Omron 3G3MV-PDRT2, Руководство пользователя

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Chapter 1
1-5
Functions and System Configuration
1-2 Overview of Smart Slave Functions
As a Smart Slave, the DeviceNet Communications Unit/Card (3G3MV-PDRT2 or 3G3RV-PDRT2) is
equipped with new Smart Slave functions. This chapter introduces the Smart Slave functions. Refer
to
7-2 Smart Slave Functions for more details and setting/monitoring procedures.
■
Average Power Monitor Function
This function monitors the power that the Inverter supplies each hour and determines the cumulative
power usage from the hourly average. The amount of power used by the system can be obtained
without using special sensors or performing any calculations. In addition, monitoring the power
usage can help reduce energy usage and identify power consumption problems in the system.
The average power can be easily monitored from a Configurator, Programmable Terminal (NS
Series), or other operator interface.
■ Warning Torque Detection Function
This function can detect equipment errors by monitoring the output current.
Problems in the load can be detected in the Inverter’s current (torque) level. The function provides
advanced warning of an increased load caused by deterioration in the mechanical system (such as a
loose chain, low bearing oil, or worn-out equipment), so preventative maintenance can be per-
formed.
Note This function generates a warning (alarm), so operation will continue.
■
Current Trace Function
This function traces (samples and records) the output current waveform to the motor. Troubleshoot-
ing can be performed easily, without connecting measuring equipment. The Configurator can be
used to set the current trace’s trigger setting, set the sampling cycle, and display the current wave-
form.
■
Operating Time Monitor Function
This function can perform a high-speed calculation in the Slave (independent of the ladder program)
to determine the time required for an input to go ON after a particular signal or reference goes ON.
The Slave can report (through the Unit status flags) when the operating time exceeds the SV set in
the Slave.
■ Cumulative ON Time Monitor Function
This function totals the time that one of the Inverter’s control I/O terminals is ON. For example, if the
RUN output’s ON time is totaled, it is possible to calculate the Inverter’s operating time and monitor
equipment operating time without using the ladder program.