HBW High Bay Warehouse

Transcription

1 HBW High Bay Warehouse Guido Groß Table of Contents About the Library 3 Creating a Sample Warehouse 11 Parametrizing the HBW Model 20 Removing Parts from Warehouse 23 Creating Your Own WMS 27 Page 2

2 About the Library The HBW library has been created from scratch Replaces the former HBW3D library which is no longer supported The HBW library provides more objects than the previous HBE3D library The HBW library is free of charge, it does not need any special license The library is part of the Plant Simulation 13 installation Page 3 Purpose The HBW library can be used to create a high bay warehouse system for the automotive and other industries The High Bay Warehouse is a storing object, based on the built-in object STORE The warehouse management system controls all activities for storing and retrieving products in the warehouse Page 4

3 The Objects of the Library The HBW library provides two objects The warehouse management system WMS controls all storing places in the warehouse The object Racklane provides the functionality of an entire rack lane The method usersettarget can be used to get all storing parameters from the warehouse and storing them as attributes of the MU which activates the method Page 5 The MUs of the Library The EUR_Palette is a standard palette with the dimension 800 x 1200 x 144 mm³. Its capacity is 1. The EUR_Palett_2x2 also is a standard palette but has a capacity of 2x2 Both MUs can be used as template for your own MU Page 6

4 Warehouse Management System (WMS) The WMS collects all information about the rack lanes of the warehouse during the INIT phase Clicking the Show Content button displays a table with all products and quantities currently stored in the warehouse For each product you can define in which rack lane the product should be stored If you want to automatically remove products, you can define the time at which removing will start and the interval between two removing activities Page 7 The Racklane Object Each Racklane of your simulation model can be parametrized individually You can define the parameters of the rack serving unit Define the number of columns and rows of the racks and the dimension of the storage places within the racks Define the dimension of the conveyors serving the RSU Page 8

5 Geometry of a Rack Lane Box Depth Box Depth Track Width Rack 1 Rack 2 Safety Distance 0.1m The rack lane has two racks, the dimension of each rack is defined by the Number of Columns, the Number of Rows and the dimension of a storage place All storage places of a rack lane have the dimension defined above Convey or IN Convey or OUT Safety Distance 0.2m Exit Length Converter1 is automatically parametrized to feed in all MUs for the rack lane You can define the length of the conveyor IN and OUT Conver ter 1 Convey or Conver ter 2 Conveyor Width You also can define the width of the conveyor Page 9 The length of the connecting conveyor between the two converters is calculated The Rack Serving Unit You can define the height of the RSU Height of RSU The RSU drives on rails on the floor The Load Handler drives up and down The Carrier moves the palettes in and out of the rack Load Handler Carrier Page 10

6 Creating a Sample Warehouse Start Plant Simulation 13, create a new model, select 3D only Open the library manager and add the HBW library Switch to Planning View Page 12

7 Add a Source and a conveyor with a length of 10m Add a Table, drag it over the Source and drop it there Open the Table and enter the parameters for creating four different parts Page 13 Add a second Source and a second Conveyor as shown on the left hand side Select EUR_Palette_2x2, move it over the Source and drop it there. The Source will now create instances of EUR_Palette_2x2 Page 14

8 Insert a TransferStation between the two conveyors Select Load from Line to Line1 at position 8m On tab Advanced Attributes select Always stop container and Homogeneous loading Page 15 Insert the Method usersettarget Select Line1, click the right mouse button and select Create Sensor Enter usersettarget as the control of the sensor Page 16

9 Insert the object RackLane three times Make sure that Line1 and the three RackLanes are connected Page 17 Add a conveyor and a Drain Insert the WMS object Click Reset and Start in the EventController to start the simulation of the warehouse Page 18

10 Page 19 Parametrizing the HBW Model

11 In a first step we want to make sure that product AA will be stored in RackLane2, product BB in Racklane1, and product CC and DD in the Racklane Open the dialog of WMS by double clicking its icon Click Open Table of Predefined Racks Enter the name of the products and the rack lane where you want to store the products Reset and Start the simulation run to view the results Page 21 Page 22

12 Removing Parts from Warehouse Removing Parts from Stock By default, parts will be removed from stock automatically Removing starts after 20 minutes and parts will be removed every 5 minutes Here we want to show how you can remove parts from stock on your own For this, clear the check box Activate automatic removing from stock Page 24

13 Removing Parts from Stock Page 25 Insert a Method object Insert a Variable of type integer and call it RemoveOrderNo Open the Method First we need to know how many parts of each type are currently available from stock. This will be done by using method stock of the WMS Select one of the products and the quantity you want to remove from stock Increment the order number RemoveOrderNo Call removeproducts of the WMS One or more palettes will be removed from stock. The palettes have the attributeorderno with the RemoveOrderNo you defined Removing Parts from Stock Here you see a sample implementation of the method with random access for product and quantity Page 26

14 Creating Your Own WMS Creating Your Own WMS If you want to create your own WMS, you have to support several functions. These functions will be described in detail below. Create a new Frame in the Class Library Insert a Method and call it INIT This method needs to have a callevery statement: Starting at root, all methods with the name register will be called. The parameter for the method register is the identifier HBW, the WMS object, and the method which should be called to register (register_hbw) The rack lanes will then register themselves by calling the method register_hbw Page 28

15 Creating Your Own WMS: Method register_hbw The Method register_hbw is called by each rack lane The following parameters are defined: RackLane: the name of the rack lane Box_W: the width of a storage place Box_D: the depth of a storage place Box_H: the height of a storage place Columns: the number of columns of one rack Rows: the number of rows of one rack These are the definitions of a rack lane Page 29 Creating Your Own WMS: Method getfreeplace We need a method called getfreeplace. The usage of this method can be seen in the method usersettarget The Method getfreeplace has the following parameters: Product: the name of the product (input parameter) sizew: the width of the product or the palette carrying the product (input parameter) The size parameters can be used sized: the depth of the product or the palette carrying the product (input parameter) to select a rack lane with the sizeh: the total height of the product and the palette carrying the product (input storage parameter) place dimension fitting the size parameter orderno: the order number for storing the product/palette (output parameter) Racklane: the name of the rack lane where the palette/product will be stored (output parameter) Side: left or right defining the rack within the racklane (output parameter) Column: the column number of the rack (output parameter) Row: the row number of the rack (output parameter The return value of the method is of type boolean, true if the output parameters have valid values, false otherwise Page 30

16 Creating Your Own WMS: Sequence of Storing Products usersettarget t OK Product is on the way to the storage place Storing process finished, RSU calls getfreeplace TransportFinished During this time, the products are not available in stock, they are somewhere on a conveyor or the RSU. This is used to prevent removing products before they are in stock. The storage place should be marked as reserved to make it unavailable for other Now palettes. the products are in stock. This method is called by the RSU after the palette is stored in the storage place. Parameter: OrderNo: the order number defined in getfreeplace Page 31 Creating Your Own WMS: Removing Products Add a Method and call it removeproducts Parameter of the method: Page 32 OrderNo: the order number of the remove order, mostly defined by the calling method Product: the name of the product to be removed from stock Quantity: the number of products (not palettes) to be removed First check if the product is defined in the warehouse Check if there are enough products available in the warehouse Determine the Racklane from which the palettes have to be removed You might have to remove more than one palette from the warehouse. For each palette to remove call: Restricted RackLane.appendOrder Siemens AG 2016

17 Creating Your Own WMS: Parameters of appendorder Each rack lane provides the method appendorder to append orders to the RSU This method has the following parameters: orderno: the order number for storing or removing palettes ordertype: the type of the order (put or get) Column: the column number where to store or remove the palette Row: the row number where to store or remove the palette Side: left or right to define the rack where the palette should be stored or removed After the RSU has finished removing a palette from the warehouse, the method RemoveFinished of the WMS will be called Page 33 Creating Your Own WMS: Method RemoveFinished This method will be called after a palette was removed from stock Now you can mark the storage place as free for other palettes Page 34

18 Guido Groß Senior Software Engineer Tecnomatix Plant Simulation Weissacher Straße 11 D Stuttgart Phone: Fax: siemens.com Page 35