diff --git a/components/step_motor_ctrl_module/zcan_master_step_motor_ctrl_module.cpp b/components/step_motor_ctrl_module/zcan_master_step_motor_ctrl_module.cpp
index 4e51a9e..8fe179d 100644
--- a/components/step_motor_ctrl_module/zcan_master_step_motor_ctrl_module.cpp
+++ b/components/step_motor_ctrl_module/zcan_master_step_motor_ctrl_module.cpp
@@ -1,6 +1,7 @@
-#include "sdk\components\zprotocols\errorcode\errorcode.hpp"
 #include "zcan_master_step_motor_ctrl_module.hpp"
 
+#include "sdk\components\zprotocols\errorcode\errorcode.hpp"
+
 using namespace iflytop;
 
 #define TAG "StepMotorCtrlModule"
@@ -114,7 +115,7 @@ class StepMotorCtrlModule : public I_StepMotorCtrlModule {
   virtual int32_t read_pos(int32_t& pos) {  //
     status_t status;
     int32_t  err = read_status(status);
-    if (err != 0) {
+    if (err == 0) {
       pos = status.x;
     }
     return err;