March 2021
Installation, Operation and Maintenance Manual
MDE 254 Rev. 1
Appendix64
Appendix
The command sent by the master is Universal Command 3 – Read Dynamic Variables.
The response from the slave is a frame with the following values:
Table A-1.
Data Bytes Description Values (Hex) Values (Dec)*
0 - 3 Loop Current (mA) 40 80 00 00 4.00
4 PV Units Code 39 57 = Percent
5 - 8 PV Value 00 00 00 00 0.0
9 SV Units Code 39 57 = Percent
10 - 13 SV Value 42 A4 33 33 82.1
14 TV Units Code 39 57 = Percent
15 - 18 TV Value 00 00 00 00 0.0
19 QV Units Code 20 32 = Degrees Celsius
20 - 23 QV Value 41 B8 00 00 23.0
NOTE: *Converted using IEEE-754 (IEC 559)