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M-7065 User’s Manual
Ver2.0, Dec. /200
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Using Modbus ASCII Protocol, characters are used to start and
end a frame. The Leading Character ':' is used to flag the start of a
command and each command is ended with a CR•LF combination.
The LRC characters are appended to the command preceding the
CR•LF characters.
LRC Calculation:
All characters except for Leading Character (:) and delimiter
(CR•LF) are added with a carry being discarded. Total value is
converted to binary notation, is converted to 2’s complements, then
to hexadecimal figures, that is, LRC.
Example :
Modbus RTU => 01 46 00 [ 12 60 ]
Modbus ASCII => :014600B9(CR•LF)
(1.) hexadecimal = 01h+46h+00h = 47h
(2.) 2’s complement: = B9h (LRC)
Technical Support
If you have problems about using the M-7065 DIO module,
please contact ICP DAS Product Support.
Email:
Содержание M-7065
Страница 7: ...M 7065 User s Manual Ver2 0 Dec 2008 7 1 2 Pin Assignment...
Страница 42: ...M 7065 User s Manual Ver2 0 Dec 2008 42 Related Commands Section 2 2...
Страница 106: ...M 7065 User s Manual Ver2 0 Dec 2008 106 Supported modules M 7065 Valid starting channel DI Count Value 0x0000 0x0003...