User Manual
HART/EtherNet/IP Gateway
GT200-HT-EI
WWW.SSTAUTOMATION.COM
21
As the request is: “None”, the user should fill “0” for the section “Length of Sending Data (BYTE)”
The “Length of Receiving Data (BYTE)” will be 7, which is the sum of 2 status bytes and 5 device response bytes.
Command 3 (Command ID 3): Read Dynamic Variable and Primary Variable Current
Read primary variable current and four (at most) pre-defined dynamic variables. The primary variable current always
matches the AO output current of the device. A second, third and fourth variable is defined for each device type, E.g.
The second variable is the sensor temperature, etc.
Request: None
Response:
Byte
Description
Byte 0-3
Primary Variable Loop Current
（
units of milli-amperes
）
Byte 4
Primary Variable Units Code
Byte 5-8
Primary Variable
Byte 9
Secondary Variable Units Code
Byte 10-13
Secondary Variable
Byte 14
Tertiary Variable Units Code
Byte 15-18
Tertiary Variable
Byte 19
Quaternary Variable Units Code
Byte 20-23
Quaternary Variable
Please check the picture of the SST configuration software below:
