hosts RS485
and the host computer. The station number selection dial for each expansion module is the internal station
number four the groups internal communications; the communications protocol is defined as the internal
protocol between the DTM host and its expansion modules, and users need only set the internal station
number; however, users must remember that the station number of expansion modules with the same
attributes cannot be repeated. The station numbers of expansion modules with different attributes may be
the same, and this will not affect their function. The new settings will take effect when the DTM host is
powered on again after the external switch has been reset.
Module function
selection dial
Corresponding
station number
1-F, 0=1 0
Hex
Measurement
expansion module
1~F, 0= invalid
I/O expansion
module (DO)
1~F, 0= invalid
I/O expansion
module (CT)
1~F, 0= invalid
Setting range: 0-F
Default settings: 1
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