Mitsubishi Electric MELSEC iQ-R Series User Manual page 58

Handshaking operations for each message
This section shows the handshake operations when message sending was successful, unsuccessful, and canceled.
No. Event
1 Transmission completed
Spooling succeeded
2 Sending failure
Spooling failed
3 Transmission cancelled
When a message excluded from spooling is sent during spooling, operation depends on the communication state.
• When the communication state is Online, message sending fails.
• When the communication state is Offline or a line disconnection has occurred, sending is canceled.
7 BASIC FUNCTIONS
56
7.3 Programmable Controller CPU Link Function
Description
The message was transmitted.
The spool message was spooled.
The message was not transmitted (including the
message creation failure).
The spool message was not spooled.
The transmission request was cancelled due to line
disconnection or offline status.
Operation
Sending request trigger relay: OFF
Sending request trigger relay: Not OFF
Transmission failed relay: ON
Sending request trigger relay: OFF
Transmission failed relay: ON