Mitsubishi Electric 800 Series Instruction Manual (Function page 412

Pr. Name
280 Brake opening current
A102 detection time
281
Brake operation time at start
A103
282
Brake operation frequency
A104
283
Brake operation time at stop
A105
284 Deceleration detection
A106 function selection
Overspeed detection
285
*1
A107
frequency
292 Automatic acceleration/
F500 deceleration
639 Brake opening current
A108 selection
640 Brake operation frequency
A109 selection
*1 The speed deviation excess detection frequency is used under Vector control or PM sensorless vector control. (Refer to
 Connection diagram
Sink logic
Pr.184 = 15
Pr.190 = 20
MCCB
Power
supply
Start signal
Multi-speed signal
Brake opening completion signal
*1 The input signal terminals differ by the settings of Pr.178 to Pr.189.
*2 The output signal terminals differ by the settings of Pr.190 to Pr.196.
*3 Be careful of the permissible current of the built-in transistors on the inverter. (24 VDC 0.1 A)
NOTE
• The automatic restart after instantaneous power failure function does not operate when brake sequence is selected.
• To use this function, set the acceleration/deceleration time to 1 second or higher.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) or Pr.190 to Pr.196 (Output
terminal function selection) may affect the other functions. Set parameters after confirming the function of each terminal.
 Setting the brake sequence operation
• Set Pr.292 Automatic acceleration/deceleration = "7 or 8 (braking sequence operation)".
To ensure sequence operation, it is recommended to use with Pr.292 = "7" (with brake opening completion signal input).
Initial Setting
value range
0.3 s 0 to 2 s
0.3 s 0 to 5 s
6 Hz 0 to 30 Hz
0.3 s 0 to 5 s
0
0
1
0 to 30 Hz
9999
9999
0
1, 11
0
7
8
0
0
1
0
0
1
MC
R/L1 U
S/L2 V
T/L3 W
STF
RH
*2
RUN(BOF)
RL(BRI)
*1
(BRI)
SD SE
Generally set between 0.1 and 0.3 s.
Set the mechanical delay time until braking eases. When Pr.292 = "8",
set the value calculated by adding approx. 0.1 to 0.2 s to the
mechanical delay time until braking eases.
Turn OFF the Brake opening request (BOF) signal and set the
frequency for operating the electromagnetic brake. Generally, set the
value calculated by adding 3 to 4 Hz to the Pr.278 setting value. This
can be set only when Pr.282 ≥ Pr.278.
When Pr.292 = "7", set the value calculated by adding 0.1 s to the
mechanical delay time until the brake closes. When Pr.292 = "8", set
the value calculated by adding to approx. 0.2 to 0.3 s to the
mechanical delay time until the brake closes.
Deceleration detection function disabled
The protective function is activated when the deceleration speed of
the deceleration operation is not normal.
E.MB1 (Brake sequence fault) occurs when the difference between
the detection frequency and output frequency exceeds the setting
value under encoder feedback control.
Overspeed detection disabled
Normal operation
Operation with the shortest acceleration/deceleration time. (Refer to
page 246.)
Brake sequence mode 1
Brake sequence mode 2
Brake opening by output current
Brake opening by motor torque
Brake closing operation by frequency command
Brake closing operation by the actual motor rotation speed (estimated
value)
Mechanical
brake
Motor
24VDC
MC
*3
Brake opening request
signal (BOF)
Description
page 137 for details.)
16. (A) Application Parameters
16.1 Brake sequence function
11
12
13
14
15
16
17
18
19
20
411