J Communications Based on Modbus Protocol
186
J.2 Setting
After the CSD-709 is connected to the RS-232C or RS-422/485 card, you can establish
communications using the Modbus protocol. The table below shows the functions used for
communications based on the Modbus protocol.
Item Function Setting
Operating modes F-45 3 (Modbus)
Output target F-46
0 (Display interlock), 1 (Track), 2 (Peak),
3 (Combination of load display and status)
Communication
settings
F-47 Set with a five-digit numerical value.
Digit Details
First digit Set the data bit length using 0 (7 bit) or 1 (8 bit).
Second digit
Set the parity bit using 0 (No parity),
1 (Even parity), or 2 (Odd parity).
Third digit Set the stop bit using 0 (1 bit) or 1 (2 bit).
Fourth digit
Set the baud rate using 0 (1 200 bps),
1 (2 400 bps), 2 (4 800 bps), 3 (9 600 bps),
4 (19 200 bps), 5 (38 400 bps), 6 (57 600 bps), or
7 (115 200 bps).
Fifth digit Set the terminator using 0 (CR) or 1 (CR+LF).
Decimal point F-48 0 (Hide), 1 (Add)
Number of digits
of unit
F-49 0 (Two digits), 1 (Three digits)
Address
F-50 00 ~ 31
Change between
RS-422 and
RS-485
F-51 00 (RS-422), 1 (RS-485)
Return data delay
in RS-485
F-52 0 ~ 99 (unit: 10 ms)
Unit output
character
CF-05
0 (None), 1 (Gram), 2 (Kilogram), 3 (Pound), 4 (Ton), 5 (Newton),
6 (Kilonewton), 7 (Pascal), 8 (Kilopascal), 9 (Megapascal)
The address [00] shows the broadcast address.
Any of the following values is determined as the silent interval of the Modbus protocol, depending on
the baud rate set to function F-47 (communication settings).
Baud rate (bps) Silent interval (ms)
1 200 35.00
2 400 17.50
4 800 8.75
9 600 4.50
19 200 2.25
38 400 1.25
57 600 0.75
115 200 0.50
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