1

FWD-42LX1
FWD-32LX1
1. Communication Parameter
Communication system RS-232C
Synchronous system Asynchronous communication
Baud rate 9600 bps
Character length 8 bit
Parity None
Start bit 1 bit
Stop bit 1 bit
Flow control None
2. Pin Configuration
12345
Display side (D-sub 9-pin)
_ External view _
6789
12345
6789
Host side (D-sub 9-pin)
_ External view _
FWD-42LX1/N
FWD-32LX1/N
Personal computer
Pin No. Signal
1NC
2RD
3TD
4NC
5 GND
6NC
7NC
8NC
9NC
Pin No. Signal
1NC
2RD
3TD
4NC
5 GND
6NC
7NC
8NC
9NC
3. Communication Data Format

(a) Control (Host → Request of Write to Display)

No. Item Value
1 Header 0x8C:Control
2 Category 0xXX
3 Function 0xXX
4 Data1 (Length) 0xXX
5 Data2 (Data1) 0xXX
: : 0xXX
: : 0xXX
X DataX 0xXX
X+1 Check Sum 0xXX
*Check Sum: Sum total of 1 to X. Lower one-byte data is validated when a
value exceeds 255 (1 byte).
*Set the command interval to 500 ms or more when transmitting the
Control command continuously.
*Set the command interval to 500 ms or more when transmitting the same
command (Enquiry) after the Control command.

(b) Enquiry (Host → Request of Read to Display)

No. Item Value
1 Header 0x83:Enquiry
2 Category 0xXX
3 Function 0xXX
4 Data1 0xFF
5 Data2 0xFF
6 Check Sum 0xXX
*Check Sum: Sum total of 1 to 5. Lower one-byte data is validated when a
value exceeds 255 (1 byte).