Non-Conversion Variable - Mitsubishi MELSEC iQ-F FX5 User Manual

Non-conversion Variable

Use this element to send the data in the data device as a part of a send packet, or store a part of a receive packet to the
device. Use when there is a variable element in the packet format that depends on the system.
For data examples of non-conversion variable, refer to Page 243 Data examples of Non-conversion Variable.
Window
Item
Element Name
Fixed Length/Variable
Length
Data Length/Maximum
Data Length
Unit of Stored Data
Byte Swap
Data Storage Area
Specification
*1 Refer to Page 206 Settable devices.
7 PREDEFINED PROTOCOL SUPPORT FUNCTION
204
7.7 Packet Setting
Description
Set the name of the element.
Fixed Length
Variable Length When
sending
When
receiving
Set the length of data to be transmitted and received. (For the variable length data, set the maximum data length that can be
specified to the data length storage area.)
The range is 1 to 2048.
Lower Byte + Upper Byte When
sending
When
receiving
Lower Bytes Only When
sending
When
receiving
• Disable (Lower → Upper)
When
• Enable (Upper → Lower)
sending
When
receiving
*1
Specify a start device to When
store variable value. sending
When
receiving
Sends and receives the data whose length is fixed.
Specifies the data length at the time of the protocol execution and sends data.
Receives data whose data length is variable.
Sends each one word (2 bytes) data in the data storage area in the order of the lower
byte to the upper byte.
Stores the received data to the data storage area in the order of the lower byte to the
upper byte.
Sends only lower byte of data in the data storage area.
Stores the received data in the only lower byte of the data storage area.
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 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 head device of the area where send data is stored.
Specify a head device of the area where receive data is stored.
*2