5: S
PECIAL
F
UNCTIONS
FC5A M
ICRO
S
MART
U
SER
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S
M
ANUAL
FC9Y-B1268
5-43
Communication Refresh for Port 3 through Port 7
The expansion communication buffers for port 3 through port 7 are refreshed in the END processing. Communication
refresh option for port 3 through port 7 can be used to refresh the buffers every 10 ms during the scan. When the buffers
are refreshed, the send data in the buffers are sent out and the receive data in the buffer are processed immediately.
COMRF instructions can also be programmed to refresh the communication buffers for port 3 through port 7 in any place
in the ladder program where you want to refresh the buffers. When “Every 10 ms” under “Communication Refresh for
Port 3 through Port 7” is selected in the Function Area Settings dialog box, COMRF instructions programmed in the ladder
program have no effects. For COMRF instruction, see page 11-13 (Advanced Vol.).
Regardless of the communication refresh option for port 3 through port 7, the expansion communication buffers for port
3 through port 7 are always refreshed in the END processing.
Since these settings relate to the user program, the user program must be downloaded to the MicroSmart after changing
this setting.
Communication Refresh for Port 3 through port 7 can be used with the CPU module system program version 220 or
higher.
Programming WindLDR
1.
From the WindLDR menu bar, select
Configuration
>
Comm. Ports
.
The Function Area Settings dialog box for Communication Ports appears.
2.
Click the In END Processing or Every 10 ms button.
In END Processing (Default):
Click this button to refresh the expansion communication buffers for port 3 through port 7 in the END processing.
Every 10 ms:
Click this button to refresh the expansion communication buffers for port 3 through port 7 every 10 ms during the scan.
3.
Click the
OK
button.
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