Specifications

ST900 Family General Handbook
667/HB/32900/000 Issue 11 Page 167 of 265
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2
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0
S
S
E
E
L
L
E
E
C
C
T
T
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E
D
D
F
F
I
I
X
X
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E
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D
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T
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I
M
M
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,
,
C
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F
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O
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R
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V
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A
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M
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O
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Manually selected ‘FT’, ‘CLF’ and ‘VA’ are selected by mode select buttons ‘FIXED
TIME’, ‘CLF’ and ‘V.A.’. The modes selected are recognised as modes for priority
purposes.
The respective mode will only become operative if SELECTED FIXED TIME, CLF or
VA mode is a higher priority than the current mode.
These mode select buttons may be used to force the controller to work in VA, CLF
or FT mode rather than in a mode that would normally be higher in priority than VA,
CLF or FT such as UTC or Priority for example. Because VA or FT is usually
configured as the lowest priority mode, SELECTED VA/FT/CLF is treated as a
separate mode, and can be configured higher up in the mode priority table.
(N.B. Priority demands and associated VA demands are latched and will affect the
operation if VA is selected. However Priority mode will not become operative and
Priority maximums will not take effect.)