FX communication
FX
2N
-232IF 10
10-14
7 ) b7 (being received)
b7 is turned on after the head data is received until the receive completion status (BFM #28
b1) is set.
8 ) b8 (RS), b9 (ER), b12 (DR), b13 (CD), b14 (CS), b15 (CI)
These bits indicate the ON/OFF status of the control signals.
10.2.18 Error Code <BFM #29>
For error code, refer to chapter 12.
10.2.19 Model Code <BFM #30>
The model code of the 232IF is “K7030”.
The model code is a fixed code assigned to each special extension equipment handled by the
FROM/TO instruction. The programmable controller can distinguish the equipment type by
reading this code.
10.2.20 Send Byte Count <BFM #1000>
Setting range: 0 to 512 (when buffer data length is 16 bits)
0 to 256 (when buffer data length is 8 bits)
The BFM #1000 specifies how many bytes out of 512 bytes/256 words in the 16-bit send buffers
(BFMs #1001 to #1256) are to be sent.
10.2.21 Send Buffers <BFMs #1001 to #1256>
Each of them is a 16-bit buffer to save the send data, and accommodates 512 bytes/256 words.
Note; Send/receive buffer structure
A numeric in the send/receive buffer is treated as hexadecimal (HEX).
b15
3
0 0 1 1 0 0 1 0 0 1 0 0 0 0 0 1
Example:#1001 (16-bit buffer)
b0
2
4 1
32 H=[2] 41 H=[A]
Upper bits Lower bits
1byte 1byte
1word
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