python 连接S7-1200
时间: 2023-10-13 20:11:42 浏览: 284
要使用 Python 连接 S7-1200 PLC,需要使用 Python 的 S7comm 库。以下是连接 S7-1200 的基本步骤:
1. 安装 Python 的 S7comm 库:
```python
pip install python-snap7
```
2. 导入 Snap7 库:
```python
import snap7
from snap7.util import *
```
3. 连接到 S7-1200:
```python
client = snap7.client.Client()
client.connect('192.168.0.1', 0, 1)
```
其中,'192.168.0.1' 是 S7-1200 的 IP 地址,0 是 Rack,1 是 Slot。
4. 读取数据:
```python
db = 1 # 数据块号
start = 0 # 起始地址
size = 10 # 读取的长度
data = client.db_read(db, start, size)
```
5. 写入数据:
```python
db = 1 # 数据块号
start = 0 # 起始地址
data = bytes([1, 2, 3, 4, 5]) # 写入的数据
client.db_write(db, start, data)
```
6. 断开连接:
```python
client.disconnect()
```
以上是使用 Python 连接 S7-1200 的基本步骤,具体的读写操作可以根据自己的需求进行修改和扩展。
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