User`s manual

FX communication
FX
2N
-232IF 10
10-1
10
10. FX
2N
-232IF
10.1 Introduction
The RS-232C interface block FX
2N
-232IF (hereinafter referred to as “232IF”) is connectable with
to the FX
2N
, FX
2NC
programmable controller to realize full duplex serial data communication with
another RS-232C interface such as a personal computer, bar code reader, printer, etc.
10.1.1 Outline of Product
1 ) Applicable programmable controller
The 232IF can be connected as a special block of the FX
2N
,
FX
2NC
programmable controller.
2 ) Control instructions
Send/receive data is received and sent and diversified control commands are manipulated
using the FROM/TO instruction.
3 ) Number of I/O points and connection method
The 232IF occupies 8 I/O points that can be allocated as either inputs or outputs. However
the capacity of the 5 V power supplied from the programmable controller is limited.
The current consumption of the 5 V power of the 232IF is 40 mA. Make sure that the total
current consumption of the 5 V power including other special blocks is equivalent to or less
than that available.
4 ) Communication method
Full duplex start-stop synchronization and no protocol procedure are used. The
communication format can be specified using buffer memories (BFMs).
5 ) Send/receive buffer
The send/receive buffer can accommodate 512 bytes/256 words.
When the RS-232C interlink connection mode is used, data exceeding 512 bytes/256 words
can also be received.
6 ) ASCII/HEX conversion function
The function to convert and send a hexadecimal numeric (0 to F) saved in the send data
buffer as well as the function to convert a received ASCII code into a hexadecimal numeric (0
to F) and save it to the receive buffer are provided.