Siemens SIMATIC EM 148-FC, Руководство пользователя

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Functions and Technical Specifications
4-2
EM 148-FC Frequency Converter
A5E00065321-03
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 Structure of the output data object
Address Description
Word 0 (bytes 0 and 1) Control word (see below)
Word 1 (bytes 2 and 3) Main setpoint value = setpoint value for motor frequency
(resolution = 0.01 Hz)
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 Byte 0 Byte 1
Bit 0 Bit 15