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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.
Bit
Notation Content
15
BUSY
1 when function code data is be-
ing written.
14
Always 0.
13
Always 0.
WR
12
RL
1 when communication is effec-
tive (when run commands and set
frequencies commands are is-
sued via communications).
11
ALM
1 when an alarm has occurred.
10
DEC
1 during deceleration.
9
ACC
1 during acceleration.
8
IL
1 under current limiting control.
LED No.
LED4
Bit
15
14
Notation
BUSY
WR
1
0
Binary
Hexa-
decimal
on the
LED
monitor
Table 3.7 Running Status Bit Allocation
Table 3.8 Running Status Display
LED3
13
12
11
10
RL
ALM DEC ACC
0
0
0
0
Bit
Notation Content
7
VL
1 under voltage limiting control.
6
TL
Always 0.
5
NUV
1 when the DC link circuit voltage
is higher than the undervoltage
level.
4
BRK
Always 0.
3
INT
1 when the inverter output is
stopped.
2
EXT
1 during DC braking.
1
REV
1 during running in the reverse
direction.
0
FWD
1 during running in the forward
direction.
LED2
9
8
7
6
5
IL
VL
TL
NUV BRK INT
1
1
0
0
1
3-18
LED1
4
3
2
1
0
EXT REV FWD
0
0
0
0
1
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