Mark Trace: Mark(174) - Omron CVM1D Operation Manual

Data Tracing

5-32-2 MARK TRACE: MARK(174)

Ladder Symbol
Description
Precautions
376
Operand Data Area
(174)
N: Mark number
MARK N
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 SSS Operation Manuals for details.
The word addresses, trigger conditions, and delay must be set beforehand from
the SSS. MARK(174) uses the control bits and flags shown in the following table.
Flag
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
Delay
Sampling
Trace memory
N must be BCD.
#
Function
A00812 turns ON and the
trace is complete when
enough data to fill trace
memory has been sampled.
Section 5-32