Functions
5.11 Operation in fieldbus systems
Frequency inverter
Operating Instructions, 08.10. 2008, t.b.d.
195
Once the read request has been issued and a waiting time of one second has elapsed, the
parameter values are copied from the frequency inverter via SFC 59 and saved in DB2.
FC3 to write parameters to the frequency inverter
Figure 5-39 Function block for writing parameters
You first have to define which value (MW35) is written to which parameter index (MW23) of
which parameter (MW21). The specifications are saved in DB3.
SFC 58 copies the specifications for the parameters to be written from DB3 and sends them
to the frequency inverter. No other write requests are permitted while this one is being
processed.
For more information about SFC 58 and SFC 59, consult the STEP 7 online help.
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