Lenze 9400 Manuale Utente Scaricare il pdf (Pagina 580)

12 Oscilloscope

12.2 Functional description

580

Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06

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12.2 Functional description

With an online connection to the controller, use the oscilloscope user interface of »Engineer« to set

the trigger condition and the sample rate and select the variables to be recorded.

When the measurement is started, the set parameters are transferred to the controller and checked.

If invalid settings are found, the oscilloscope sends an error. Otherwise, the measurement is started.

With an online connection, the measured controller data are transferred to »Engineer« and

graphically represented on the oscilloscope user interface as soon as the measurement has been

completed.

Recording variable values

The operating system scans the oscilloscope in fixed 1 ms-cycles, i.e. the oscilloscope can record

variable values with a sample rate of max. 1 kHz.

Recording system variable values of the internal motor control

Unlike the variables declared in the application, the system variables of the internal motor control

(MCTRL) can also be recorded with a sample rate higher than 1 kHz.

Recording I/O variable values referring to a task

When selecting the variables to be measured, it is possible to indicate a task reference for the

variables. If the behaviour of a certain task is to be examined, you can indicate the task reference to

exactly record the values valid for the task run-time. The variable values are recorded during the

process output mapping of the task.

 Note!

In the servo operating modes, recordings with a time-based resolution of 31.25 μs and

125 μs are not possible!

In comparison to all other variable values, the system variables of the internal motor

control have a cycle offset of 2 ... 3 ms!

If recordings with sampling frequencies of > 1 kHz are carried out, up to a maximum of

three measured values will be missing at the left and right edges of the oscilloscope

screen. This is only noticeable in the case of very small time deviations

≤ 1ms/div.

Because of the nature of the system, the absence of the measured values is due to

oversampling.

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