ABB ACS880 - Page 339

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
- / real32
Parameters 31.37 Ramp stop supervision and 31.38 Ramp
stop supervision delay, together with 1.29 Speed 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, 31.37 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 failed, sets bit 14 of 6.17 Drive status word 2, and
coasts to a stop.
If 31.37 is set to 0% and 31.38 is set to 0 s, the ramp stop
supervision is disabled.
Ramp stop
supervision
31.37
1 = 1 % / 0 = 1 %Maximum deviation from expected deceleration rate.0...300 %
0 s / real32
If parameter 31.37 Ramp stop supervision is set to 0%,
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 73B1 Stop failed, sets bit 14 of
6.17 Drive status word 2, and coasts to a 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.
Ramp stop
supervision delay
31.38
1 = 1 s / 1 = 1 sMaximum ramp-down time, or supervision activation delay.0...32767 s
- / uint16Selects 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:
Disable warning
messages
31.40
A3A1 DC link overvoltage
Overvoltageb0
Reservedb1
A7E1 Encoder (for encoder 1)
Encoder 1b2
A7E1 Encoder (for encoder 2)
Encoder 2b3
A5F4 Control unit battery
CU Batteryb4
AFE1 Emergency stop (off2)
EmergencyStop Off1b5
AFE2 Emergency stop (off1 or off3)
EmergencyStop Off1
Off3
b6
Reservedb7…15
1 = 10000h…FFFFh
Parameters 339