Campbell Scientific 0871LH1 0871LH1 Freezing Rain Sensor - Page 24

9 Ice Detector RS-422 String Format Byte 0 (First) 1 -2 MSO FREQUENCY 3 - ERRSTAT1 4 - ERRSTAT2 Bit 7 (MSB) 6 5 - 3 2 1 0 7 6 5 4 3 2 1 0 7 - 6 5 4 3 2 1 0 Table 8. Serial String Format Definition String ID Comments/Interpretation/Range Presently defined as 00 May add additional strings in future Unused Probe Heater State 1- Heater On Ice Output 0- Heater Off 1- Ice 0- No Ice Status Output 1- Fail 0- (OK) No Fail MSO Count in Hex Unused Frequency = 774060000/Dec (MSO) 1 = Active MSA Fail, Too High MSO Fail, Too Low EEPROM Fail RAM Fail ROM Fail Watchdog Fail Power Interrupt Timer Fail Probe Heater Failure 00 = Probe Heater OK 01 = Probe Heater Always ON or OPEN 10 = Probe Heater Always OFF De-Icing Fail 11 = Probe Heater ON with 1 Enable 1 = Active Unused Unused Unused Unused Unused