376
5-32-2 MARK TRACE: MARK(174)
(174)
MARK
N
N: Mark number
#
Operand Data Area
Ladder 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 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
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 5-32
Summary of Contents for CVM1D
Page 462: ...SYSMAC CVM1D Duplex System Programmable Controllers Operation Manual Revised August 2001...
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