Campbell-scientific 0871LH1 Freezing Rain Sensor Manual de usuario descargar pdf (Pagina 24)

9 Ice Detector RS-422 String Format

Table 8. Serial String Format

Byte Bit Definition Comments/Interpretation/Range

0 (First) 7 (MSB)

String ID Presently defined as 00

May add additional strings in future

5 - 3 Unused

Probe Heater State

1- Heater On

0- Heater Off

Ice Output

1- Ice

0- No Ice

0 Status Output 1- Fail

0- (OK) No Fail

1 -2 MSO FREQUENCY MSO Count in Hex Frequency = 774060000/Dec (MSO)

3 - ERRSTAT1 7 Unused

1 = Active

6 MSA Fail, Too High

5 MSO Fail, Too Low

4 EEPROM Fail

3 RAM Fail

2 ROM Fail

1 Watchdog Fail

0 Power Interrupt Timer Fail

4 - ERRSTAT2 7 - 6

Probe Heater Failure

00 = Probe Heater OK

01 = Probe Heater Always ON or OPEN

10 = Probe Heater Always OFF

11 = Probe Heater ON with 1 Enable

5 De-Icing Fail

1 = Active

4 Unused

3 Unused

2 Unused

1 Unused

0 Unused

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 30 31

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Campbell-scientific 0871LH1 Freezing Rain Sensor Manual de usuario Pagina 24