Mitsubishi Electric MELSEC FX Series - Interlink Mode

FX communication
FX
2N
-232IF 10
10-18
10.3.3 Interlink Mode
Setting BFM #0 (b9, b8) = (1, 1)
*1 Turn off using a program. When it is turned ON, the next data cannot be sent.
*2 Make sure that the CS (CTS) in the FX
2N
-232IF is turned on while the counterpart equipment
is ready for receive.
*3 Time set by BFM #20 (x10ms)
*4 Time set by BFM #21 (x10ms)
*5 The RS (RTS) is turned off when the upper limit of receive byte count specified by the BFM #2
is exceeded.
When the send/receive buffer data length is 16 bits (BFM #0 b14=0), interrupt send from the
counterpart equipment within 30 bytes. When the send/receive buffer data a length is 8bits
(BFM #0 b14=1), interrupt send from the counterpart equipment within 15 bits.
If send is not interrupted, all the send data cannot be received.
*6 Time set by BFM #12 (x10ms)
*7 Turn off using a program. When it is turned ON, the next data cannot be received.
*8 After receive is completed and the data is read, turn off the receive completion flag (BFM #28
b1) using a receive completion reset command (BFM #1 b2).
*9 Read the data as much as the receive byte count (BFM #14) in the receive buffer (BFM #2001
to BFM #2271) to the data registers in the programmable controller, then turn it ON.
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Send/receive
enable
(BFM#1 b0)
Send command
(BFM#1 b1)
Send
completion
(BFM#28 b0)
Receive data
RD(RXD)
Receive
completion
(BFM#28 b1)
Receive
completion reset
command
(BFM#1 b2)
DR(DSR)
RS(RTS)
CS(CTS)
Send data
SD(TXD)
Receive
suspended
(BFM#28 b4)
ON
ON
ON
ON
*2
*2
ON
ON
Data 2
Data 1 Data 3
Data 4
ON
Data 3
BFM#20(X10ms) *3
BFM#20
(X10ms) *4
*1
*1
BFM#12
(X10ms) *6
*8
*7
*9
*7 *7
*8
BFM#20(X10ms) *3
*5