Ifm-electronic JN2301 Manuel d'utilisateur télécharger pdf (Page 18)

Inclination sensor JN

10.6 Quadrant correction (0x2040)

Quadrant correction means for JN2301 only an extension of the lateral Euler

angle to the measuring ranges ± 180° (corresponds to 2040h = 1) or 0��360°

(corresponds to 2040h = 2)�

10.7 Heating (0x2041h)

To ensure good temperature stability over the whole temperature range, the

measuring cell is regulated to a constant temperature using a PID controller� The

regulation of the heating is set by the factory and can be deactivated by writing the

value 0 to the parameter of the heating (index 2041h)�

This has the following effects:

> Reduction of temperature stability

> Current consumption decreases when operating

> Accuracies deviate from the indications in the data sheet

10.8 MEMS measuring cell temperature (0x2081)

The temperature of the measuring cell is determined every 200 ms and updated

in the protocol at "informative"� It can be read via access to the index 2081h� The

signed 16-bit value indicates the temperature in 1/10°C�

10.9 MEMS self-test (0x4008 / 0x4009)

To check the function of the measurement axes a self-test of the measuring cell

can be carried out�

The MEMS self-test (index 4008/01h) has to be activated by writing the value

1� The self-test takes about 2 s; when the self-test has ended, the flag (index

4008/01h) is reset to 0� The test result is coded in a byte and can be read from the

self-test register (index 4009h)�

00000111 of the 3 least significant bits code the internal X, Y, Z measurement axes

Bit 0: axis faulty / bit 1: axis functional

10.10 Programming key (0x3000)

The sensor can convert the parameter setting unambiguously into a Base64-coded

key�

By means of this key sensors with the same parameter setting can be duplicated

in an easy way�

The programming key can be read from and written to index 3000h� To ensure

that only valid keys are accepted by the firmware a 2-byte checksum (CRC) is

calculated and added to the end of the key�

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Ifm-electronic JN2301 Manuel d'utilisateur Page 18