Unipulse F701+, Operation Manual

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74
6 Useful Functions
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Chapter
6
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Two-wire (multi point)
6-11-3. Settings related to RS-485
■
Settings for RS-485 I/F
The setting values for the PC or PLC to be connected and RS-485 of the main unit must be the same.
■
ID settings
- When connecting multiple units of F701+, set
a separate ID no. for each F701+.
- If a start command including an ID no. is
transmitted from the host, only one device
will be able to transmit, and it will be possible
to read weight data, read/change setting
values, give commands, etc.
- Be sure to transmit an end command before making another F701+ able to transmit/receive.
- Since tri-state control is performed using start and end commands, normal communication is not
possible due to output collision if only start commands are transmitted to multiple devices.
- If the ID no. is "0000", the device will be able to transmit/receive from the moment the power is
turned ON. Therefore, be sure to set an ID no. other than "0000" when connecting multiple devices.
A B
A B A B A B
Twisted pair wires
F701+ F701+ F701+ F701+
Terminator
A
B
Host
Terminator
[Settings for RS-485 I/F] (setting mode 4-4)
Terminator
Stop bit
6: Printer mode
5: 115.2kbps
4: 57600 bps
3: 38400 bps
2: 19200 bps
1: 9600 bps
0: 4800 bps
Baud rate selection
2: Modbus-RTU
1: Communication mode 0/CR+LF
0: Communication mode 0/CR
1: 2 bits
0: 1 bit
1: 8 bits
0: 7 bits
Character length
Parity bit
2: Even
1: Odd
0: None
[ID No.] (setting mode 4-5)
(Input range: 0 to 9999)
For Modbus-RTU
(Input range: 0 to 32)