Mitsubishi Electric MELSEC-L Series - Appendix 8.2 Verification Operation of Receive Packet

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Appendix 8 Operation Image and Data Structure of Predefined Protocol Appendix 8.2 Verification operation of receive packet
Appendix 8.2 Verification operation of receive packet
This section describes the verification operation for a receive packet (expected packet) when the E71 communicates
with a connected device with protocols whose communication type includes receiving.
(1) When received data are matched to a receive packet (expected packet)
The receive process is completed when the receive data are compared with the receive packet (expected
packet), and they are matched.
(2) When multiple receive packets (expected packets) are specified
The predefined protocol support function enables to register up to 16 receive packets (expected packets).
When the data are received, the registered receive packet (expected packet) is verified in order of registration.
When the receive packet (expected packet) is matched to the data, the receive process is completed.
(3) When received data are not matched to all receive packets (expected packets)
The received data are discarded.
Matched
Received
Receive packet
(expected packet)
Receive data
No.1
Not matched
No.2 No.3
Matched
No.16
Received
Receive packets
(expected packets)
Receive data
Sixteen receive
packets can be
registered.
When sixteen
receive packets
were registered
No.1
Not matched
No.2
Not matched
No.16
Discarded
Receive packets
(expected packets)
Receive data