Program features
88
Settings
Diagnostics
Torque proving (Crane system check)
Torque proving (Crane system check) consists of electrical and mechanical tests.
Both functions are tested at the same time, and if the electrical test is accepted, the
mechanical test is not continued. You can enable both functions with parameter
TORQ PROV SEL:
• electrical test with Torque proving (parameters
and
TORQ PROV
FLT TD) to make sure that electrical components are healthy.
• mechanical test with brake slip (parameters
MOTOR SLIP SPD and
SLIP FAULT DELAY) to make sure that the motor brake is not slipping.
Torque proving ensures that the drive is able to produce torque before it releases the
brake and starts the crane operation. The function is mainly intended for hoist drives,
but it can also be used with drives that control other crane motions if they have the
encoder feedback in use.
Torque proving gives a positive torque reference when the mechanical brake is still
on. If the Torque proving is successful, in other words, the actual torque of the drive
reaches the reference level, the drive allows the brake to open and initiates the next
step in the starting sequence.
The time to execute the torque proving sequence is so short (executed in 20 ms
cycle time) that the operator does not experience any time delay in the starting
sequence. The maximum allowed time for the torque to be proved is set in
parameter
TORQ PROV FLT TD. The drive waits for a time period of
the torque to be proved. An unsuccessful torque proving will trip the drive on TORQ
PROVE FLT.
The function operates as follows (see the block diagram below):
• Parameter
TORQ PROV SEL (= TRUE) activates the function.
• The output signal TORQ PROV OK is “0” until the Torque proving is performed.
Parameter
Additional information
Activation of the function
Speed deviation limit
Delay for the fault trip
Speed change per second
Actual signal
Additional information
bit 1
Speed match fault bit
Faults
Excessive speed error when running at set point or rate of change of actual
speed is low
Содержание ACS 800 Series
Страница 1: ...ACS800 Firmware Manual Crane Control Program N697 ...
Страница 4: ......
Страница 26: ...Start up and control through the I O interface 26 ...
Страница 36: ...Quick start up guide 36 ...
Страница 52: ...Control panel 52 ...
Страница 105: ...Program features 105 Figure Control diagram for Shaft synchronisation executed in 20 ms ...
Страница 126: ...Program features 126 The figures below show speed limits according to different load conditions ...
Страница 128: ...Program features 128 ...
Страница 150: ...Application macros control location EXT1 EXT2 150 ...
Страница 228: ...Actual signals and parameters 228 ...
Страница 299: ...Adaptive Programming examples for crane control 299 ...
Страница 305: ...Adaptive Programming examples for crane control 305 ...
Страница 312: ...Adaptive Programming examples for crane control 312 The following figures show the previous example enlarged ...
Страница 314: ...Adaptive Programming examples for crane control 314 The following figures show the previous example enlarged ...
Страница 318: ...Analogue Extension Module 318 ...
Страница 332: ...Additional data actual signals and parameters 332 ...
Страница 333: ...DriveWindow 333 DriveWindow DriveWindow connected to the ACS800 RMIO RDCO board and channel CH3 ...
Страница 334: ...DriveWindow 334 ...
Страница 335: ...Control block diagrams 335 Control block diagrams ...
Страница 336: ...Control block diagrams 336 ...
Страница 337: ...Control block diagrams 337 ...
Страница 338: ...Control block diagrams 338 ...
Страница 340: ...www abb com drives www abb com drivespartners Contact us 3AFE68775230 Rev E EN 2012 09 25 ...