使用Python（modbus连接）将位发送至西门子Logo 8

Question

我正试图用Python从我的pc（192.168.0.2）向西门子网络输入（IP:192.168.0.11:504）发送1位数据。但我不能让它工作。目标是通过modbus连接发送bit以触发BO31条件

我的Python代码：

import socket
from umodbus import conf
from umodbus.client import tcp
 
# Enable values to be signed (default is False).
conf.SIGNED_VALUES = True
 
### Creating connection
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect(('192.168.0.11', 504))
 
message = tcp.write_multiple_coils(slave_id=1, starting_address=1, values=[1, 0, 0, 0])
 
# Response depends on Modbus function code. This particular returns the
# amount of coils written, in this case it is.
response = tcp.send_message(message, sock)
print(response)
sock.close()
print("Transfer finished")

Answer 1

根据我的评论tcp.write_multiple_coils(slave_id=1, starting_address=1, values=[1, 0, 0, 0])写了四个线圈（1/对线圈1为真，然后0/对线圈2、3和4为假）；要编写单个线圈，请使用write_single_coil或tcp.write_multiple_coils(slave_id=1, starting_address=1, values=[1])（这最好取决于您的设备；并非所有设备都实现这两种功能，但我建议从write_single_coil开始）