Mitsubishi Electric 800 Series Instruction Manual page 322

Pr. Name
281
Brake operation time at start
A103
282
Brake operation frequency
A104
283
Brake operation time at stop
A105
292 Automatic acceleration/
F500 deceleration
639 Brake opening current
A108 selection
640 Brake operation frequency
A109 selection
 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).
• Set "15" in any parameter from Pr.178 to Pr.189 (Input terminal function selection), and assign the Brake opening
completion (BRI) signal to the input terminal.
• Set "20" (positive logic) or "120" (negative logic) in any parameter from Pr.190 to Pr.196 (Output terminal function
selection), and assign the brake opening request signal (BOF) to the output terminal.
• Use Pr.639 Brake opening current selection to select whether the output current or the motor torque is used as a
reference for the brake opening operation.
Initial Setting
value range
0.3 s 0 to 5 s
6 Hz 0 to 30 Hz
0.3 s 0 to 5 s
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
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.
Normal operation
Operation with the shortest acceleration/deceleration time. (Refer to
page 171.)
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
14. (A) Application Parameters
14.1 Brake sequence function
11
12
13
14
15
16
17
18
19
20
321