Siemens Midimaster Eco - Expert; Advanced Parameter Settings; Protection Functions and Features

ECO REFERENCE MANUAL
16-6
6. Expert / Advanced Parameter Settings
The VSD shall have at least the following
adjustable settings easily accessible within the
Expert Mode of set-up and operation;
• Motor current limit: 0-250%
• Starting voltage/torque boost: 0-200%
• Switching frequency for acoustic noise control:
2-16 kHz
(higher kW rated VSD may have limited max.
switching freq.)
• (4) Skip frequencies with adjustable band
width to prevent mechanical resonance.
• Energy Control Optimisation or Multi-Motor
mode selection.
• DC injection braking intensity.
• Compound braking.
• (8) programmable fixed frequencies.
• Direct serial communication monitoring of
digital input status and direct control of digital
relay outputs and analogue outputs.
• Adjustable display scaling factor for display of
temperature and pressure.
7. Protection Functions and Features
The VSD shall include the following protective
features in order to ensure the security and safe
operation of the equipment:
• Line to line and line to ground instantaneous
short circuit over-current
• Over-voltage
• Under-voltage
• VSD overload
• VSD over-current
• RAM/EPROM/EPROM malfunction
• Serial communication time out
• Digital input external fault
• VSD power stage over-temperature
• Motor I2t overload protection
• Motor PTC input facility for motor winding
temperature monitoring
• Memory register for storage of the last four
fault codes
• Memory register for storage of the last
warning event
The VSD shall have at least the following
additional features:
• Ability to disable panel buttons whilst in
remote control mode
• Parameter protection with 2 levels of setting
• Automatic restart after a fault, etc.
• Expansion to serial communication network
using RS485 and simple protocol (USS).
• Closed loop internal PID control for pressure
and temperature regulation.
Setpoint may be from an analogue, digital or
serial input.
Feedback may be either 0-10V or 0/4-20mA.
A 15Vdc power supply shall be provided for a
transducer.
• Ability to reset to factory default settings.
• Ability to have selection between MANUAL
and AUTO through use of selector via VSD
digital input terminals.
• Ability to provide optional AC line reactors for
power factor improvement, harmonic control,
prevention of zero voltage notching or surge
protection from low impedance supplies.
• Factory default parameter settings. Automatic
selection of either European or North
American defaults.