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Smart Slave Functions provide easy user maintenance through fault analysis
and prediction functions developed through years of DeviceNet experience.
Warning Torque Detection
Function
This function provides a warning when the threshold value set for the
output current (torque) during steady-state operation or during
acceleration and deceleration is exceeded.
This enables equipment maintenance to be performed before an unexpected
stoppage occurs because the increased load caused by mechanical wear
(including loose belts and chains, and friction caused by conveyor
objects) can be detected before the line stops.
Current Trace Function
This function traces the waveform of the current output to the motor and
records it as samples. The output current (torque) is recorded in a
maximum of 150 registers according to the sampling period (10 ms, 2 ms,
... 100 s). The trigger can be specified as the forward/ reverse command,
frequency agreement, error occurrence, or a manual button operation. By
selecting the proper trigger, the output current (torque) can be traced
under the desired conditions, such as prior to error occurrence. The trace
data can also be saved in CSV format for conversion to graphs and analysis
using Excel or other software.
In other words, the cause of the stoppage can be analyzed and
countermeasures taken without connecting additional measurement or
monitoring devices.
Operating Time Monitor
Function and General-purpose I/O Import Function
When the Inverter's multi- function I/O is not directly used by the
Inverter, it is possible to connect sensors or other devices and read the
status of this I/O through DeviceNet. Also, the time required from the
time a general- purpose I/O or the forward/reverse command turns ON until
a general-purpose input turns ON can be monitored and an alarm can be
output if the monitor time is exceeded.
In other words, the number of general- purpose I/O can be reduced to
eliminate the need to connect an excessive number of I/O terminals by
using the Inverter to monitor general- purpose I/O.
Remote I/O Communications
Lighten the Network
Communications Load for Multiple Inverters
If a CS/ CJ DeviceNet Unit is used as a Master on the PLC, changes in
Inverter Unit status or a multi-function input can trigger sending data to
the PLC. Using this method, a system can be built in which the
communications load on the DeviceNet network is not affected to any
meaningful degree.
Other Functions
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Cumulative ON Time Monitor Function
This function totals the ON time of Inverter general- purpose I/ O.
(Example: Operating time can be monitored by totaling the ON time of the
RUN output contact. Replacement periods for external I/ O devices can
also be monitored.)
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Contact Operations Monitor Function
This function counts the number of ON/ OFF operations of Inverter
general- purpose I/ O.
(Example: Replacement periods for external I/ O devices can be
monitored.)
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Power ON Monitor Function
This function totals the time that the power supply to the Inverter is
turned ON.
(Example: Replacement periods for cooling fans and internal electrolytic
capacitors can be monitored.)
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Average Power Monitor Function
This function monitors the power supplied by the Inverter each hour and
averages it to enable estimating consumed power.
(Example: Achievements of power saving measures can be monitored.)
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