9300 Servo PLC
System blocks
2.9 Digital master frequency input (DF_IN_DigitalFrequency)
2-37
9300ServoPLC EN 1.4
Example (
DFIN_nIn_v
in a 10 msec task):
• When the 10 msec task starts, the value of the counter is stored in a local area of the task and
the counter is reset. The value in the local area goves an average value in increments per 1
msec.
• If a position value is to be derived from this value, then it must be multiplied by
SYSTEM_nTaskInterval
/ 4, to get the result in increments per
10 msec, as in the example.
Example: In a 1 msec task,
SYSTEM_nTaskInterval
has the value 4 (4 * 250 µs=1msec)
• For Lenze FBs, this procedure has already been implemented in the FBs.
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