RMG TME400-VM VMF Series Operating Manual page 87

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:
Start Char
Slave Address
Function
Starting Address Hi
Starting Address Lo
No. of Points Hi
No. of Points Lo
LRC
carriage return
line feed
Response:
Start Char
Slave Address
Function
Byte Count
Data Hi (Reg 2000)
Data Lo (Reg 2000)
Data Hi (Reg 2001)
Data Lo (Reg 2001)
LRC
carriage return
line feed
Send character
:
01
03
07
CF
00
02
24
cr
lf
Receive character
:
01
03
04
3F
80
00
00
39
cr
lf
Manual TME400-VMF · EN07 · December, 7
APPENDIX
2000-1
see below
see below
see below
see below
th
81
2020