11.4 SVCREQ 2: Read Window Times
SVCREQ 2 can be used to read the times of the programmer communications window
and the system communications window. These windows can operate in Limited or Run
to Completion Mode.
Mode Name Value
Description
Limited Mode 0
The execution time of the window is limited to 6ms. The
window terminates when it has no more tasks to
complete or after 6ms elapses.
Run to
Completion Mode
2
Regardless of the time assigned to a window, it runs
until all tasks within that window are completed (up to
400ms).
A window is disabled when the time value is zero.
11.4.1 Output Parameter Block for SVCREQ 2
The parameter block has a length of three words:
High Byte Low Byte
address Mode Value in ms
Programmer Window
address + 1 Mode Value in ms
System Communications Window
address + 2 must be zero must be zero reserved
All parameters are output parameters. It is not necessary to enter values in the parameter
block to program this function.
11.4.1.1 Example of SVCREQ 2
In the following example, when enabling output %Q00102 is set, the CPU places the
current time values of the windows in the parameter block starting at location %R0010.
200 GFK-1503E VersaMax PLC User Manual
For public disclosure
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