Mitsubishi Electric MELSEC FX Series User Manual page 126

FX communication
3 ) b9 and b8 (control line)
For examples of connecting the equipment corresponding to each setting, refer to section
2.2.2. For operation of control line, refer to section 10.3.
• When bits b9=0 and b8=0 communication is performed using only the SD and RD signals
without using the control line.
• When standard RS-232C mode is specified (b9=0, b8=1), a cross cable is required to
connect the equipment of terminal specifications and a straight through cable is required to
connect the equipment of modem specifications.
• When RS-232C interlink connection mode is specified (b9=1, b8=1), the request to send
(RS) signal functions as the signal to enable receive in the 232IF. When receiving data
exceeds 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.
At this time, when the data saved in the receive buffers is read to data registers in the
programmable controller using the sequence program, the remaining data can be received.
Make sure to perform the RS-232C interlink connection when specifying this mode.
4 ) b11 and b10 (addition of CR and LF)
Set these bits as follows.
• Not added.
• CR only is added.
• CR and LF are added. (b11=1, b10=1)
For the CR/LF addition format, refer to the communication format list shown above.
5 ) b13 and b12 (Availability of check sum and ASCII/HEX conversion)
Set these bits as follows.
• Neither the check sum nor the ASCII/HEX conversion is available. ..... (b13=0, b12=0)
• The ASCII/HEX conversion only is available. ....................................... (b13=0, b12=1)
• The check sum only is available. .......................................................... (b13=1, b12=0)
• Both the check sum and ASCII/HEX conversion are available. ............ (b13=1, b12=1)
For the check sum addition format, refer to the communication format list shown above.
(b11=0, b10=0)
(b11=0, b10=1)
FX -232IF 10
2N
10-6