Mitsubishi MELSEC LJ71C24, User Manual

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9 DATA COMMUNICATION USING THE PREDEFINED PROTOCOL
Item Description
Byte Swap
Disable (lower upper)/
Enable (upper lower)
When sending: When "Enable" is selected, sends data swapping
the upper byte and lower byte by word (2 bytes).
When "Unit of Stored Data" is "Lower Byte +
Upper Byte" and "Data Length" is an odd number
of bytes, sends the upper byte at transmission of
the last byte.
When "Unit of Stored Data" is "Lower Bytes Only"
and "Data Length" is an odd number of bytes,
sends data without any byte swap at transmission
of the last byte.
When receiving: When 'Enable' is selected, receives data
swapping the upper byte and lower byte by word
(2 bytes).
When "Unit of Stored Data" is "Lower Byte +
Upper Byte" and "Data Length" is an odd number
of bytes, stores the last byte to the upper byte.
When "Unit of Stored Data" is "Lower Bytes Only"
and "Data Length" is an odd number of bytes,
stores the last byte without any byte swap.
Specify a starting device to store variable value.
The following lists the available devices.
Classification Device name
Device
symbol
Input Relay X
Output Relay Y
Internal Relay M
Latch Relay L
Link Relay B
Data Register D
Internal User
1, 2
Link Register W
R
2
File Register File Register
ZR
Buffer memory G device G
Data Storage Area
Specification
1: Do not set local devices.
2: Set within the device range specified in the following screen.
Project window [Parameter] [PLC Parameter] [Device]