Panasonic FP2 - Page 54

FP2 Serial Data Unit
Communication with External Devices
4 − 12
4.3 Programming When Data is Received
4. The received buffer is cleared.
After the data has been read to the data register using the F150 (READ) instruction, the
Y11 (Receiving Buffer Clear) contact is turned on by the user’s program, and the
contents of the received buffer in the shared memory are cleared.
FP2
CPU unit
FP2 serial data unit
Shared memory
RS232C device
Data register
DT100
Reception completed (X1:on)
Received buffer cleared (Y11:on)
Received
buffer
5. The reception completed flag goes off.
When the received buffer has been cleared, the X1 (Reception completed flag) contact
which went on when data was received from the RS232C port goes off.
FP2
CPU unit
FP2 serial data unit
Shared memory
RS232C device
Data register
DT100
Received
buffer
Reception completed (X1:on)
Received buffer cleared (Y11:on)
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