Panasonic FP0R User Manual page 90

COM port (RS485)
Item
Interface
Communication mode
Transmission distance
Baud rate
Communication method
Synchronous method
Transmission line
Computer link
Transmission General-purpose
code serial communication
MODBUS RTU
Data length
Communicati
Parity
on format (to
be set by Stop bit
system
Start code
Note4)
register)
End code
No. of connected units
Communication function
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 settings
Port type
Tool port
COM port (RS485)
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.
7-6
Description
RS485
1:N communication
Max. 1200 m
19200, 115200 bps
Two-wire, half-duplex transmission
Start stop synchronous system
Shielded twisted-pair cable or VCTF
ASCII
ASCII, Binary
Binary
7bit / 8bit
None/Even/Odd
1bit / 2bit
STX/No STX
CR/CR+LF/None/ETX
Max. 99 units
Note2) 5)
(Max. 32 units when our C-ENT adapter is connected.)
Computer link (master/slave)
Modem initialization
General-purpose serial communication
Modbus RTU (Master/Slave)
PC(PLC) link
Baud rate
9600 bit/s
115200 bit/s
Note1) 2)
Note2) 3)
Data length Parity
8 bits Odd
8 bits Odd
Stop bit
1 bit
1 bit