Merge pull request #530 from hxy7yx/v2.11

[v2.11]modbus-tcp: backup ip&port

en_US/configuration/south-devices/modbus-tcp/modbus-tcp.md

@@ -35,6 +35,8 @@ After clicking **Create**, you will be redirected to the **Device Configuration*
 | **Device Degradation** | Enable or disable device degradation mechanism. |
 | **Failure Threshold for Degradation** | The number of consecutive failure cycles required to trigger device degradation. |
 | **Recovery Time After Degradation** | The time in seconds after which the device recovers from degradation. |
+| **Backup IP Address** | Optional, when the connection is abnormal, it will automatically connect to the backup address. If the backup address connection is abnormal, it will automatically connect to the original address. |
+| **Backup Port** | Optional, when the connection is abnormal, it will automatically connect to the backup address. If the backup address connection is abnormal, it will automatically connect to the original address. |
 
 ::: tip  
 The above configuration can meet the individualized needs of the device:<br>  

zh_CN/configuration/south-devices/modbus-tcp/modbus-tcp.md

@@ -32,6 +32,8 @@ Neuron 的 Modbus TCP 插件除了支持以 TCP 客户端的模式主动接入
 | **设备降级** | 启用或禁用设备降级机制。 |
 | **降级失败阈值** | 触发设备降级所需的连续失败周期数。 |
 | **降级恢复时间** | 设备从降级中恢复所需的时间（单位：秒）。 |
+| **备用 IP 地址** | 选填，当连接异常后会自动尝试连接备用地址，备用地址连接异常会自动尝试连接原地址。 |
+| **备用端口号** | 选填，当连接异常后会自动尝试连接备用地址，备用地址连接异常会自动尝试连接原地址。 |
 
 ::: tip  
 上述配置可以满足设备的个性化需求：<br> 
@@ -161,4 +163,4 @@ Modbus 驱动的一个寄存器包含 2 个 bytes，在以 bytes 数据类型读
 
 ## 数据监控
 
-完成点位的配置后，您可点击 **监控** -> **数据监控**查看设备信息以及反控设备，具体可参考[数据监控](../../../admin/monitoring.md)。
+完成点位的配置后，您可点击 **监控** -> **数据监控**查看设备信息以及反控设备，具体可参考[数据监控](../../../admin/monitoring.md)。