Receive Header <Bfm #9 (Upper), Bfm #8 (Lower); Receive Terminator <Bfm #11 (Upper), Bfm #10 (Lower); Receive Suspension Waiting Time <Bfm #12 - Mitsubishi Electric MELSEC FX Series User Manual

FX communication
10.2.8 Receive Header <BFM #9 (upper), BFM #8 (lower)>
Setting range: 4 bytes maximum, zero suppression
For the receive data of the 232IF, 4 headers maximum can be specified. When the number of
headers is less than 4, the upper "0"s are ignored (zero suppression).
The register structure and the transmission order are equivalent to those of the send header
described above.
10.2.9 Receive Terminator <BFM #11 (upper), BFM #10 (lower)>
Setting range: 4 bytes maximum, zero suppression
For the receive data of the 232IF, 4 terminators maximum can be specified. When the number of
terminators is less than 4, the upper "0"s are ignored (zero suppression).
As the first terminator, specify an ASCII code from 01
terminators, any ASCII code can be specified.)
The register structure and the transmission order are equivalent to those of the send header
described above.
10.2.10 Receive Suspension Waiting Time <BFM #12>
Setting range: 0 to 32,767 (x 10ms)
In the RS-232C interlink connection mode (BFM #0, b9=1, b8=1), when receiving data exceeding
the receive upper limit byte count (BFM #2), the 232IF sets the request to send (RS) signal to
"OFF" and requests the counterpart equipment to suspend the send operation.
BFM #12 specifies the time after the request to send (RS) signal is turned off until the receive
suspended status (BFM #28 b4) is turned on. The value set to the BFM #12 should be equivalent
to or more than the time after the 232IF sets the request to send (RS) signal to "OFF" until the
send operation of the counterpart equipment is completely suspended.
If the time times out and the receive suspended status (BFM #28 b4) is set to "ON" before the
send operation of the counterpart equipment is not suspended, the remaining data cannot be
received.
Receive byte
count
BFM#2000
Request to send (RS)
Receive suspended
BFM#28 b4
The initial value is "0" (No used).
The initial value is "0" (No used).
The initial value is 0 ms.
542
513
512
Receive upper limit
0
byte count (BFM#2)
Data receive is
suspended.
Suspension waiting time (BFM#12)
0 to 32,767 (×10ms)
H
Spare receive buffers
(BFM#2257 to #2271)
Set to the time in which
the send operation of the
counterpart equipment is
completely suspended.
to 1F . (As the second to fourth
H
FX -232IF 10
2N
10-10