Accessing Process Data In The User Program Of The S7-300/400F; Standardizing The Setpoint And Actual Values - Siemens SINAMICS G120 Manual

5 Functional Mechanisms of this Application
5.1 Functionality of process data exchange
5.1.1

Accessing process data in the user program of the S7-300/400F

At the start of the cycle, the operating system of SIMATIC S7-300/400F stores the
(user) data received by the SINAMICS G in the I/O input area of the SIMATIC
S7-300/400F CPU and transmits the data stored in the I/O output area to the
SINAMICS G at the end of the cycle. In the user program, the data can be
accessed by reading from or writing to the I/O area. The address areas used are
defined when specifying the hardware configuration. See step
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If the I/O is accessed with the SFC 14/15 system functions, the consistency is
ensured across the entire data, hence, these functions are used in the example
program.
5.1.2 5.1.2

Standardizing the setpoint and actual values

Standardizing the setpoint and actual values
The setpoint and actual values are transferred as standards. The reference values
are stored in parameters P2000 to P2006 of the SINAMICS G.
FB20 "Parameter_Access" takes on entirely the conversion of setpoint and actual
values. The reference values for speed current, torque stored in parameters
P2000, P2003 and P2004 of SINAMICS must also be entered at the block input.
16384dec = 4000hex = 100% applies here, with 100% referring to the reference
value for the transferred variable.
Example:
If P2000 (reference speed or reference frequency) is 1500 1/min and if a speed
of 500 1/min shall be run, then 33% or 5461dec must be transferred.
SINAMICS G120C at S7-300/400F-DP
Beitrags-ID: 60441457, V2.2, 11/2014
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