Packet Elements - Mitsubishi Melsec-L Series User Manual

9.3 Packet Elements

Item
Element Name
Code Type
Setting Value
9 - 7
A packet consists of packet elements.
Up to 32 elements can be placed in a packet, and the maximum data length is 2048
bytes per packet.
The following shows the details of the packet elements. Also, refer to Appendix 5.3 for
an example of packet element data.
(1) Header
Use this element when a specific code/character string exists at the beginning of
a packet.
• When sending: Sends a specified code and character string.
• When receiving: Verifies a header and receive data.
The following table is the items.
Set a name of the element.
Select a data type of the setting value.
ASCII String/ASCII Control Code/HEX
Set data within 1 to 50 bytes.
Code type
ASCII String
ASCII Control Code 00
HEX
POINT
Only one Header can be placed in a packet.
A Header can be placed only at the beginning of a packet.
9 DATA COMMUNICATION USING THE PREDEFINED PROTOCOL
Description
Setting range
20 to 7F
H H
to 1F , and 7F of control code
H H H
00 to FF of hexadecimal data
H H
Remark
-
-
(Setting example)
ASCII String : "ABC"
ASCII Control Code: STX
HEX : FFFF
9 - 7