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Auxiliary Area Appendix C
A508 A50809 Differentiate
Monitor
Completed
Flag
ON when the differentiate monitor
condition has been established dur-
ing execution of differentiation moni-
toring.
(This flag will be cleared to 0 when
differentiation monitoring starts.)
1: Monitor con-
dition estab-
lished
0: Not yet
established
Retained Cleared ---
A50811 Trace Trig-
ger Monitor
Flag
ON when a trigger condition is estab-
lished by the Trace Start Bit
(A50814). OFF when the next Data
Trace is started by the Sampling
Start bit (A50815).
1: Trigger con-
dition estab-
lished
0: Not yet
established or
not tracing
Retained Cleared ---
A50812 Trace Com-
pleted Flag
ON when sampling of a region of
trace memory has been completed
during execution of a Trace.
OFF when the next time the Sam-
pling Start Bit (A50815) is turned
from OFF to ON.
1: Trace com-
pleted
0: Not tracing
or trace in
progress
Retained Cleared ------
A50813 Trace Busy
Flag
ON when the Sampling Start Bit
(A50815) is turned from OFF to ON.
OFF when the trace is completed.
1: Trace in
progress
0: Not tracing
(not sampling)
Retained Cleared ---
A50814 Trace Start
Bit
Turn this bit from OFF to ON to
establish the trigger condition. The
offset indicated by the delay value
(positive or negative) determines
which data samples are valid.
1: Trace trigger
condition
established
0: Not estab-
lished
Retained Cleared ---
A50815 Sampling
Start Bit
When a data trace is started by turn-
ing this bit from OFF to ON from a
Programming Device, the PLC will
begin storing data in Trace Memory
by one of the three following meth-
ods:
1) Data is sampled at regular inter-
vals (10 to 2,550 ms).
2) Data is sampled when TRSM(045)
is executed in the program.
3) Data is sampled at the end of
every cycle.
The operation of A50815 can be con-
trolled only from a Programming
Device.
0 to 1: Starts
data trace
(sampling)
Turned ON
from Program-
ming Device.
Retained Cleared ---
A510 to
A511
Start-up
Time
These words contain the time at
which the power was turned ON. The
contents are updated every time that
the power is turned ON. The data is
stored in BCD.
A51000 to A51007: Second (00 to
59)
A51008 to A51015: Minute (00 to 59)
A51100 to A51107: Hour (00 to 23)
A51108 to A51115: Day of month (01
to 31)
See Function
column.
Retained See
Function
column.
Refreshed when
power is turned ON.
A512 to
A513
Power Inter-
ruption Time
These words contain the time at
which the power was interrupted.
The contents are updated every time
that the power is interrupted. The
data is stored in BCD.
A51200 to A51207: Second (00 to
59)
A51208 to A51215: Minute (00 to 59)
A51300 to A51307: Hour (00 to 23)
A51308 to A51315: Day of month (01
to 31)
(These words are not cleared at
start-up.)
See Function
column.
Retained Retained Written at power inter-
ruption
Addresses Name Function Settings Status
after
mode
change
Status at
startup
Write timing/
Related Flags,
Settings
Word Bit
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