gefran ADV200 Functions Description And Parameters List

ADV200 • Functions description and parameters list 133
Openingphase:
Setting of parameters 3172, 3176, 3182, 3184, 3186.
When the drive is in the “Driveready” and “Start” conditions (following the enable and start commands) the
brake is opened (i.e. the signal corresponding to PAR 3180 Brakecontrolmon, which must in turn be as-
signed to a digital output, is raised) provided a further condition, dened by setting parameters 3182, 3184,
3186, is met once the Speedsetpoint(PAR 664, considered as an absolute value) has reached the value set
in PAR 3176 Brakeopenspdthr.
Parameter 3182 Brakeopenthrsel is used to establish whether the comparison is to be made with the drive
output current (value 1, Outputcurr) or with the torque supplied (value 0, “Torqueref%”).
Parameters 3184 Brakeopenthrand 3186 Brakeopenthrsrcare used to dene the value of the threshold
at which the comparison is made (this can also be set via analog input, eldbus, Pad, FastLink…).
If the value of parameter 3182 Brakeopenthrsel is equal to Outputcurr, the brake is opened provided one
of the following 3 conditions is met:
• The threshold dened by parameters 3184/3186 is positive, and the value of parameter 250 Outputcur-
rentis higher than the threshold.
• The threshold dened by parameters 3184/3186 is negative, and the value of parameter 250 Outputcur-
rentis less than the threshold.
• The threshold is zero, therefore the brake is always opened.
If the value of parameter 3182 Brakeopenthrsel is equal to “Torqueref%”, the brake is opened provided
one of the following 3 conditions is met:
• The threshold dened by parameters 3184/3186 is positive, and the value of parameter 2386 Torqueref%
is higher than the threshold.
• The threshold dened by parameters 3184/3186 is negative, and the value of parameter 2386 Torqueref
% is less than the threshold.
• The threshold is zero, therefore the brake is always opened.
Threshold values are expressed as a percentage and refer to the rated current or torque values of the drive.
Parameter 3172 Brakeopendelay can be set to dene the delay between the moment the double opening
condition occurs (speed reference + current or torque) and the time the open command is actually sent by the
drive.
If the speed reference condition is met but not the current or torque condition, the drive enters a Brakefault
alarm condition, which can be managed via parameter 4684 Brakefaultactivity, (set by default to Disable).
Closingphase:
If the drive is disabled (also due to any alarms that are capable of disabling it) the close brake command is sent
immediately, regardless of the operating condition.
For normal closing, set parameters 3174, 3178.
When the brake has been opened, it waits for the “Stop” command, then sends the close command when the
speed reference is less than the value set in parameter 3178 Brakeclosespdthr. Parameter 3174 Brake
closedelaycan be used to enter a delay between the moment the closing condition occurs and that in which
the close command is actually sent by the drive. After the closing condition, it is also possible to restart the
drive within the time set in Brakeclosedelay, by sending the normal “Start” command. In that case the timer
is reset and the drive waits for the closing condition again, which starts when a new “Stop” command is sen
In V/f control mode, since there is no precise control of the actual speed and torque, the ‘Speed ref loss’ alarm
is not managed, which means that external controls must be used to detect any possible loss of a suspended
load.
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gefran ADV200 Specifications

General

Brand	gefran
Model	ADV200
Category	Inverter
Language	English