A-117
Appendices
CJ2 CPU Unit Software User’s Manual
A-3 Auxiliary Area
App
A-3-1 Read-only Area (Set by System)
A274 A274.00 High-speed
Counter 0 Range
Comparison
Condition 1 In-
range Flag
These flags indicate whether the PV is within any of the eight
ranges when high-speed counter 0 is being operated in range-
comparison mode with upper and lower limits. The In-range
Flags, however, will be ON whenever the comparison value is
within the range regardless of the whether the high-speed counter
is set to execute the interrupt task when the range is entered or
left.
OFF: Not in range, ON: In range
Cleared Cleared • Refreshed each
cycle during over-
seeing process.
• Refreshed when
PRV(881) instruc-
tion is executed to
read the results of
range compari-
son.
• Refreshed when
INI(880) instruc-
tion is executed to
change PV or ring
counter maxi-
mum value.
• Refreshed when
reset.
A274.01 High-speed
Counter 0 Range
Comparison
Condition 2 In-
range Flag
A274.02 High-speed
Counter 0 Range
Comparison
Condition 3 In-
range Flag
A274.03 High-speed
Counter 0 Range
Comparison
Condition 4 In-
range Flag
A274.04 High-speed
Counter 0 Range
Comparison
Condition 5 In-
range Flag
A274.05 High-speed
Counter 0 Range
Comparison
Condition 6 In-
range Flag
A274.06 High-speed
Counter 0 Range
Comparison
Condition 7 In-
range Flag
A274.07 High-speed
Counter 0 Range
Comparison
Condition 8 In-
range Flag
A274.08 High-speed
Counter 0 Com-
parison Opera-
tion
This flag indicates whether a comparison operation is being exe-
cuted for high-speed counter 0.
OFF: Stopped, ON: Comparing
Cleared Cleared Refreshed when
comparison opera-
tion starts or stops.
A274.09 High-speed
Counter 0 Over-
flow/Underflow
Flag
This flag indicates when an overflow or underflow has occurred in
the PV of high-speed counter 0. (Used with the linear mode
counting range only.)
OFF: Normal, ON: Error
Cleared Cleared • Cleared when the
PV is changed.
• Refreshed when
an overflow or
underflow occurs.
A274.10 High-speed
Counter 0 Count
Direction
This flag indicates whether the high-speed counter is currently
being incremented or decremented. The counter PV for the cur-
rent cycle is compared with the PV in last cycle to determine the
direction.
OFF: Decrementing, ON: Incrementing
--- --- • Setting used for
high-speed
counter, valid dur-
ing counter oper-
ation.
• Refreshed each
cycle during over-
seeing process.
• Refreshed when
PRV(881) instruc-
tion is executed to
read the PV or
status.
Address
Name Function
Status
after mode
change
Status at
startup
Write timing/
Related flags, set-
tings
Words Bits
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