Cyclic Data Traffic; Output Data Object (Control Interface); Structure Of The Output Data Object - Siemens SIMATIC EM 148-FC Manual

Functions and Technical Specifications
4.1

Cyclic data traffic

There are 4 bytes of user data available for sending and 4 bytes for receiving.
Direct access to the module is only possible in SIMATIC S7 with double word
commands. Note the access sequence of each DP master in SIMATIC S5.
You can find the structure of the output data sent to the Frequency Converter and
the structure of the input data received by it in the following sections.
4.1.1

Output data object (control interface)

Table 4-1
Word 0 (bytes 0 and 1)
Word 1 (bytes 2 and 3)
The Frequency Converter is controlled in accordance with the PROFIDRIVE profile
using the bits in the control word. The control word is divided up into bytes and bits
as follows:
Word 0
4-2

Structure of the output data object

Address
Control word (see below)
Main setpoint value = setpoint value for motor frequency
(resolution = 0.01 Hz)
Byte 0
Bit 15
Description
Byte 1
Bit 0
EM 148-FC Frequency Converter
A5E00065321-03