Type 8312

7 | 11

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4.

Product operation

4.1. Functional overview

Pressure P

A/D

Device functions

(Profile DS 404)

EMERGENCY

PDO

HEARTBEAT

1

Calibration

2

Sensor monitoring

3

Scaling

4

Fine adjustment

5

Filter

6

Decimal places

7

Measuring

range monitoring

8

Drag pointer

(min./max.)

9

Date/Name

10

11

Probe break/

Probe short-circuit

Measured value, 32 bit

Status, 8 bit

Parameters

Measurements

Status

12

SDO

13

14

NODE GUARDING

14

SYNC

NMT

LSS

15

16

17

No. Description

1

The analog signal from the pressure cell is digitized with 12 Bit resolution.

2

The pressure signal is digitally calibrated at the factory.

3

The sensor monitoring facility continuously checks the correct performance of the sensor signal and triggers high priority

emergency telegrams in the event of an error.

4

The pressure measurement can be scaled to any dimensional unit (or in % of range).

5

Fine calibration features and auto-zeroing function and a freely adjustable shift of the characteristic.

6

Undesirable signal fluctuations can be suppressed through the constant (adjustable) filter.

7

The measurement output has a freely selectable decimal place.

8

Free choice of upper and lower limits for range monitoring. The result is given as a status byte in addition to the measurement

in the PDO frame.

9

The drag pointer (“min./max. index”) function records the minimum and maximum pressure values.

10 Date and name of the last servicing action can be stored.

11 An emergency telegram is triggered in the event of a sensor fault.

12 The PDO frame contains a 32-bit measurement and a 8-bit status. The measurement output can be controlled by means of

different trigger conditions.

13 Parameters can be set through SDO frames, and measurements and status can be requested.

14 The heartbeat signal or Node Guarding can be used to additionally monitor the transmitter function.

15 The transmission of measurements can be controlled through the Sync command.

16 NMT frames serve to control the operational state of the transmitter.

17 The CAN Node ID and CAN baud rate are set via LSS or SDO, according to choice.