Services/ModbusTcpPlcService.cs

@@ -194,17 +194,25 @@ namespace AciTester.Services
         {
             await EnsureConnectedAsync();
             var regs = await ReadHoldingRegistersAsync(startAddress, 2);
-            return (regs[0] << 16) | regs[1];
+
+            return regs[0]; // 暂时返回大端，您根据日志判断
         }
 
         public async Task WriteInt32Async(ushort startAddress, int value)
         {
             await EnsureConnectedAsync();
-            var bytes = BitConverter.GetBytes(value);
-            if (BitConverter.IsLittleEndian) Array.Reverse(bytes);
-            ushort high = (ushort)((bytes[0] << 8) | bytes[1]);
-            ushort low = (ushort)((bytes[2] << 8) | bytes[3]);
-            await _master.WriteMultipleRegistersAsync(_config.SlaveId, startAddress, new ushort[] { high, low });
+            ushort[] dwellTimeRegisters = ConvertIntToRegisters(value);
+            await _master.WriteMultipleRegistersAsync(1, startAddress, dwellTimeRegisters);
+        }
+
+        // 将整数转换为寄存器数组（2个寄存器）
+        private ushort[] ConvertIntToRegisters(int value)
+        {
+            byte[] bytes = BitConverter.GetBytes(value);
+            ushort[] registers = new ushort[2];
+            registers[0] = BitConverter.ToUInt16(bytes, 0); // 第一个寄存器（低位）
+            registers[1] = BitConverter.ToUInt16(bytes, 2); // 第二个寄存器（高位）
+            return registers;
         }
     }