IAI America PSEL User Manual
Page 126
116
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.
(Note)
System time is counted in 32 bits, starting from time 0 which corresponds to the time the
controller is started. Accordingly, the elapsed time can be identified from the acquired time
difference, provided that it is within approx. 248 days (21474836.47 seconds) after the
controller was started and that the controller has been operating continuously since then.
[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).