Changing Send And Receive Data Length Units To (Word/Bytes Units (Word/(Word/Bytess Units Setting) - Mitsubishi MELSEC L Series User Manual
Communication module
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5 CHANGING SEND AND RECEIVE DATA LENGTH UNITS TO BYTE UNITS (WORD/BYTES UNITS SETTING)
5 CHANGING SEND AND RECEIVE DATA LENGTH UNITS TO BYTE UNITS
(WORD/BYTES UNITS SETTING)
The word units are used for the data length (count) of the amount of data sent/received
using the following data communication functions in data communication between the
Q series C24 and the external device.
This chapter explains how to change the units (word to byte, byte to word) of the data
length (count) sent/received with the following data communication functions.
The data length units can be set for each Q series C24 interface. The Q series C24
controls the number of data to be transmitted to the external unit and the number of
data when it requests the programmable controller CPU to read the data received from
the external device according to the units set by the user.
(1) Data communication functions and buffer memory related to data
Data communications function
MC protocol
On-demand function
Data transmit function
Non procedure
protocol
Data receive function
Data transmit function
Bidirectional
protocol
Data receive function
(2) How to change the units of the data length (count)
5 - 1
length units
The following lists the data communications functions and buffer memory related
to the data length units.
(The buffer memory addresses in the table are the default value.)
Name of buffer memory related to
data length units (Address CH1, CH2)
On-demand data length designation area
Send data count storage area
Received data count designation area
Receive data count storage area
Send data count storage area
Receive data count storage area
The units of the data length (count) can be changed using one of the following
procedures.
1) Changing via GX Configurator-SC
The units can be changed on the GX Configurator-SC's system setting
screen.
2) Changing via the programmable controller CPU
The units can be changed with the CSET instruction.
Change the units of the data length (count) according to the explanation in
Section 17.4 of this manual.
Reference manual
MELSEC-Q/L MELSEC
(A1
, 141
)
Communication Protocol
H
H
Reference Manual
(400
, 800
)
H
H
User's manual (Basic)
(A4
, 144
)
H
H
(600
, A00
)
H
H
(400
, 800
)
H
H
User's manual (Basic)
(600
, A00
)
H
H
5
5 - 1
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