Recommendations for FOT limit checking				MIT Dwg 36-02215
								Rev. 01		RFG	5/03/99
	Negotiations with thermal complete			Rev. 02		RFG	6/24/99
	Revisions based on a year of flight experience		Rev. 03		RFG	8/31/00
-----------------------------------------------------------------------------------------------

Paul's current prproposal is for limit exceptions on current or voltage
to only result in SOT notification -->> yellow limits; there will be
no limits which trigger immediate FOT action -->> red limits.  NB that
specifying a red limit for anything implies that we will also have to
specify what it is we want the FOT to (autonomously) do when the limit
is tripped.  If that action isn't clear, we should leave the limits yellow.

In the table below, the red thermal limits should trigger SCS 40: all
power off.  The red limits for the valve and door actuators need to
trigger the valve/mechanism disables.

Use 1DEMBVOC (has the advantage that it already exists) or one of
bits {8 13 14 25} in the PSMC Serial Digital Stream as a mode switch.
In either case the value will be "1" if and only if both DPAs are off,
which says that a "1" implies power-off/survival-thermal conditions
and a "0" implies normal operation.

It isn't obvious what will happen to 1PIN1AT, 1SSMYT, 1SSPYT, 1VAH[CO][AB]T, 
and 1WR[AB]T since they occur once /before/ 1DEMBVOC and once after.  Two 
solutions are offered here:
	-- Invent new mnemonics for the first occurance and then ignore them
	-- Treat these as "unswitched" with essentially survival limits
	   since their functions are covered by other mnemonics.

Limits and Stuff						Normal				Survival	
=====================================================	=====================================	=============================
Mnemonic	Description		LSB	Units	Nominal	RedLo	YelLo	YelHi	RedHi	RedLo	YelLo	YelHi	RedHi
--------	----------------------	------	-----	-------	-----	-----	-----	-----	-----	-----	-----	-----
 1DACTAT 	Door Angle						(none)				(none)
 1DAHACU 	Housing Heater Current	0.0200	Amps	off			0.16				0.16
 1DAHBCU* 	Housing Heater Current	0.0200	Amps	0.6		0.3	0.8				0.16
 1DAHAT		Housing Temp. Offset			off		(none)				(none)
 1DAHBT		Housing Temp. Offset			0x80		0x40	0xC0			(none)
 1DAHAVO 	Housing Htr Input Bus	0.1198	Volts	off			1				1
 1DAHBVO* 	Housing Heater Voltage	0.1198	Volts	8		 4	12				1
 1DAHHBVO* 	Housing Htr Input Bus	0.138	Volts	0			0.6			24	35
 1DAHHBVO* 	Housing Htr Input Bus	0.138	Volts	29		26	33			24	35
 1DE28[AB]VO* 	DEA Input Voltage	0.138	Volts	29		26	34			24	35
 1DEIC[AB]CU 	DEA Input Current	0.0704		noise		(none)				(none)
 1DEN0AVO* 	DEA -6VDC		0.0301	Volts	-6.38		-6.44	-6.00			-1
 1DEN0BVO* 	DEA -6VDC		0.0301	Volts	0		-0.3				-1
 1DEN1AVO* 	DEA -15VDC		0.0769	Volts	-16.3		-16.6	-14.8			-1
 1DEN1BVO* 	DEA -15VDC		0.0769	Volts	0		-0.8				-1
 1DEP0AVO* 	DEA +6VDC		0.0300	Volts	6.21		5.90	6.30				1
 1DEP0BVO* 	DEA +6VDC		0.0300	Volts	0		0.3					1
 1DEP1AVO* 	DEA +15VDC		0.0781	Volts	16.0		15.0	16.4				1
 1DEP1BVO* 	DEA +15VDC		0.0781	Volts	0		0.4					1
 1DEP2AVO* 	DEA +24VDC		0.120	Volts	25.1		24.1	25.6				1
 1DEP2BVO* 	DEA +24VDC		0.120	Volts	0		0.8					1
 1DEP3AVO* 	DEA +28VDC		0.150	Volts	30.3		29.5	31.3				1
 1DEP3BVO* 	DEA +28VDC		0.150	Volts	0		0.8					1
 1DP28[AB]VO* 	DPA Input Voltage	0.138	Volts	29		26	34			24	35
 1DPIC[AB]CU* 	DPA Input Current	0.0101	Amps	1.4		0.2	1.6				0.1
 1DPP0[AB]VO 	DPA +5VDC		0.022	Volts	5.28		5.02	5.54				1
 1HOPR[AB]PR 	Housing Pressure					(none)				(none)

 1CB[AB]T	Detector Housing	2.5	C	-60	-76	-63	-57	-52	-76	-71	-69	-52
 1CR[AB]T*	Cold Radiator		2.5	C	-128	-142	-132	-105	-90	-142	-137	-105	-90
 1DACTBT	Housing Collimator	2.5	C	-18		-21	-5			-48	-32	
 1DEAMZT*	DEA SS -Z		0.4	C	8	-37.5	2	13	40.5	-37.5	-32.5	35.5	40.5
 1DPAMYT*	DPA SS -Y		0.4	C	10	-37.5	-1	15	40.5	-37.5	-32.5	35.5	40.5
 1DPAMZT*	DPA SS -Z		0.4	C	12	-37.5	4	17	40.5	-37.5	-32.5	35.5	40.5
 1[MV]AH[OC][AB]T Actuator Temperatures	0.8	C		200				200
 1OAHAT		Door Open Actuator	2.5	C			(none)				(none)
 1OAHBT		Door Actuator Housing	2.5	C			(none)				(none)
 1PDEAAT*	PSMC DEA Board		2.5	C	25	-37	8	43	59	-37	-32	54	59
 1PDEABT*	PSMC DEA Board		2.5	C	16	-37	-3	37	59	-37	-32	54	59
 1PIN1AT*	PSMC Lid		1.3	C	14	-37	-5	27	37	-37	-32	32	37
 1SSMYT*	Support Structure -Y	0.4	C	12	-37.5	9	17	40.5	-37.5	-32.5	35.5	40.5
 1SSPYT*	Support Structure +Y	0.4	C	12	-37.5	9	15	40.5	-37.5	-32.5	35.5	40.5
 1WR[AB]T*	Warm Radiator		2.5	C	-82	-104	-86	-75	-70	-104	-99	-75	-70