3-21
Displaying running status
To display the running status in hexadecimal format, each state has been assigned to bits 0 to 15 as
listed in Table 3.12. Table 3.13 shows the relationship between each of the status assignments and
the LED monitor display. Table 3.14 gives the conversion table from 4-bit binary to hexadecimal.
Table 3.12 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 bus voltage is
higher than the undervoltage level.
12 RL
1 when communication is enabled
(when ready for run and frequency
commands via communications
link).
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 3.13 Running Status Display
LED No. LED4 LED3 LED2 LED1
Bit 1514 13 12 11109876543210
Notation BUSY WR RL ALM DEC ACC IL VL TL NUV BRK INT EXT REV FWD
Binary 10 0 0 0 01100100001
Example
Hexa-
decimal
on the
LED
monitor
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