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5.3
System Configuration
This section outlines the system configuration required to use inverter communication.
You can use the inverter communication function in the CPU module using the built-in RS-485 port, communication board,
and communication adapter.
Allotment of serial ports is set to the following fixed numbers, regardless of system configuration.
■FX5U CPU module
CH4: Communication adapter-2
CH3: Communication adapter-1
CH1: Built-in RS-485 port
CH2: Communication board
Communication device
Built-in RS-485 port
Communication
FX5-485-BD
board
Communication
FX5-485ADP
adapter
*1 Assigned to CH3 or CH4 in order of proximity to CPU module.
5.4
Specifications
This section describes the communication specifications and performance of the inverter communication function.
Communication specifications
Items
Number of connectable units
Transmission standard
Maximum overall distance
Protocol type
Control procedure
Communication method
Baud rate
Character
format
Start bit
Data length
Parity bit
Stop bit
Serial port
Important points in selection
CH1
Since it is built-into the CPU module, there is no need to add
equipment.
CH2
Mounted on top of the CPU module, there is no change in the
installation space requirements.
*1
CH3, CH4
Mount the communication adapter to the left of the CPU
module.
Specifications
Maximum of 16
RS-485 standard
When FX5-485ADP is used: 1200 m or less
When using built-in RS-485 port or FX5-485-BD: 50 m or less
Inverter computer link
Asynchronous system
Half-duplex, bi-directional communication
4800/9600/19200/38400/57600/115200 bps
ASCll
1 bit
7 bits/8 bits
None, odd or even
1 bit/2 bits
■FX5UC CPU module
CH4: Communication adapter-2
CH3: Communication adapter-1
CH1: Built-in RS-485 port
Remarks
Only FREQROL-F800/A800 supports 57600
bps or more
5 INVERTER COMMUNICATION
Overall distance
50 m or less
50 m or less
1200 m or less
5.3 System Configuration
5
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