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4.2
Procedures before Operation
The flow chart below shows the MC protocol setting procedures up until data link.
1.
Check communication specifications
For communication specifications, link specifications, and link time, refer to Page 72 Specifications.
2.
System configuration and selection
For select communication equipment, refer to Page 71 System Configuration.
3.
Wiring
For wiring with twisted pair cable, and wiring example, refer to Page 74 Wiring.
4.
Communication settings
For communication settings of communication device, refer to Page 79 Communication Setting.
5.
Program creation
*1 For details on operating procedure of GX Works3, refer to the manual below.
GX Works3 Operating Manual
4.3
System Configuration
This section outlines the system configuration required to use the MC protocol.
You can use up to a maximum of 4 channels (FX5UC is maximum of 3 channels) of MC protocol function in the CPU module
using the built-in RS-485 port, communication board and communication adapters.
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
FX5-232-BD
Communication
FX5-485ADP
adapter
FX5-232ADP
*1 Assigned to CH3 or CH4 in order of proximity to CPU module.
*1
Serial port
Important points for 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.
■FX5UC CPU module
CH4: Communication adapter-2
CH3: Communication adapter-1
CH1: Built-in RS-485 port
4.2 Procedures before Operation
Overall distance
50 m or less
50 m or less
15 m or less
1200 m or less
15 m or less
4 MC PROTOCOL
71
4
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Troubleshooting
