Mitsubishi Electric MELSEC iQ-R Series User Manual page 57

Important points when configuring to Handshake (for each message)
■Reception delay
Configure a 20 ms trigger hold time in the settings of secondary message sending for transactions during primary message
reception.
Programmable
controller CPU
Receive
notification
detection
Receive notification
relay off
Transmission request
relay on
■Primary message sending after secondary message sending
Make sure that the sending request trigger of the secondary message has been switched OFF by the SECS/GEM
communication software after the secondary message was sent and before the primary message of the next transaction is
sent.
Programmable
controller CPU
Transmission request
relay on
Transmission request
*1
relay on
*1 Turns ON after checking that the sending request is OFF.
Shared memory/
Device
Receive notification
Shared memory/
Device
Transmission request
relay off
Transmission request
relay off
SECS/GEM communication
software
Primary message reception
Transmission request
detection
(20ms hold time)
Secondary message
transmission
SECS/GEM communication
software
Transmission request
detection
Secondary message
transmission
Transmission request
detection
Primary message transmission
7 BASIC FUNCTIONS
7.3 Programmable Controller CPU Link Function
Host
7
Host
55