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3.4.1 Automatic sensor identification (burster TEDS)
DIGIFORCE
®
9311 uses the burster TEDS (Transducer Electronic Data Sheet) to provide automatic
sensor recognition, i.e. the instrument reads the relevant sensor specification from an EEPROM, fitted in
the sensor plug, and can then use this data to perform the necessary channel configuration automatically.
The memory chip in the sensor plug is programmed when the sensor is first ordered or subsequently
calibrated. The burster TEDS feature is only available for sensors with a permanently fitted connecting
lead.
Diagram 3: burster TEDS label
3.5 Recording measurement curves
An external control signal or an internal condition triggers the measurement. On receiving this active start
condition, the DIGIFORCE
®
9311 immediately starts writing the values measured by the sensors as X/Y
value pairs to the measured-value memory. The DIGIFORCE
®
9311 stops the measurement again when
a stop condition is met.
Then the DIGIFORCE
®
9311 immediately evaluates the recorded measurement curve. In this evaluation,
the DIGIFORCE
®
9311 checks whether the measurement curve satisfies all the defined graphical
evaluation elements. If so, the measurement is assessed to be OK. If, however, there is at least one
infringement, the DIGIFORCE
®
9311 gives the measurement an NOK evaluation.
As soon as it has completed the evaluation, the DIGIFORCE
®
9311 refreshes the measurement mode
display and updates the control signals at the PLC interface.
3.5.1 Starting / stopping a measurement
You can use various events as the start signal and stop signal, which can be mutually independent.
Starting a measurement
•
External control signal.
•
Measured value goes above or below a defined X-value (e.g. a displacement value).
•
Measured value goes above or below a defined Y-value (e.g. a force value) (not for
piezoelectric sensors).
Stopping a measurement
•
External control signal.
•
Measured value goes above or below a defined X-value (e.g. a displacement value).
•
Measured value goes above or below a defined Y-value (e.g. a force value).
•
Time (timeout).
•
Configurable number of recorded measured values reached.
Summary of Contents for DIGIFORCE 9311
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