TReX User Manual v2.14 Firmware
30769
11
Status(signed short x 10)
R
16
31025
11
Battery(signed short x 10)
R
16
40001
11
DAC 1 (value from 0-1023)
R/W
16
40257
11
DAC 2 (value from 0-1023)
R/W
16
40513
11
Special Function Commands
1 – Reboot Unit
2 – Request Slave I/O to be returned
to Master.
W
2
40769
125
Message Tx Buffer (variable len up to
250 bytes)
W
16
Message Tx Buffer (On Request):
The TReX is a Modbus capable paging transmitter. This means that not only can the generic
third party SCADA application control and monitor IO using standard Modbus commands, but
the SCADA application can also send paging messages using the
WT Protocol
. This allows
the SCADA application to directly message to pager, send information to devices such as LED
signs or to output serial data from any TReX unit.
In order to send a pager message, the SCADA application should send content such as
“WT1234560A10 Test Message” to Modbus address 0x300 and function code 16. The
message must conform to the documented
WT Protocol
.
© WTE Limited, 2018 – Christchurch New Zealand
Page 91 of 158
