Wegner Crane CFW500 series Applications Manual - page 55
Parameters Description
Crane | 55
4 – The brake response time to release (P1046) has elapsed, i.e., the brake is released and the load hoisting
with the speed reference 1 adjusted in P1031 begins; in this instant starts elapsing the dwell time at speed
reference 1 (P1036).
5 – With the brake released, the load hoisting remains with the speed reference 1 adjusted in P1031 and dwell
time at speed reference 1 (P1036) continues to count.
6 – The speed reference 2, programmed in P1032, is selected through the digital input DI4. Due to the dwell
time at speed reference 1 (P1036) has not yet elapsed, the load remains at speed reference 1.
7 – The dwell time at speed reference 1 (P1036) has elapsed. The load is then accelerated to that speed
reference 2 selected through the digital input DI4. Note that the motor current increases, but overweight is not
detected while hoisting the load.
8 – The motor reaches the speed reference 2 and keeps hoisting the load at that speed.
9 – The load hoisting command is removed from the digital input DI1 (and consequential removal of the
selection done via the digital input DI4). The motor deceleration begins. The brake remains release.
10 – The motor frequency becomes less than or equal to the threshold adjusted in P1048, and the command to
close the mechanical brake is executed through the removal of the digital output DO1 command; in this instant
starts elapsing the time to enable a new command to brake release (P1050).
11 – The motor is decelerated down to 0 Hz and remains magnetized (If within the period programmed in
P1027 a new hoisting or lowering command does not occur, the motor will be demagnetized). Due to time to
enable a new command to brake release (P1050) has not yet elapsed, a new command to load hoisting or load
lowering will not be accepted.
12 – The time to enable a new command to brake release (P1050) has elapsed, and from this moment a new
command to load hoisting or load lowering will be accepted. The load remains stopped, being held by the
mechanical brake.
3.12.2 Horizontal
P1041 – Brake Release Frequency Threshold
Adjustable
0.0 to 500.0 Hz
Factory Setting: 4.0 Hz
Range:
Proprieties:
Access groups via HMI:
SPLC
Description:
This parameter define the motor frequency threshold to release the brake. In other words, if the total speed
reference (as motor frequency) after the ramp is higher than or equal to the adjusted value, then the brake
release command is permitted. It is also necessary that the other conditions be satisfied for effectively
commanding the brake release.
NOTE!
Setting this parameter in 0.0 disables the motor frequency verification for the brake control.
P1043 – Brake Release Current Threshold
Adjustable
0.0 to 200.0 A
Factory Setting: 0.0 A
Range:
Proprieties:
Access groups via HMI:
SPLC