Main Bearing Deviation Alarm - Revision history

Thomas Peterson: /* Alarm Logic */

2024-06-07T15:09:09Z

Alarm Logic

← Older revision		Revision as of 15:09, 7 June 2024
Line 27:		Line 27:
	The above shows an example where main bearing 1 deviates from the average. You can graph the other main bearing inputs to see if the faulted input is trending too high or too low.		The above shows an example where main bearing 1 deviates from the average. You can graph the other main bearing inputs to see if the faulted input is trending too high or too low.

	''Note''		'''Note''': The normal thermocouple kills still apply, so a main bearing TC could fault on a normal high alarm OR a deviation alarm, assuming a high alarm is enabled.

	The normal thermocouple kills still apply, so a main bearing TC could fault on a normal high alarm OR a deviation alarm, assuming a high alarm is enabled.

Thomas Peterson: /* Alarm Logic */

2024-06-07T15:08:48Z

Alarm Logic

← Older revision		Revision as of 15:08, 7 June 2024
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	#If an input is further than the alarm threshold (above or below) the average of the rest of the main bearing temps, it will be flagged as a fault		#If an input is further than the alarm threshold (above or below) the average of the rest of the main bearing temps, it will be flagged as a fault
	##The fault is only active after the B1 timer expires		##The fault is only active after the B1 timer expires
	#~~When a~~ fault ~~is flagged~~ the ~~engine~~ is shut down		#Once the deviation fault lasts around 10 seconds the unit is shut down

	[[File:Mbdev alarm.png\|600px]]		[[File:Mbdev alarm.png\|600px]]

Thomas Peterson: /* Alarm Logic */

2024-06-07T15:08:16Z

Alarm Logic

← Older revision		Revision as of 15:08, 7 June 2024
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	==Alarm Logic==		==Alarm Logic==

	#The system will look for all temperatures matching the name "MAIN BRNG _ TEMP" or "MAIN BEARING _ TEMP"		#The system will look for all temperatures matching the name "MAIN BRNG _ TEMP" or "MAIN BEARING _ TEMP". These can be on the main module or an expansion module.
	#~~For the input~~ list ~~above~~ each input individually will have its temperature checked against the average of the others in the list.		#Using this list of main bearing inputs, each input individually will have its temperature checked against the average of the others in the list.
	#If an input is further than the alarm threshold (above or below) the average of the rest of the main bearing temps, it will be flagged as a fault		#If an input is further than the alarm threshold (above or below) the average of the rest of the main bearing temps, it will be flagged as a fault
	##The fault is only active after the B1 timer expires		##The fault is only active after the B1 timer expires

Thomas Peterson: /* Enabling the Alarm */

2024-06-07T15:07:31Z

Enabling the Alarm

← Older revision		Revision as of 15:07, 7 June 2024
Line 7:		Line 7:
	==Enabling the Alarm==		==Enabling the Alarm==

	First, the thermocouple inputs for main bearings have to be enabled. These are set up as normal thermocouple inputs and can use any normal high kill alarm, but be sure to use the built-in names "MAIN BRNG X TEMP" which is in the input name list.		First, the thermocouple inputs for main bearings have to be enabled. These are set up as normal thermocouple inputs and can use any normal high kill alarm, but be sure to use the built-in names "MAIN BRNG X TEMP" which are in the input name list.

	The alarm can be enabled under "Settings" -> "Brain" -> "Misc Settings" -> "Main bearing deviation shutdown".		The alarm can be enabled under "Settings" -> "Brain" -> "Misc Settings" -> "Main bearing deviation shutdown".

Thomas Peterson at 15:07, 7 June 2024

2024-06-07T15:07:15Z

← Older revision		Revision as of 15:07, 7 June 2024
Line 23:		Line 23:
	#When a fault is flagged the engine is shut down		#When a fault is flagged the engine is shut down

	[[File:Mbdev alarm.png]]		[[File:Mbdev alarm.png\|600px]]

	The above shows an example where main bearing 1 deviates from the average. You can graph the other main bearing inputs to see if the faulted input is trending too high or too low.		The above shows an example where main bearing 1 deviates from the average. You can graph the other main bearing inputs to see if the faulted input is trending too high or too low.

Thomas Peterson: Created page with "==Overview== The "Main Bearing Temp Deviation" is a special built-in alarm that monitors for main bearing temperatures that deviate from the rest of the main bearing temps. To use, the Brain must be updated to v3111 or higher, and the DCT must be updated to 1.65.340 or higher. ==Enabling the Alarm== First, the thermocouple inputs for main bearings have to be enabled. These are set up as normal thermocouple inputs and can use any normal high kill alarm, but be sure t..."

2024-06-07T15:06:59Z

Created page with "==Overview== The "Main Bearing Temp Deviation" is a special built-in alarm that monitors for main bearing temperatures that deviate from the rest of the main bearing temps. To use, the Brain must be updated to v3111 or higher, and the DCT must be updated to 1.65.340 or higher. ==Enabling the Alarm== First, the thermocouple inputs for main bearings have to be enabled. These are set up as normal thermocouple inputs and can use any normal high kill alarm, but be sure t..."

New page

==Overview==

The "Main Bearing Temp Deviation" is a special built-in alarm that monitors for main bearing temperatures that deviate from the rest of the main bearing temps.

To use, the Brain must be updated to v3111 or higher, and the DCT must be updated to 1.65.340 or higher.

==Enabling the Alarm==

First, the thermocouple inputs for main bearings have to be enabled. These are set up as normal thermocouple inputs and can use any normal high kill alarm, but be sure to use the built-in names "MAIN BRNG X TEMP" which is in the input name list.

The alarm can be enabled under "Settings" -> "Brain" -> "Misc Settings" -> "Main bearing deviation shutdown".

[[File:Mbdev alarmset.png|500px]]

If set to "0", the alarm will not be used. If set to some other value, the given threshold will be the degrees Fahrenheit difference for the alarm.

==Alarm Logic==

#The system will look for all temperatures matching the name "MAIN BRNG _ TEMP" or "MAIN BEARING _ TEMP"
#For the input list above each input individually will have its temperature checked against the average of the others in the list.
#If an input is further than the alarm threshold (above or below) the average of the rest of the main bearing temps, it will be flagged as a fault
##The fault is only active after the B1 timer expires
#When a fault is flagged the engine is shut down

[[File:Mbdev alarm.png]]

The above shows an example where main bearing 1 deviates from the average. You can graph the other main bearing inputs to see if the faulted input is trending too high or too low.

''Note''

The normal thermocouple kills still apply, so a main bearing TC could fault on a normal high alarm OR a deviation alarm, assuming a high alarm is enabled.