User Manual
3-channel HART/Modbus TCP Gateway
GT200-3HT-MT
WWW.SSTCOMM.COM
43
06H command " universal
mode enable" bit is 1
10H command will write the data
to a continuous region which
address begins from “Universal
mode send data”
The length of the data written to
"The universal send data length"
address with 06H command
06H command to change "the
Universal send data label”
The gateway stores the received HART frame in a continuous region whose starting address is "the Universal
receiving data" and writes the length of the received data in the "Universal receiving data length". Then change
the value of “universal receiving label". If any data is not received within the response waiting time, "universal
receiving error counter" will plus 1. Before sending the universal frame, all users should read the universal
receiving label and the error counter. After finishing the universal frame, it needs to read these two values
continuously until one of them changes.
5.3 Trigger Command
Users can trigger any HART command which is configured by gateway through Modbus TCP. The specific
approach is: appointing Modbus register address to “trigger command ID” of one channel; using No.6 command
of Modbus to write the user trigger command number (when using SST-HE-CFG to configure commands, the
software will automatically calculate and display) to the "trigger command number". Then rewriting "the trigger
label" can trigger the value to change and trigger the gateway to finish a trigger operation. Parts of response data
in the device will be stored to "the receiving data memory" which specified by this command number.