External Speed Limitation; Settings; Diagnostics - ABB ACS800 Firmware Manual

External speed limitation

The External speed limitation function limits the speed reference to a predefined
value when an external speed limit signal is activated. You can define the speed
limits in parameters
the external speed limit signal has to be configured in parameter
LIM PTR. The speed limit signal is a pointer parameter, and hence, it can be
configured to a DI, PLC DI using fieldbus communication or to any other signal bits.
When the speed limit signal is activated, the drive speed reference is limited to
MAX EXT LIM SPD if the motor is running in the forward direction or to
EXT LIM SPD if the motor is running in the reverse direction. The limitation status
can be monitored using bits
maximum external speed limit and
minimum external speed limit.
SPEED
REF IN
11.04
11.05
11.07
11.08

Settings

Parameter
10.20
20.22
20.23

Diagnostics

Actual signal
03.14 bit 10
03.14 bit 11
20.22 MAX EXT LIM SPD and
03.14 AUXILIARY STATUS WORD 4
SPEED
LIMITER
IN
EXT1/EXT2
0
SPEED REF
EXT 1 MIN
EXT 1 MAX
EXT 2 MIN
EXT 2 MAX
Additional information
Configuring the external speed limit signal
Configuring the maximum external speed limit
Configuring the minimum external speed limit
Additional information
Maximum speed limited with activation of external speed signal
Minimum speed limited with activation of external speed signal
20.23
03.14 AUXILIARY STATUS WORD 4
EXT SPD LIM PTR
10.20
SPEED
LIMITER
IN
MAX EXT
20.22
LIM SPD
MIN EXT
20.23
LIM SPD
MIN EXT LIM SPD, while
10.20 EXT SPD
20.23 MIN
bit 10 for
bit 11 for
EXT SPEED
0
LIMIT REF
Program features
85
20.22