Panasonic FP0R Series, User Manual

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13-7
COM port (RS485 port)
Item
Description
Interface
RS485
Communication mode 1:N communication
Transmission distance Max. 1200 m
Note1) 2)
Baud rate 19200, 115200 bps
Note2) 3))
Communication method Two-wire, half-duplex transmission
Synchronous method Start stop synchronous system
Transmission line
Shielded twisted-pair cable or VCTF
Transmission
code
Computer link ASCII
General-purpose serial
communication
ASCII, Binary
MODBUS RTU Binary
Communication
format (to be set
by system
register)
Note4)
Data length 7 bits/8bits
Parity
7 bits/8bits
Stop bit None/Even/Odd
Start code STX/No STX
End code CR/CR+LF/None/ETX
No. of connected units
Note2) 5)
Transmits from bit 0 character by character.
Communication function
Computer link (Master/Slave)
Modem initialization
General-purpose communication
MODBUS RTU (Master/Slave)
PC(PLC) link
Note1) When connecting a commercially available device that has an RS485 interface, please confirm
operation using the actual device. In some cases, the number of units, transmission distance, and baud
rate vary depending on the connected device.
Note2) The values for the transmission distance, baud rate and number of units should be within the
values noted in the graph below.
Note3) The settings of the baud rate switches on the side of the unit and the system register No. 415
should be the same. Only 19200 bps can be specified when the C-NET adapter is connected with the
RS485 interface.
Note4) The start code and end code can be used only in the general-purpose serial communication
mode.
Note5) Unit numbers should be registered by the system register.
Factory default
Port type Baud rate Data length Parity Stop bit
Tool port 9600 bit/s 8 bits Odd 1 bit
COM port (RS485 port) 115200 bit/s 8 bits Odd 1 bit
Note:
If the potential difference between the power supplies of RS485 devices exceeds 4 V, the unit may not
communicate as it is the non-isolated type. The large potential difference leads to the damage to the
devices.