120
Part 2 Programs
GTTM (Get time)
Command, declaration
Extension condition
(LD, A, O, AB, OB)
Input condition
(I/O, flag)
Command,
declaration
Operand 1 Operand 2
Output
(Output, flag)
Optional Optional GTTM
Variable
number
Prohibited CP
[Function] Read system time to the variable specified in operand 1. The time is specified in units of 10
milliseconds.
The time obtained here has no base number. Therefore, this command is called twice and
the difference will be used to calculate the elapsed time.
[Example 1] GTTM 1 Read the reference time to variable 1.
ADD 1 500 Set the ending time to 5 seconds later.
GTTM 2 Read the current system time to variable 2.
DWLE 2 *1 Proceed to the step next to EDDO when 5 seconds elapsed.
: The above process will be repeated for 5 seconds.
:
GTTM 2 Read the current system time to variable 2.
EDDO
[Example 2] LET 1 5 Assign 5 to variable 1.
GTTM *1 Store the current system time in the content of variable 1
(variable 5).
(Note) System time is counted in 32 bits from 0 representing the time the controller is started.
In other words, elapsed continuous operation time between two points in time can be
checked by obtaining the difference in system time between the two points, provided that
both points in time occur within approx. 248 days (21474836.47 seconds) after the controller
was started.
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