Campbell CS475 Instrukcja Użytkownika Pobierz pdf (Strona 33)

User Manual

The verification values that will be returned are:

• CRC check (error check)—values are 0 (OK) or 1 (failed)

• SDI-12 Radar firmware version number

• HART Sensor firmware version

Table 8-4 shows an example of checking the CRC.

Table 8-4. Checking CRC Example

Initial Command Response

0V!

Where 0 is the sensor’s address.

00013<cr><If>

Where (from left to right),

0—sensor’s address;

001—the amount of time (in seconds) that

you must wait before sending the send data

command;

3—the number of values that will be

placed in the buffer.

Subsequent Command Response

0D0!

Where the first zero is the

sensor’s address.

0+0+1610000+3320000<cr><If>

Where (from left to right),

0—sensor’s address;

0—CRC check (0 = OK);

1610000—adapter version (1.61.00.00);

3320000—sensor version (3.32.00.00).

8.1.5 Get Units

Use the aXGU! command to get the current units setting of the sensor. If the units

are feet, a 1 will be returned, and if the units are metres, a 0 will be returned.

8.1.6 Get Water Conditions

The aXGWC! command returns the current setting of the water conditions.

Possible water conditions are:

1 = smooth (default)

2 = medium

3 = rough

0 = undefined (custom settings)

8.1.7 Get Power Operation Mode

The 0XGPOM! command provides the current power operation mode setting of the

sensor.

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Campbell CS475 Instrukcja Użytkownika Strona 33