2
5. Names and Functions of MDU Parts
…………………………………………………………………………………
27
5.1 Display/operation panel
……………………………………………………………………………………………
27
5.2 MDU terminal block section
………………………………………………………………………………………
28
5.3 CC-Link setting area (with CC-Link communication option)
…………………………………………………
29
5.4 Number of CC-Link communication connectable units and precautions
…………………………………
30
5.5 Installation and wiring for products with CC-Link communication
…………………………………………
31
5.5.1 Terminator installation
……………………………………………………………………………………
31
5.5.2 Shielded wire grounding
…………………………………………………………………………………
31
5.6 MODBUS setting area (with MODBUS communication option)
……………………………………………
32
5.7 Installation and wiring for products with MODBUS communication
………………………………………
33
6. MDU Detailed Specifications
……………………………………………………………………………………………
34
6.1 Precautions for measurement
……………………………………………………………………………………
34
7. MDU Operation Procedure
………………………………………………………………………………………………
36
7.1 Operating method for main menu screen
………………………………………………………………………
37
7.1.1 Display method for protection characteristic setting values
………………………………………
38
7.1.1-1 Protection characteristic setting and setting method for 250 A frame
…………………
38
7.1.1-2 Protection characteristic setting and setting method for 400/800 A frame
……………
39
7.1.2 Method for various settings
………………………………………………………………………………
40
7.1.2-1 Setting method for measurement-related items
……………………………………………
40
7.1.2-2 Setting method for alarms
………………………………………………………………………
42
7.1.2-3 Setting method for LCD
…………………………………………………………………………
44
7.1.2-4 Setting method for date and time
……………………………………………………………
46
7.1.2-5 Setting method for electric energy
……………………………………………………………
47
7.1.2-6 Setting method for measurement items
……………………………………………………
48
7.1.2-7 Setting method for free display
………………………………………………………………
49
7.1.3 Method for resetting alarms
………………………………………………………………………………
50
7.1.4 Method for resetting fault cause/current, maximum value, electric energy,
and reactive energy
………………………………………………………………………………………
50
7.1.5 Method for displaying information screen
………………………………………………………………
51
7.2 Operating method for measurement display screen
…………………………………………………………
52
7.2.1 Switching method for display screen
……………………………………………………………………
52
7.2.2 Measurement display list
…………………………………………………………………………………
53
7.2.3 Fault/alarm display details
………………………………………………………………………………
57
8. Appendix
…………………………………………………………………………………………………………………
58
8.1 Precautions for setting operation
…………………………………………………………………………………
58
8.2 Precautions when setting via CC-Link communication/MODBUS communication
……………………
58
8.3 Communication error codes and solutions
……………………………………………………………………
59
8.4 Troubleshooting
……………………………………………………………………………………………………
59
Summary of Contents for NF250-HEV
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