Mitsubishi Electric MR-D30 Instruction Manual page 102

4. SAFETY OBSERVATION FUNCTION
(b) Alarm occurrence
The SS1 function operates also during alarm occurrence. After the alarm occurrence, the servo
motor decelerates with the dynamic brake, electronic dynamic brake, or forced stop. Simultaneously,
the time from activation of the SS1 function is calculated, and the STO function will operate when the
time specified with [PSA03 SS1/SS2 monitoring deceleration time] has passed. For alarms which
activate the SS1 function, refer to chapter 7. For returning to normal operation, refer to section
4.5.10.
Servo motor speed
ALM
(Malfunction)
STOS
(STO output)
SS1S
(SS1 output)
(3) Stop method
(a) Category of stop method
The stop method of the servo motor is determined depending on the parameter setting or a cause of
activating the SS1 function. The following table shows stop method of the servo motor during SS1
function operation. For the operation sequence of the each stop method, refer to (b) to (d).
Servo amplifier parameter
[Pr. PA04]
[Pr. PF06]
Forced stop
Electronic dynamic
deceleration function
brake selection
selection
Automatic
Enabled
Disabled
Automatic
Disabled
Disabled
Note 1. The following shows three stop methods of DB, EDB, and SD.
DB: Stops with dynamic brake. (Coasts for the servo amplifier without dynamic brake.)
EDB: Electronic dynamic brake stop
SD: Forced stop deceleration
2. The stop method varies depending on the stop method of alarm. For the stop method of each alarm, refer to chapter 7.
0 r/min
ON (no alarm)
OFF (alarm)
ON
OFF (shut-off)
ON
OFF (shut-off)
Servo
Control mode during
amplifier
SS1 function operation
capacity
Torque control mode
600 W or less
Other than torque
control mode
Torque control mode
700 W or more
Other than torque
control mode
Torque control mode
Other than torque
control mode
600 W or less
700 W or more
4 - 31
SS1 in progress
SS1/SS2 monitoring
deceleration time
Stop method (Note 1)
Activated by alarm occurrence (Note 2)
Activated by
SS1C (SS1
method of alarm is
command)
EDB
SD
DB
SD
DB
SD
EDB
DB
DB
STO status
When the stop When the stop
method of alarm is
SS1/SD SS1/EDB
EDB EDB
SD EDB
DB DB
SD DB
DB DB
SD DB
EDB EDB
DB DB
DB DB