Controlling several fans (ebm-papst) using the SIMATIC S7-1200 via Modbus RTU
These fans are equipped with an integrated RS485 interface and will be connected to a SIMATIC PLC via Modbus RTU, monitored and controlled.
It exchanges the motor data with the ebm-papst fans sequentially using the serial communication board CB 1241 RS485 via the Modbus RTU data protocol.
To operate and monitor the motor data, a SIMATIC HMI KTP900 BASIC (or its simulation in the TIA Portal) is used.
Configuration is performed with STEP 7 V15.1.
- 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 fans (default: 4) 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
Current version 2.0 for controlling several fans
Documentation V2.0 (2,9 MB)
TIA Portal V15.1 project V3.0 for S7-1200 from firmware V4.2.1 (2.8 MB)
How can you read input words in the address range from 9999 to 65535 with the SIMATIC S7-1200 via Modbus RTU?
How do you establish a MODBUS-RTU communication with STEP 7 (TIA Portal) for the SIMATIC S7-1200?
Updates for STEP 7 V15 and WinCC V15
Firmware updates for SIMATIC S7-1200 CPUs
Manual: SIMATIC S7-1200 Automation system
Update TIA Portal V15.1