Data Refresh Of Cyclic Communication - Panasonic AFP0HC32ET User Manual

Cyclic Communication

2.1.3 Data Refresh of Cyclic Communication

In the cyclic communication, data is refreshed in synchronization with operation cycle and RPI.
The refresh of sent data and received data is controlled for each RPI.
<Receiver side>
Input
refresh
: Sends cyclic data.
Refresh
Refresh operation
direction
In refresh processing at the beginning of scan, if there is incoming data in the receive buffer for
Input refresh the cyclic communication, it is copied to the operation memory. After the completion of the
refresh operation, the latest received data will be an object to be refreshed in the next time.
In refresh processing at the beginning of scan, if there is space in the send buffer for the cyclic
Output refresh communication, it is copied from the data area. If the refreshing has not been completed at the
time of data transmission, the previous refreshed data is sent.
Refresh operation when starting communication
• After confirming that the connection is open with the connection open flag, refreshes sent
data.
• After detecting received data with the received data existence flag, refreshes received
data.
• After refreshing received data, the normal reception active flag turns ON.
2-4
<Sender side>
Output
refresh
: Refreshes data.