Under Voltage Handling - JVL MIS17 Series User Manual

5.10

Under voltage Handling

The MIS motors offer the possibility to define the behaviour during and after the P+ bus
voltage (main supply) disappear. This situation could for example be during an emergen-
cy stop, which causes the P+ supply to be cut while the control voltage (CVI) is still ap-
plied to the motor.
3 options available:
Under voltage -> Set error bit
Default = ON.
If this option is selected an under voltage will be handled like an error situation and the
corresponding error bit will be set. The motor is stopped using the "Error deceleration'
before the motor is switched to Passive mode, like any other error situation. When P+
is re-applied to the motor it will stay in Passive mode and report a "Low bus voltage"
error. To get the motor back in normal operation the error must be cleared and an op-
eration mode must be selected. If this function is activated it will have first priority and
the "Error deceleration" will be used compared to the 2 other options "Under voltage -
> Stop controlled and go to passive" and "Under voltage -> Set velocity to 0" which
both use normal deceleration.
Under voltage -> Stop controlled and go to passive
Default = Off.
This option makes the motor decelerating according to the normal acceleration param-
eter and go to Passive mode when P+ is removed. When P+ is re-applied the motor
stays in Passive mode. To get the motor back in normal operation an operation mode
must be selected.
Under voltage -> Set velocity to 0
Default = Off.
This option simply just sets the velocity to 0 causing the motor to decelerate and stay
stationary when P+ is removed. The velocity setting will stay at 0 also after P+ is re-
applied. A velocity value (>0 RPM) must be written into the velocity register to get the
motor moving again.
Continued next page
JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS17x, 23x, 34x, 43x 133