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108
Brake sequence (Pr. 60, Pr. 278 to Pr. 285)
(3) Parameter setting
1. Set speed control in Pr.800 "control system selection". (Refer to page 169.)
2. Set "7 or 8" (brake sequence mode) in Pr. 60.
To ensure more complete sequence control, it is recommended to set "7" (brake opening completion signal input)
in Pr. 60.
3. Refer to the following table and set the parameters.
* This function is valid during vector control.
(4) Setting terminals
The terminals must be assigned using Pr. 180 to Pr. 183 and Pr. 187 and Pr. 190 to Pr. 192 and Pr. 195.
Pr. 60
Setting
Operation Mode Description
0 Normal operation mode ——
7
Brake sequence mode
With mechanical brake opening
completion signal input
This function causes the inverter to output the mechanical
brake operation timing signal for elevating application.
For the function details and setting method, refer to Pr.
278 to Pr. 285 (brake sequence function).
8
Without mechanical brake
opening completion signal input
REMARKS
Even if the intelligent operation function has been selected, inputting the jog or RT (second function selection) signal during an
inverter stop will switch to the normal operation and give priority to jog operation or second function selection.
After intelligent operation has been started, neither the jog signal nor the RT signal is accepted.
Parameter Name
Setting
Range
Description
278 Brake opening speed 0 to 900r/min
Set the value higher than the Pr. 13 "starting speed".
Setting is enabled only when Pr. 278
≤
Pr. 282.
279 Brake opening current 0 to 200%
Generally, set this parameter to about 50 to 90%. If the setting is too low,
the load is liable to drop due to gravity at start.
Suppose that the rated inverter current is 100%.
280
Brake opening current
detection time
0 to 2s Generally, set this parameter to about 0.1 to 0.3s.
281
Brake operation time
at start
0 to 5s
Pr. 60 = 7: Set the mechanical delay time until the brake is loosened.
Pr. 60 = 8: Set the mechanical delay time until the brake is loosened +
about 0.1 to 0.2s.
282
Brake operation
speed
0 to 900r/min
Generally, set the Pr. 278 setting + 1 to 2r/min to this parameter.
Setting is enabled only when Pr. 282
≥ Pr. 278.
283
Brake operation time
at stop
0 to 5s
Pr. 60 = 7: Set the mechanical delay time until the brake is closed + 0.1s.
Pr. 60 = 8: Set the mechanical delay time until the brake is closed +
about 0.2 to 0.3s.
284
Deceleration
detection function
selection
0 Deceleration is not detected.
1
If deceleration is not normal during deceleration operation, the inverter
alarm (E.MB2) is provided to shut off the output and turn off the brake
opening request signal (BOF).
285
Overspeed detection
speed*
0 to 900r/min
If (detected speed) - (output speed) > Pr. 285, the inverter alarm
(E.MB1) is provided to shut off the output and turn off the brake opening
request signal (BOF).
9999 Overspeed is not detected.
CAUTION
When using this function, set the acceleration/deceleration time to 1s or longer.
Signal
Brake Sequence Mode
Pr. 60 = 7
(with mechanical brake opening
completion signal)
Pr. 60 = 8
(without mechanical brake opening
completion signal)
BOF Brake opening request Brake opening request
BRI Brake opening completion signal ——
CAUTION
1. The brake opening completion signal (BRI) is a parameter valid when Pr. 60 = 7.
2. Changing the terminal function using any of Pr. 180 to Pr. 183, Pr. 187, Pr. 190 to Pr. 192, and Pr. 195
may affect the other functions. Confirm the functions of the corresponding terminals before making
setting. (Refer to page 150.)