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Siemens SIMATIC S7-1200 マニュアル
4 Installation and Commissioning
No.
Open the "User constants" register and
2.
increase "FAN_MAX" to the maximum number
of fans to be operated. This expands the array
"fan" and therefore also the RAM usage of the
CPU project.
Note: When decreasing "FAN_MAX"
(< 4), the tag references of the HMI are also
deleted which leads to errors during
compilation!
Open the DB "Register".
3.
Under "fan[x].mbAddr", enter the Modbus
address of the respective fan as a start value
(1 ≤ x ≤ "FAN_MAX"; 0 serves as a
placeholder for the HMI display "Fan view").
Open the DB "Tags".
4.
Enter the actual number of fans under
"ebmPapst".lastFan. The actual value is
limited by the FB "EbmPapst" to 1 ≤ lastFan ≤
"FAN_MAX".
4.3.3

Downloading the controller project part

Table 4-6
No.
1.
If changes have been made, save and compile
the project.
Select the program folder of the S7-1200 and
transfer the program into the controller by
clicking the "Download to device" option.
Select the option "Start module" in the "Load
results" under "Start modules" and complete
the loading process.
Controlling several fans (ebm-papst) via Modbus RTU
Entry ID: 109476801,
V2.0,
Action
Action
09/2018
Remarks
Remarks
see S7-1200 manual (\8\)→
Chapter 15.2
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