Alarms, Faults, Trips, And Troubleshooting; Alarms, Faults, And Trips; Viewing Trip Information - Toshiba H7 Operation Manuals

Alarms, Faults, Trips, and
Troubleshooting

Alarms, Faults, and Trips

This section lists the available user-notification codes of the EOI display and provides information that
assists the user in the event that a Fault is incurred. The user-notification codes are displayed as an
indication that a system function or system condition is active (e.g., ATN, DB/DBON, etc.). The code is
displayed on the EOI for the duration of the activation.
If a user setting or an ASD parameter has been exceeded, or if a data transfer function produces an
unexpected result, a condition that is referred to as a Fault is incurred.
An Alarm is an indication that a Fault is imminent if existing operating conditions continue unchanged.
An Alarm may be associated with an output terminal to notify the operator of the condition remotely,
close a contact, or engage a brake. At the least, an Alarm will cause a user-notification to appear on the
EOI display.
In the event that the condition that caused the Alarm does not return to its normal operating level within a
specified time, the ASD Faults and a Trip is incurred. A Trip is a safety feature that disables the ASD
system in the event that a subsystem of the ASD is malfunctioning, or one or more of the variables listed
below exceeds its normal range (time and/or magnitude).
• Current,
• Voltage,
• Speed,
• Temperature,
• Torque, or
• Load.
The operating conditions at the time of the trip may be used to help determine the cause of the trip. Listed
below are operating conditions that may be used to assist the operator in correcting the problem or that the
ASD operator should be prepared to discuss when contacting Toshiba's Customer Support for assistance.
• What is the ASD/Motor size?
• Is this a new installation?
• Has the system ever worked properly and what are the recent modifications?
• Does the ASD trip when accelerating, running, decelerating, or when not running?
• Does the ASD reach the commanded frequency?
• Does the ASD trip without the motor attached?
• Does ASD trip with an unloaded motor?

Viewing Trip Information

When a trip occurs, error information may be viewed either from the
Monitor Setup ⇒
Trip Monitor From ASD), or from the Monitor screen.
Trip History
The Trip History screen records the at-trip system parameters for up to 101 trips (RTC option required).
The recorded trips are numbered from zero to 100. Once the Trip History record reaches trip number 100,
H7 ASD Operation Manual
Trip History), the Trip Monitor From ASD
Trip History screen (Program
screen (Program ⇒ Monitor Setup
⇒
⇒
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