About limit detectors – MTS Series 793 User Manual

Page 285

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Action

Setting

Stops any program command, writes a message to the Message Log, and
switches the indicator from green to red. Produces the same action as clicking
the Program Stop button on the Station Controls panel.

Program Stop Interlock

Note:

A Program Stop Interlock must be reset to resume testing.

Places a hold on any program command, writes a message to the Message
Log, and switches the indicator from green to red. Produces the same action
as clicking the Program Hold button on the Station Controls panel.

Program Hold Interlock

Note:

A Program Hold Interlock must be reset to resume testing.

Note:

The Function Generator does not recognize Program Hold or Program
Hold Interlock, but instead goes to Stop.

Executes a user-defined action created in the Event-Action Editor window and
switches the indicator from green to red.

Custom Actions

About Limit Detectors

Limit detectors monitor sensor feedback signals. If the sensor signal exceeds user-defined limits, the controller
can trigger a detector action. The adjustment range equals 130% of the selected range’s full scale.

Actions

Standard detector actions include: Station Power Off, Interlock, Program Interlock, Program Stop, Program
Hold, or Custom Actions.

Example

The following figure shows how a limit detector can automatically stop a test. Here the limits have been set
to remove station power when the displacement feedback reaches either +1.1 cm or -1.1 cm. When the
specimen breaks, the +1.1 cm upper limit is reached. The limit detector then trips, stops the test, and removes
station power.

MTS Series 793 Control Software 285

Station Setup

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