ABB ACS880 Firmware Manual page 376

376 Parameters
No. Name / Range /
Selection
31.37 Ramp stop
supervision
0...300 %
31.38 Ramp stop
supervision delay
0...32767 s
31.40 Disable warning
messages
b0 Overvoltage
b1 Reserved
b2 Encoder 1
b3 Encoder 2
b4 CU Battery
b5 EmergencyStop Off2
b6 EmergencyStop Off1
Off3
b7...15 Reserved
Description
Parameters 31.37 Ramp stop supervision
Ramp stop supervision
change rate, provide a supervision function for normal
(ie. nonemergency) ramp stopping.
The supervision is based on either
• observing the time within which the motor stops,
or
• comparing the actual and expected deceleration
rates.
If this parameter is set to 0%, the maximum stop time
is directly set in parameter 31.38. Otherwise,
defines the maximum allowed deviation from the
expected deceleration rate, which is calculated from
parameters 23.11...23.19. If the actual deceleration rate
(1.29) deviates too much from the expected rate, the
drive trips on 73B1 Stop
status word 2, and coasts to a stop.
If 31.37 is set to 0% and
stop supervision is disabled.
Maximum deviation from expected deceleration rate.
If parameter 31.37 Ramp stop supervision
this parameter defines the maximum time a ramp stop
is allowed to take. If the motor has not stopped when
the time elapses, the drive trips on
sets bit 14 of 6.17 Drive status word
stop.
If 31.37 is set to a value other than 0%, this parameter
defines a delay between the receipt of the stop
command and the activation of the supervision. It is
recommended to specify a short delay to allow the
speed change rate to stabilize.
Maximum ramp-down time, or supervision activation
delay.
Selects warnings to be suppressed. The parameter is
a 16-bit word with each bit corresponding to a warning.
Whenever a bit is set to 1, the corresponding warning
is suppressed.
The bits of this binary number correspond to the
following warnings:
A3A1 DC link overvoltage
A7E1 Encoder (for encoder 1)
A7E1 Encoder (for encoder 2)
A5F4 Control unit battery
AFE1 Emergency stop (off2)
AFE2 Emergency stop (off1 or off3)
and
delay, together with 1.29 Speed
31.37
failed, sets bit 14 of 6.17 Drive
31.38 is set to 0 s, the ramp
is set to 0%,
73B1 Stop
2, and coasts to a
Def / Type
FbEq 16b / 32b
31.38 - / real32
1 = 1 % / 0 = 1 %
0 s / real32
failed,
1 = 1 s / 1 = 1 s
- / uint16