4. APPENDIX
126
4.3.3
Connection between Looms and Data Collection Boards (LTB3)
To introduce the TMS scanner, it is necessary to connect looms to LTB3 boards.
Check if the looms to be monitored allow connection with the LTB3 boards.
[ 1 ] Communication Method between LTB3 Boards and Computer
The data collection board (LTB3) collects the loom parallel monitor signals such as the production
pulse, stop signal and stop cause signal. LTB3 sends the collected data to the TMS scanner PC by
serial communication (RS485).
For TMS scanner communication, the upstream and downstream cables form one loop.
Star connection using a hub as in the Ethernet is not made. In the TMS scanner, each loop is
called a channel.
Parallel monitor signal
Loom
Parallel signal
interface
LTB3
Loom
Parallel signal
interface
LTB3
Loom
Parallel signal
interface
LTB3
Serial communication (RS485)
Downstream
Upstream
TMS scanner PC
ATTENTION