ABB TB82PH Betriebsanleitung PDF herunterladen (Seite 46)

I-E67-TB82FF-2A February 13, 2002

Sensor Group Variable Resistance

(ohm)

Desired Display Value Actual Display Value

Open

0.000 µS/cm

100,000

0.050 µS/cm

50,000

0.100 µS/cm

5,000

1.000 µS/cm

1,000

5.00 µS/cm

500

10.00 µS/cm

100

50.0 µS/cm

100.0 µS/cm

DIAGNOSTIC INFORMATION RECEIVED FROM THE FIELDBUS

Dynamic variables and diagnostic information are continually passed onto the fieldbus during each device

transmission. Most engineering tools and/or system/host workstations provide the ability to view such information.

Dynamic variable status contains two components: data quality and sub-status. The following table briefly outlines

the dynamic variable status.

Quality Sub-status

Good (non-cascade) 1) Nonspecific.

2) Active alarm block.

3) Block has active advisory alarm.

4) Block has active alarm with priority > or = 8.

5) Block has unacknowledged alarm.

6) Unacknowledged advisory alarm.

7) Unacknowledged critical alarm.

Uncertain 1) Nonspecific.

2) Last usable value.

3) Substitute.

4) Initial value.

5) Sensor conversion not accurate.

6) EU range violation.

7) Sub-normal.

Bad 1) Nonspecific.

2) Configuration error.

3) Not connected.

4) Device failure.

5) Sensor failure.

6) No communication, with last usable value.

7) No communication, with no last usable value.

8) Block Out of Service.

Note.

1. The transmitter calibration values must be set back to factory values in order for the sensor simulation

procedure to be valid.

2. Lead wire and contact resistance becomes a significant part of simulated conductivity for simulated resistance

values less than 10 ohms. Measure all resistances going to the transmitter to ensure accurate results.

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