3-18
Displaying running status
To display the running status in hexadecimal format, each state has been assigned to bit 0 to 15 as
listed in Table 3.7. Table 3.8 shows the relationship between each of the status assignments and the
LED monitor display. Table 3.9 gives the conversion table from 4-bit binary to hexadecimal.
Table 3.7 Running Status Bit Allocation
Bit Notation Content Bit Notation Content
15 BUSY 1 when function code data is being
written.
7 VL 1 under voltage limiting control.
14 Always 0. 6 TL Always 0.
13
WR
Always 0. 5 NUV 1 when the DC link circuit voltage
is higher than the undervoltage
level.
12 RL 1 when communication is effective
(when run commands and set
frequencies commands are issued
via communications).
4 BRK Always 0.
11 ALM 1 when an alarm has occurred. 3 INT 1 when the inverter output is
stopped.
10 DEC 1 during deceleration. 2 EXT 1 during DC braking.
9 ACC 1 during acceleration. 1 REV 1 during running in the reverse
direction.
8 IL 1 under current limiting control. 0 FWD 1 during running in the forward
direction.
Table 3.8 Running Status Display
LED No. LED4 LED3 LED2 LED1
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Notation BUSY WR RL ALM DEC ACC IL VL TL NUV BRK INT EXT REV FWD
Binary 1 0 0 0 0 0 1 1 0 0 1 0 0 0 0 1
Example
Hexa-
decimal
on the
LED
monitor
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