修改bug

DK.Service/CMNModuleService/PLCWorkLogic..cs

@@ -82,7 +82,7 @@ namespace Dongke.IBOSS.PRD.Service.CMNModuleService
                         
                     }
 
-                    return null;
+					return new ServiceResultEntity() { Status = Constant.ServiceResultStatus.Other, Message = "当前工号无工位信息" };
 
                 }
                 catch (Exception ex)