Panasonic FPS Series User Manual page 300

FPΣ User's Manual
2)
The values for the transmission distance, baud rate and number of stations should be within the values
noted in the following graph.
y
99
70
40
0
When using a baud rate of 2400bit/s to 38400bit/s, a maximum of 99 stations and a maximum transmission
distance of 1200m are possible.
3)
When a C-NET adapter is connected to the RS485 interface, you can only specify a baud rate of 9600bit/s
or 19200bit/s.
4)
The start and end code can only be used in program controlled communication.
5)
If necessary, adjust the response time for the FPΣ's RS485 interface using the SYS1 instruction (see page
169).
6)
Setting the station number setting switch to a value other than 0 enables the switch setting, and the system
register setting is ignored. In this case, the same station number is allocated to all communication ports. A
maximum of 31 stations can be specified with the switch.
7)
FPG-COM3: Bridge the E terminal and the free (-) terminal on the first and on the last station of the
transmission line to terminate the data bus.
FPG-COM4: Set SW1-1 to ON on the first and on the last station of the transmission line to terminate the
data bus. There is no terminating resistor at the RS232C port.
8)
When the RS485 port (COM port 1) of FPG-COM4 is used, set the baud rate in the system registers to
either 19200bit/s or 115200bit/s. Set DIP switch SW1-2 of the cassette to the same setting (see page 162).
The baud rate of the RS232C port of FPG-COM4 can only be set in the system registers. For PLC Link, the
baud rate is fixed at 115200bit/s.
9)
Lower baud rates of 300, 600, and 1200bit/s can be specified using the SYS1 instruction. However, this will
not change the setting value of the system register.
700 1000 1200
12.2 Performance Specifications
x
transmission distance [m]
y number of stations
for a baud rate of 115200bit/s
1
for a baud rate of 57600bit/s
2
x
283