Verification Operation Of Receive Packet; When Received Data Are Matched With A Receive Packet; When Multiple Receive Packets (Expected Packets) Are Specified - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Verification operation of receive packet

This section describes the receive packet (expected packet) verification operation for communication with an external device
when the protocol communication type contains reception.
When received data are matched with a receive packet (expected packet)
The received data is compared against the receive packet (expected packet), and the receive processing completes when the
verification matches.
Receive packet
(expected packet)
Receive data

When multiple receive packets (expected packets) are specified

Up to sixteen receive packets (expected packets) can be registered with the predefined protocol support function. When the
data are received, the registered receive packet (expected packet) is verified in the order of registration. The receive
processing completes as soon as a matching receive packet (expected packet) is found.
Receive packets
(expected packets)
Receive data
When received data does not match with all receive packet (expected packet)
If the received data does not match any of the registered receive packets (expected packets), the received data is discarded.
Receive packets
(expected packets)
Receive data
APPX
400
Appendix 10 Operation Image and Data Structure of Predefined Protocol
Matched
No.1 No.2
Not matched
No.1 No.2
Not matched
Received
No.3
Sixteen receive
packets can be
Matched
registered.
Received
When sixteen
No.16
receive packets
were registered
Not matched
No.16
Discarded