Docu-No.: 0590020601-EN Rev. 1.6.0 Page 45
Programming Reference 1
Machine setup menu 1.7
1.7.12 Performance sub-menu
Depending upon drive type, certain parameters will not be displayed.
Parameter
Definition
CONTROL-%
Control-%
This parameter is a quality indicator of loss-in-weight feeding
performance. This value uses the same technique like the pert value
calculation in relation to the setpoint where 100% means no noise,
0% means too much noise. If the controller is in volumetric or pert,
the value is slowly decreased.
A value > 80% means usually a good performance.
GRAV RATIO-%
Gravimetric Ratio-%
The time ratio the machine runs in gravimetric mode and has no pert
disturbance. The value is filtered with a time constant of 15 minutes.
A value of 100% means the feeder is always in gravimetric mode and
shows no Pert disturbance while 0% means the feeder is never in
Gravimetric mode.
INT CHANNEL-%
Internal Channel-%
The internal channel performance is calculated in two parts, the
bandwidth load and the error counter where it considers 10 errors
per minute as bad and 100% load as bad. Both values are taken in
square as follows:
IntChanPrf% = 100 * 1 - [(Load² + (0.1*Err/min)²) /2]
Example: 5 errors/min and 50% load = 75% performance.
Expect normal values of 75% to 99%.
KCM TEMP [deg C]
KCM Temperature
Displays the actual temperature in the KCM in °C.
Input range: Display only.
TORQUE-%
Only for DC motor and stepper
motor drives
Torque-%
The motor torque is derived from the power indication according to
the following formula:
Torque = 100*(actual power * nominal speed) / (nominal power *
actual speed).
Notes:
• On low speeds, this indication might be inaccurate.
• 100% torque is the maximum allowed.
• Not for vibratory feeders or for AC Drive Interface.
• At low speeds, torque will reach a maximum of 100% before
<Actual Power> reaches <Maximum Motor Power>. At high
speeds, the opposite will occur.
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