2 Solution
Advantages of this solution
In addition to the cyclic reading of the most important input registers of the ebm-
papst fan, the application example allows you to edit the most common holding
registers and to read fan-specific (non-writable) parameters upon request.
This application example offers the following advantages:
Input and output of the parameters with the correct unit and meaning through
the KTP900 Basic PN operator panel
Sequential cyclic reading of the key input registers of all fans
Overview of all (4) fans with bar graph display of the current modulation level
Automatic retrieval of the most common holding registers after selection and
subsequent editing of all fans
Collective retrieval of device-specific input registers and non-writable holding
registers of all fans upon request
Access to the register of each fan via the control program
Communication can be expanded to up to 32 fans
Topics not covered by this application
This application example establishes the sequential communication between the
S7-1200 and the ebm-papst Modbus fans by means of Modbus RTU.
The selected registers are converted to the correct unit according to their meaning
in line with the MODBUS parameter specification for "ebm-papst series 84 / 112 /
150 / 200" V5.00 and output.
To safely operate your ebm-papst fans, you have to familiarize yourself with this
specification.
This specification does not provide a detailed description of the parameters.
Using this application example you can also access other registers from the control
program (in addition to the ones selected in chapter 3.2). However, the conversion
into the correct unit is not implemented for these registers.
The MODBUS parameter specification for "ebm-papst series 84 / 112 / 150 /
Note
200" V5.00 is provided by ebm-papst when purchasing a fan/motor of this series
and upon request (see chapter 6.3).
Assumed knowledge
Basic knowledge and experience with the following subjects are required for this
application example:
SIMATIC S7-1200 controller family
TIA Portal engineering interface
MODBUS-RTU communication protocol
Controlling several fans (ebm-papst) via Modbus RTU
Entry ID: 109476801,
V2.0,
09/2018
8
Print Page