TReX User Manual v2.14 Firmware
SCADA Communication Between MASTER and SLAVE
All communication between the MASTER and SLAVE units can be viewed on the RX and TX
screens.
These messages are of little application to the user, and documented here purely for clarity of
function and debugging if required.
These messages are a variation of the
WTE Output Control Protocol.
There are however
special codes used reserved for internal use only.
Messages from MASTER to SLAVE:
Code
Description
U1
DAC 1 Control Value
U2
DAC 2 Control Value
U3
Digital Output Bitmap
U4
Special Slave Commands
Messages from SLAVE to MASTER:
Code
Description
U1
DAC 1 Control Value
U2
DAC 2 Control Value
U3
Digital Output Bitmap
U4
Digital Input Bitmap
U5
ADC 1 Value
U6
ADC 2 Value
U7
Temperature * 10
U8
Battery V * 10
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