SPECIAL FEATURES
GEMCO DIGITAL CONVERTORS are dedicated for industrial applications
in which good static and dynamic performance and independent
controls of speed, acceleration, torque, tension etc. are essential.
Various
special features include :
- Auxillary
transducers controls, encoders, inputs, dancer arms, load
cells etc.
- Choice
of several operating & control modes.
- Automatic
management of operating sequences.
- Serial
communication with a PC or Gemco Video Keyboard.
- Serial
communication amongst various drive units for cascade /
coordinated control.
- Various
Programmable inputs and outputs :
8
Digital Inputs and 4 Analogue Inputs.
4
Digital Outputs and 2 Analogue Outputs.
- Independent
auxillary 24V DC power supply, allows use of wide range
3 phase supply, 110V-500V AC
- Speed
feedback from Armature Voltage tachogenerator or pulse encoder.
- Drive
for multiple motors Machines with internal management of
special function as:
-
Tension controls with Diameter calculation, inertia
and friction compensation etc.
-
Synchronisation of sectional Drives with Draw / Ratio
control.
PROTECTIONS
& SELF – DIAGNOSTIC
Gemco Convertors are equipped with in built protection against
various abnormalities with clear indications. Various alarm
levels programmable through serial line include :
- Wrong
sequence of three-phase line phases.
- Insufficient
three-phase line voltage.
- Excessive
three-phase line voltage.
- Phase
currents unbalancing (Fuses Failure / Current Ripples).
- Integral
current thermal motor protection (over loading).
- Minimum
field excitation current.
- External
motor protections (ventilation, thermostat).
- Excessive
converter temperature.
- Unbalancing
between reference and motor speed.
- Unbalancing
between armature voltage and speed.
- Synchronism
ramps error.
- Thyristor
firing pulses error.
- EEPROM
writing error.
- Wrong
parameters in EEPROM.
- Wrong
control circuits supplies.
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