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sband

the standby command

05mar09

The standby command brings the transmitter up in an orderly manner.

Notes:

The description below references the sband tx code in /home/phil/vw/datatk/sband/723_1may97/AO. The online routines are in 723_1may97. I've written these routines (not complete) and placed them in ./AO/. The major changes were to move all of the status variables to a structure so that it was easier to read the code.
Variables in the program are in bold italics. The St. status values have mm_nn . The mm is the byte position in the database screen where this variable appears. _nn is the bit mask for this bit.

When the operator enters stby the following occurs:

Main loop: (723.c)

dochio() eventually gets all the characters stby and returns bufRdy.
docmd() is called to process the command

standby() is called. This starts the standby processing going.

seqdecode():

Standby() requires a sequence of commands. When standby starts, the comseq variable is set to 4. Each time thru the main loop seqdecode() branches on comseq=4 to recall the standby() routine to continue the processing.

standby(): (in control9.c)

on first entry comseq <-4, trynum<-0. On succeeding calls from seqdecode(), trynum is incremented. If trynum = 6 then the standby attempt fails with COMMAND FAIL. trynum<-0, and comseq<0.
standby sequence. This is executed in order on each call to standby (first or seqdecode).

coolDwnTmr_c52=0; sets cool down timer to zero
if !st.gen.sumFlwPrf_38_20 cooling summary flow proofs missing.

cooling(1). start coolling and return to main loop.

if(!st.ttiDI.filContPrf_20_10) digital input filament contactor proof missing

This comes from the hvps building tti12 xa2 sch:190154 bit 13

The proof is a combination (and) of:

filamentCmd tto(13,11,1) sent from computer program

This is filament(1) routine to request to turn on filaments

Filament ready sch 190235 sh3 (2nd from left fiber optic input into pin 75 of chip)

comes from FO line originating in dome 190152 sh zone E3. filament ready.

(see also filament timer on previous page).

filament(1) start filament turn on. Return to main loop.

if(st.ttiDI.kly1Sel_8_1 and not st.ttiDI.kly1MagContPrf_20_20) kly1 selected and kly1 magnet contactor proof missing

magnet(1) . start kly1 magnet. return to main loop
kly1MagContPrf come from a contactor for kly1 in the hvps building:

sch:190154-sh2:p1-8 ->j1-6 |190235-sh1 chips|->j3-4->p3->10

if(st.ttiDI.kly2Sel_8_2 and not st.ttiDI.kly2MagContPrf_20_40) kly2 selected and kly2 magnet contactor proof missing

magnet(2) . start kly2 magnet. return to main loop

print STANDBY on the console..

Standby lite on the main screen.

this turns on when dome Hv Ready is true and hv OFF is true.

hot crowbar test.

respond().

The program keeps the current status, and the last one we displayed on the screen.
If the screen status has the ground switch down, and the current status has the ground switch pulled up , then ask if they want the hot crowbar test.

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