plc

applications/PLC_link.c

@@ -50,7 +50,6 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
     }else
     {
         rt_thread_mdelay(500);
-        return;
     }
 
     // 输出 m0256 -> RTU 2256
@@ -68,10 +67,9 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
     }
     // 写入 Modbus
     int mwy = mb_write_bits(hinst, 2256, DO_TABLE_SIZE, w_buffer);
-    if (mwy <= 0)
+    if (mwy ==0)
     {
         rt_thread_mdelay(500);
-        return;
     }
 
     //输入寄存器d0->6000
@@ -86,7 +84,6 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
         }
     }else {
         rt_thread_mdelay(500);
-        return;
     }
 
     //输出寄存器d100->6100
@@ -97,10 +94,9 @@ static void mb_plc_read_regs(mb_inst_t *hinst)
     }
     // 写入 Modbus
     int mwd = mb_write_regs(hinst, 6100, AO_TABLE_SIZE, w_regsD);
-    if (mwd > 0)
+    if (mwd == 0)
     {
         rt_thread_mdelay(500);
-        return;
     }
 }