XGS-600 Gauge Controller
78
DRAFT 4/
15/14
This means that if a Multigauge had a UHV card installed in MG slot # 3, the HFIG card
would have to be installed in XGS600 slot #2 for its BCD address to also be 3.
C.1.2 Emulation of MG 4 Channel TC CARD
Since XGS-600 does not have a 4-channel TC card, backwards compatibility requires some
way to emulate the 4-channel card. This is accomplished by installing two convection cards
in physically adjacent slots. Doing this allows the second card to be addressed as the third
and fourth channels of the first card and causes the Read Contents command to report the
two cards as a 4-channel TC card installed in the lower numbered slot.
Example1: Convection cards are installed in slot #'s 5 and 6.
a. Read Contents command reports 40h for slot #5 (BCD addr 1).
b. The card installed in slot 5 is addressed as BCD addrs 11 + 12. The card in slot 6
is addressed as BCD addrs 13 and 14.
Example 2: Convection cards are installed in slots 5 and 1.
a. The Read Contents command reports the cards as 48H at BCD addresses 1 and 2.
b. The card installed in slot #5 is addressed as 11 + 12. The card in slot #1 is
addressed as 21 and 22. This maintains compatibility with MG using two
convector cards.
C.1.3 Pressure Information
Pressure information is transmitted in the format of x.xxxExx and requires three bytes. The
first two are the mantissa and the third is the exponent in two's complement notation.
For example:
7.600 E+2 --- {76h} {00h} {02h}
2.145E-7 --- {21h} {45h} {F9h}
OFF ---- {00h} {00h} {00h}
Error codes are transmitted in MG/Sentorr format.
For example:
NO FIL1 is reported as E05 ---- {0Eh} {00h} {05h}
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Table C-1 Card Information Byte Mapping (Continued)
XGS-600 Slot # BCD base Address
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