G-32
FX Series PLC User's Manual - Data Communication Edition
Non-Protocol Communication (FX
2N
-232IF)
5 Creating Programs
5.5 Operation of Control Line
5.5.3
When control line is in RS-232C interlink mode [BFM #0, (b9, b8) = (1, 1)]
*1.
Make sure that the CS (CTS) signal turns ON in the 232IF while the external equipment is ready to
receive.
*2.
When the amount of data already received exceeds the maximum number of receivable bytes
specified by BFM #2, the RS (RTS) signal turns OFF. Accordingly, sending is suspended from the
external equipment within 30 bytes when the send/receive data buffer data length is 16-bit (BFM #0,
b14= 0), or within 15 bytes when the send/receive data buffer data length is 8-bit (BFM #0, b14= 1).
If sending is not suspended, the 232IF cannot receive all sent data.
*3.
Read the amount of received bytes (BFM #14) from the received data buffer (BFM #2001 to 2271) to
data registers in the PLC, and then set it to ON.
Set this bit to OFF in the sequence program.
While it remains ON, the next receiving
complete flag reset command cannot be given.
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Sending/receiving
enable
(BFM#1 b0)
Sending
command
(BFM#1 b1)
Sending
complete
(BFM#28 b0)
RD(RXD)
Receive data
Receiving
complete
(BFM#28 b1)
Receiving
complete flag
reset command
(BFM#1 b2)
DR(DSR)
RS(RTS)
CS(CTS)
SD(TXD)
Send data
Receiving
suspended
(BFM#28 b4)
ON
ON
ON
ON
*1
*1
ON
ON
Message 2
Message 1
Message 3
Message 4
ON
Time set by BFM
#21 multiplied by
10 ms
Set this bit to OFF in the
sequence program. While
it remains ON, the next
receiving complete flag
reset command cannot be
given.
Set this bit to OFF in the
sequence program.
While it remains ON, the
next data cannot be sent.
After receiving is completed and the received data is
read, set the receiving complete flag (BFM #28, b1) to
OFF using the receiving complete flag reset
command.
Time set by BFM #20
multiplied by 10 ms
Time set by BFM #12
multiplied by 10 ms
Message 3
Summary of Contents for FX-485ADP
Page 2: ......
Page 120: ...B 2 FX Series PLC User s Manual Data Communication Edition N N Network ...
Page 188: ...C 2 FX Series PLC User s Manual Data Communication Edition Parallel Link ...
Page 244: ...D 2 FX Series PLC User s Manual Data Communication Edition Computer Link ...
Page 344: ...E 2 FX Series PLC User s Manual Data Communication Edition Inverter Communication ...
Page 700: ...H 2 FX Series PLC User s Manual Data Communication Edition Programming Communication ...
Page 752: ...I 2 FX Series PLC User s Manual Data Communication Edition Remote Maintenance ...
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