Watchdog NTC to F500 PGW CAI REV0 July 2014
Current calibration value in PPM (Byte 11, 10)
These two bytes represent the current calibration speed value in Pulses Per Minute
(Default). The representation can be changed to other scaled values by using the display
scaling value below. Refer to the Watchdog manual for further details about display
scaling.
Display scaling factor (Byte 13, 12)
These two bytes contain a value which is used by the Watchdog to scale the information
on the display into a format which represents more accurately what the elevator is doing.
The default scaling factor (04B0) results in the display showing the current speed in
PPM. Refer to the Watchdog manual for further details about display scaling.
NTC Temperature 1 and 2 (Byte 15, 14)
These two bytes show the actual temperature of temperature sensors 1 & 2. The values
are in Dec C or Deg F according to the settings on the Watchdog. Refer to the Watchdog
manual NTC section for more detail.
NTC Temperature 3 and 4 (Byte 17, 16) & NTC Temperature 5 and 6 (Byte 19, 18)
See the detail above for temperature sensors 1 and 2
NTC temperature sensor status 1 and 2 (Byte 21, 20)
These two bytes show the current status of temperature sensors number 1 & 2.
If byte 21 is 0 then sensor 1 is NORMAL
If byte 21 is 1 then the temperature of sensor 1 is HIGH so an alarm has been generated.
If byte 21 is 2 then sensor 1 may be OPEN circuit
If byte 21 is 3 then sensor 1 may be SHORT circuit
NTC temperature sensors 2 to 6 operate in an identical manner as described for
sensor 1 above.
Sensor 1 and sensor 2 alarm level (Byte 27,26)
These two bytes represent the alarm value for the temperature sensor. The default values
for this alarm level are ‘9E’ (158) when measuring in Deg ‘F’ and ‘50’ (80) when
measuring in Deg ‘C’. Refer to the Watchdog manual for further detail regarding this
value.
Sensor 3 and sensor 4 alarm level (Byte 29, 28) & Sensor 5 and sensor 6 alarm level
(Byte 31, 30) operate in an identical manner as described above.
Number of sensors in use (Byte 33)
Byte 33 shows the total number of NTC temperature sensors that are currently being
monitored by the Watchdog. This value ranges from 0 to 6. See the watchdog manual
for further detail.
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