96
Motor brake and stop operation
4.9.2 Activating the electromagnetic brake (MBR signal, Pr.736)
* This parameter can be set when Pr. 160 Extended function display selection = "0."
To obtain an interlock with the electromagnetic brake operation, set a delay time between the electromagnetic brake
interlock (MBR) signal output and the actual operation start in Pr. 736 Electromagnetic brake interlock time.
The interlock time set in Pr. 736 is enabled even if the MBR signal is not assigned. Set Pr. 736 = 0 if the interlock time
setting is not required.
Additionally configure an external circuit, which can also command an emergency stop to the electromagnetic brake.
For the terminal used for MBR signal, set "21 (positive logic)" or "121 (negative logic)" in Pr.190 or Pr.192 (output terminal
function selection).
Use the electromagnetic brake interlock signal (MBR) to activate the electromagnetic brake.
Parameter
Number
Name
Initial
value
Setting range Description
736 ∗
Electromagnetic brake
interlock time
0s 0 to 1s
Set the waiting time between the initial magnetic pole
detection start and the MBR signal output at drive unit
start-up.
Set the release delay time (including relay operation
delay) of the electromagnetic brake or longer.
∗1 The release timing of the electromagnetic brake is delayed for the electromagnetic brake release time and the operation time of the relays,
etc. in external circuits.
∗2 The operation timing of the electromagnetic brake is delayed for the electromagnetic brake delay time and the operation time of the relays,
etc. in external circuits.
∗3 When the drive unit is set as Pr. 10
= "0r/min" and Pr. 11 = "0.0s", its outputs are shut off when the speed reaches 0r/min during dceleration,
and the motor starts coasting.
* During a fault occurrence, or while the MRS signal is ON.
Drive
unit
status
Output
signal
Start signal
OFF (during
a stop)
Start signal ON
DC
injection
brake
activated
Output
shutoff
∗
During a stop
(no speed
setting)
During a stop
(with a speed
setting)
Running
RY ON ON ON ON ON OFF
RUN OFF OFF OFF
ON OFF OFF
MBR OFF OFF
ON ON ON OFF
(r/min)
Reset operation
ON
ON
ON
STF
Power
supply
RH
ON
RY
RUN
ON
Initial magnetic pole detection
(approx. 100ms)
Pr.736
MBR
ON
Release delay time +
external relay, etc. ∗1
Brake delay time +
external relay, ∗2
Electromagnetic
brake interlock
(MBR)
Power supply for
electromagnetic brake
Fault output
(ALM)
Emergency stop
Rotation speed
B
Motor
Electromagnetic
brake
Time
Electromagnetic brake
operation
Operated
Operated
Open
DC injection
brake operation*3
