Error bits - MD30

MD30 Interface Description

Document code
M212201EN
Revision
D
Language
English (United States)
Product
MD30
Document type
User guide

Error bits indicate error situations in the unit or in communication. The erroneous bits are reported in the GET UNIT STATUS, SEND DATA, and SET REFERENCES messages.

Error is indicated by setting bit to 1.
Table 1. Error messages
Bit 1 Message Probable cause Actions
0

Surface temperature sensor error

Cables may be loose, damaged, or disconnected.

Check cables and connectors.

If the problem persists, replace mobile sensor.

1

Air temperature error

2

Relative humidity error

3

Window contamination alarm 2

Mobile sensor window is heavily contaminated. Clean the window.
4

Laser status error

- Restart mobile sensor.
5

Laser heating error

6

Excessive ambient light detected

Sunlight is reflected from road surface to mobile sensor. Move vehicle or reposition mobile sensor.
7

Receiver error

Restart mobile sensor.
8

Signal level out of range, gain adjustment limit reached

Check installation height and angle of mobile sensor.
9

Received signals contain too much noise

Check that mobile sensor is firmly attached to vehicle.
10

Optical measurement data timeout

Restart mobile sensor.
11

Low input voltage

Incorrect operating voltage. Check operating voltage.
12

High input voltage

13

Flash failure status

- Restart mobile sensor.
14

Internal temperature too high

Mobile sensor overheated. Disconnect mobile sensor from power supply.
15

Reference status:

0 = OK

1 = Invalid or not set

Verify installation with reference plate and adapt mobile sensor to road surface types.
16

Factory calibration status:

0 = OK

1 = Not calibrated

Return mobile sensor to Vaisala.
17-31

Reserved for future use

The reference setting cannot be started or is interrupted if an error is detected and indicated by bits 3 ... 14, or 16.

1 Bit is shown in MD30 interface response data message, not in RoadAI.
2 Reported by MD30 models that have the window contamination feature.