Technical data

Download, testing and diagnostics
CPU 317T: Technology Functions
8-6 A5E00251798-03
Position controller cycle
The position control of the axes is calculated in this cycle, for example. The
position controller cycle must be an integer multiple of the DP cycle. The
Technology CPU supports the values 1 and 2. Select a multiplication factor from
the drop-down list in order to set the required position controller cycle.
You should usually enter the value 1. Although you reduce the dynamic
performance of the controller by setting a value of "2", you provide more computing
time for the execution of other commands. The maximum and average task
execution time can be read from the MaxLoopDuration and CmdLoopDuration
variables of the technology DB MCDevice.
Note
The reduction ratio between the DP cycle and position control cycle is also set at
the drive as "Master application cycle" in order to enable interactive life-sign
monitoring. For further information, refer to the drive documentation..
Interpolator cycle (ipo)
The axis motion control is always calculated in the "IPO cycle". Based on the value
of the IPO cycle, you determine the time frame for calculating the drive setpoint
values Select a multiplication factor from the drop-down list in order to set the
required position control cycle.
Interpolator cycle 2 (ipo2)
"Interpolator cycle2" is used to control the motion of low-priority axes. Based on the
value of the IPO cycle, you determine the time frame for calculating the setpoint
values of the low-priority drive Select a multiplication factor from the drop-down list
in order to set the required interpolation cycle 2
Job monitoring time
The motion control commands requested in the STEP 7 user program are
executed within the remaining time slices by the integrated technology. The
function monitors the execution time of all busy motion control commands.
If the job monitoring time reports a time-out, the Technology CPU changes to the
safety state STOP, and an error message is written to the diagnostic buffer.
Technology DB update
Select an entry from the drop-down list to set the technology DB update interval for
the integrated technology.
Shorter intervals between updates prolong motion control execution times. Do not
set any cycles below the evaluating capacity of your program.