PROGRAMMING GUIDE
SINUS PENTA
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In case of pulled loads (e.g. lifting applications), when the motor is idling, the mechanical load could cause the motor to
run at uncontrolled speed!
If the ENABLE input is disabled when the drive is controlling the motor, it is closed with a delay time depending on the
drive size. This ENABLE delay starts from the instant when the input is disabled irrespective of the enable delay (if any)
set through a software timer in MDI2.
The operating mode and the logic used by the ENABLE input to enable/disable the drive also depends on the
programming of the DISABLE and ENABLE-SW functions described below.
If the IFD control is used, the drive enabling also depends on the START input and the current value of the active
reference: if the START command is active but the reference is lower than the preset threshold, the drive operation is
disabled. To enable this operating mode with other types of control, parameters P065 and P066 must be set
accordingly.
The drive may also be disabled by the PID regulator (see parameter P255).
DANGER!!!
The deactivation of the ENABLE-SW signal, the activation of the DISABLE signal, the
deactivation of MDI2 inputs from serial link or fieldbus DO NOT GUARANTEE
Safe Torque Off – STO function is removed from the motor connected to the drive.
Safety stop conditions are guaranteed only when at least one of the two ENABLE-A and
ENABLE-B inputs are opened.
For more details, consult the Safe Torque Off Function - Application Manual.
CAUTION
If the MDI2 inputs are disabled for one of the active terminal boards, the drive is instantly
disabled and the motor starts idling! If so, the mechanical load could cause uncontrolled
acceleration/slowing down of the connected motor!
CAUTION
If the physical ENABLE-A or ENABLE-B inputs are opened, the drive is disabled and the
motor starts idling! If this is the case, the mechanical load can ca
acceleration/slowing down of the connected motor.
CAUTION If a protection/alarm trips, the drive disables and the motor starts idling!
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