Siemens SIMATIC S7-1200 매뉴얼 - 페이지 18
{카테고리_이름} Siemens SIMATIC S7-1200에 대한 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Siemens SIMATIC S7-1200 49 페이지. Controlling several fans (ebm-papst) via modbus rtu
Siemens SIMATIC S7-1200에 대해서도 마찬가지입니다: 매뉴얼 (30 페이지), 사용 설명서 (36 페이지), 안전 프로그래밍 매뉴얼 (48 페이지), 매뉴얼 (40 페이지), 매뉴얼 (17 페이지), 매뉴얼 (31 페이지), 매뉴얼 (20 페이지)
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3 Mode of Operation
Program workflow
Figure 3-3
Figure 3-3
Index
Acyclic
The sequence for reading the input registers of each fan is processed cyclically as
a function of the running index "IndexCyclic". The information (access mode
"mode", register address "addr" and register length "len") are provided as start
values in the interface parameter "cyclic" in the field 0 to 7.
The following is written into the last field ("cyclic.last") via the HMI depending on the
request ("read", "readAll" or "write"):
the holding register to read (provided in the interface parameter "read")
the sequence for reading the acyclic registers as a function of the running
index "IndexAcyclic" (provided in the interface parameter "acyclic")
the holding register to write to (provided in the interface parameter "write")
The field ("cyclic.last") is only processed if the data length "len" is greater than zero.
Based on the running index "IndexCyclic", the information is transferred to the
static placeholder "statDataAct" and handed to the communication block
"Modbus_Master".
The system block "Modbus_Master" provides the interface for exchanging data with
the ebm-papst fans via Modbus RTU.
The 9-word field "dataPtr" in the static parameter "statModbusMaster" functions as
a data buffer for the read values/the values to write. It is limited to 9 words due to
the permitted maximum telegram length of the fan.
Controlling several fans (ebm-papst) via Modbus RTU
Entry ID: 109476801,
V2.0,
shows the schematic structure of the FB "EbmPapst".
read
readAll
write
write
write
09/2018
Index
Cyclic
read
mode
= 0
Register
mode
Index
= 104
Fan
Index
Read
Index
18