NAiS FP Series User Manual page 137

Communication Cassette
General - purpose serial communication
General - purpose serial communication enables data to be sent back and forth
between an image processing device connected to the COM. port and an external
device such as a bar code reader.
Reading and writing of data is done using a ladder program in the FPΣ, while reading
and writing of data from an external device connected to the COM. port is handled
through the FPΣ data registers.
Data register (DT)
Transmitted data
Received data
Data is sent to and received
from external devices through
the data registers.
FPΣ
Figure 128: FPΣ General - purpose serial communication function
Applicable communication cassette
For 1:1 communication
For 1:N communication
7 - 4
Data transmission using
F159(MTRN) instruction
Data received in reception buffer
. . . . 1 - channel RS232C type (Part No. FPG - COM1)
2 - channel RS232C type (Part No. FPG - COM2)
. . . 1 - channel RS485 type (Part No. FPG - COM3)
FPΣ
Image processing device
Bar code reader