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5-33-2 MARK TRACE: MARK(174)
(174)
MARK N
N: Mark number #
Operand Data AreaLadder Symbol
Like TRSM(170), MARK(174) is used in the program to mark locations where
specified data is to be stored in Trace Memory. Two words may be designated for
tracing, and each time the MARK(174) instruction is executed, the word ad-
dress, content, and mark number are stored in Trace Memory.
MARK(174) can also be used to measure the elapsed time between the execu-
tion of two MARK(174) instructions. The Execution Time Measured Flag
(A00808) turns ON when the specified execution time has been measured. Re-
fer to the CVSS
Operation Manual: Online
for details.
The word addresses, trigger conditions, and delay must be set beforehand from
the CVSS. MARK(174) uses the control bits and flags shown in the following
table.
Flag Function
A00808 Execution Time Measured Flag
A00811 Trace Trigger Monitor Flag
A00812 Trace Completed Flag
A00813 Trace Busy Flag
A00814 Trace Start Bit
A00815 Sampling Start Bit
Sampling
Trace memory
A00812 turns ON and the
trace is complete when
enough data to fill trace
memory has been sampled.
Delay
N must be BCD.
Description
Precautions
Data Tracing Section 5-33
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