11.7 – PTC temperature monitoring (PTC check: Enabled / Disabled)
The control of PTC temperature monitoring function.
Motor PTC & brake resistor thermostat can be connected to PI2 input on ENCABIT-Plus
module (usually when the inverter and the lift controller are located in separate places). In order
to enable this function, the driver must be equipped with ENCABIT-Plus module and the
connection must be made as described in the section 11.2.6.
11.8 – Over-gain detection function (S_OGD Func: Enabled / Disabled)
The control of anti-rollback over gain detection function.
This function can only be enabled when the parameter 3.5 Anti-rollback position
controller is activated.
If too high values are entered for anti-rollback position controller gains 3.6 and 3.7, the
motor can go into oscillation at startup. This case can lead noisy and instable startup. This
function is used to detect the over-gain. When an over-gain is detected, the inverter gives the
following warning:
Then the inverter stops the OGD function and drives the motor with acceleration ramp.
It is suggested to keep this function enabled.
11.10 – Trip Imax (Err_Imax: 4 - 99 A), 11.11-Trip ImaxT (Err_Imaxt: 0.1 – 9.9 s)
These parameters are used to limit the motor current. ADrive will give the “Imax_Trip
limit” error when the motor current exceeds the value set in parameter 11.10 during the period of
time set in parameter 11.11.
The device’s current limit may be harmful for the motor when the capacity of device is
larger than the motor capacity. In such cases, it will be appropriate to limit the motor current with
these parameters.
11.12 – Travel current gain (%10 - %100)
At the instant where the mechanical brake is released, the force caused by the imbalance
of the car and counter-weight is transferred instantaneously by the ropes to the rotor. At this
instant, the driver has to increase the motor current immediately to enable the rotor to stand-still
without rolling back. That’s why, PI controller gains for the motor current (11.2. KI_cur and
11.3.KP_cur) are desired to be as high as possible during startup. But adversely, keeping these
gains high during travel will cause fluctuations in motor current and will cause vibrations and
humming noises. This parameter allows reducing the gains during travel. For example, if this
parameter is set to 25%, the gains during travel will be 1/4
th
of the gains used during startup.
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