Python采集学习笔记-将西门子S7DB数据写入MySQL数据库

1.导包

# 连接plc
import snap7
# 连接db点
from snap7 import util
# 连接MySQL
import pymysql
# 获取时间
import time

2.连接MySQL

cnx = pymysql.connect(host='localhost', port=3306, user='root', password='123456', db='qdqm', charset='utf8')

 3.创建通讯客户端实例

plcObj = snap7.client.Client()

4.连接到plc

plcObj.connect('192.168.0.6', 0, 2)

5.读取数据

data = plcObj.db_read(9999, 0, 896)
read_data = util.get_int(data, 0)

 6.创建游标

cursor = cnx.cursor()

 7.获取当前时间

current_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

8.sql语句

sql = f"INSERT INTO db1 (id,name,value,date) VALUES (1,'张三','{read_data}','{current_time}') 

 9.执行语句

cursor.execute(sql)

 10.提交

cnx.commit()

11.关闭plc连接,关闭数据库连接

plc.disconnect()
cursor.close()
connect.close()