1.首先從官網下載完整包，解壓后從\snap7-full-1.4.2\snap7-full-1.4.2\release\Windows\Win64文件夾把snap7.dll文件和snap7.lib文件拷入已經注冊環境變量Path的路徑，可以是python.exe文件或庫的路徑。

2.安裝python-snap7

3.安裝完畢后，先導入庫,常見的有

import snap7 from snap7.types import * from snap7.util import *

4.完整程序如下：

import snap7 from snap7.types import * from snap7.util import *plc = snap7.client.Client() plc.connect('192.168.1.108', rack=0,slot=0)# In this example boolean in DB 31 at byte 120 and bit 5 is changed. = 120.5 reading = plc.db_read(31, 120, 1) # read 1 byte from db 31 staring from byte 120 snap7.util.set_bool(reading, 0, 5) # set a value of fifth bit plc.db_write(reading, 31, 120, 1) # write back the bytearray and now the boolean value is changed# in the PLC.# NOTE you could also use the read_area and write_area fu

總結

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