RMG TME400-VM, Operating Manual

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APPENDIX
Manual TME400-VMF · EN07 · December, 7
th
2020
81
81
The TME400 recognizes the following Modbus commands:
(03 Hex) Read Holding Registers
(06 Hex) Preset Single Register
(10 Hex) Preset Multiple Regs
(08 Hex) Subfunction 00 Hex: Return Query data
TME400 Exception Codes
01 Illegal Function
02 Illegal Data Address (register not available)
03 Illegal Data Value (register not writable or incorrect value)
Example (Modbus query/response):
Query: Send character
Start Char :
Slave Address 01
Function 03
Starting Address Hi 07
Starting Address Lo CF 2000-1
No. of Points Hi 00
No. of Points Lo 02
LRC 24
carriage return cr
line feed lf
Response: Receive character
Start Char :
Slave Address 01
Function 03
Byte Count 04
Data Hi (Reg 2000) 3F see below
Data Lo (Reg 2000) 80 see below
Data Hi (Reg 2001) 00 see below
Data Lo (Reg 2001) 00 see below
LRC 39
carriage return cr
line feed lf