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Mitsubishi Electric MELSEC-L Series - Page 351

Mitsubishi Electric MELSEC-L Series
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349
APPENDICES
A
Appendix 8 Operation Image and Data Structure of Predefined Protocol
Appendix 8.3 Data examples of packet elements
(3) Non-verified Reception
The following shows the usage example for a Non-verified Reception element.
Setting the packet format as above and setting the "Non-verified Reception" enable the followings.
Only necessary information can be stored in a device of the CPU module or the buffer memory.
Only one protocol (packet) is required even when the data that may change in each communication are
included in the receive packet.
Necessary information for users
Example of a packet setting
Example of a packet format of the connected device
Reading data
When the information is unnecessary
for users and the data
(including the number of characters)
are variable
Non-verified reception is
set in the elements.
Product
code
Manufacturer
code
Country
code
Identification
code
5 bytes2 bytes
STX
1 byte
EXT
1 byte
2 bytes
5 bytes
Non-conversion
variable
2 bytes
Static data
1 byte
Static data
2 bytes
Non-verified reception (variable number of characters)
Variable number of
characters
Variable number of characters

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