ElmoMC SimplIQ Software Manual - Manual (Page 29)

SimplIQ Software Manual The Interpreter Language
MAN-SIMSW (Ver. 1.4)
4-11
4.2.6.5 Time Functions
The TM command is used to read the system 32-bit microsecond counter. The time
difference from the present time to an older sampling of TM can be determined using
two methods, as in the following examples:
ƒ QP[1] = TM ; ** QP[1] is used just as storage
….** Do something
QP[2] = TM -QP[1]; ** QP[2] is time difference in microseconds
ƒ QP[1] = TM ; ** QP[1] is used just as storage
….** Do something
QP[2] = tdif( QP[1]) ; ** QP[2] is time difference in milliseconds
Time differences can be no longer than 31 minutes. To pause for a given time in a user
program, use the Wait function (
section 5.7.5 ).
In a CAN network, the time counter can be changed by the CAN network master,
in which case, the tdif(x) function may return a value different than the time
elapsed since X=TM was sampled.
To prevent an external event from affecting the timer, use the tick function. The time
difference between the present time and an older tick sampling can be determined by one
of two methods, as shown in the following examples:
ƒ
Example 1:
QP[1] = tick(0) ; ** QP[1] is used as storage only
. . . **Do something
QP[2] = QP[1]-tick(0); **QP[2] is the time difference in microseconds
ƒ Example 2:
QP[1] = tick(1000) ; ** QP[1] is used as storage only
. . . **Do something
QP[2] = tock(QP[1]); **QP[2] is the time difference in milliseconds
The tick( ) and tock ( ) functions cannot measure time differences greater than
32 milliseconds.
4.2.6.6 User Function Calls
The XQ command enables a user function call (see Chapter 6: ). A user function cannot be
called from the command line without the XQ command.
4.2.7 Comments
Comments are texts written into the code to enhance its readability. A comment starts
with a double asterisk (**) and terminates at the next end of line. The drive ignores
comments when evaluating an expression. The Interpreter handles comments from the
user program only.