Page 227 - ExtendSim User Guide
P. 227

Processing 201
Transportation and material handling
☞ While you can choose either feet or meters as the
distance unit in the block’s dialog, the default is
feet. If Metric distance units has been selected in the Edit > Options command, the default will be meters.
Travel time options
The block’s Behavior tab has options that specify how to calculate travel time – the time it will take an item to travel from the starting point to the ending point. Travel time can be based on:
• Move time. Each item will take the amount of simulation time that is entered in the Move time field or received at the D input connector. This acts just like a delay in an Activity block; length and speed are ignored.
• Speedanddistance.Howfasttheitemistraveling,andhowfartheitemmusttraveltoreach its destination, are entered in the fields in the Behavior tab or received at input connectors. The calculated move time is displayed in the dialog. This option is most often used if the transportation pathway is centered around the block.
• Speedandcalculateddistance.Theitem’sspeedisenteredintheItemspeedfieldor received at an input connector. The distance is determined from information entered in the frame labeled “Select From and To locations for calculated distance”, as discussed below. This travel time option is most commonly used for 3D animation when you want the loca- tion of the transportation pathway to be independent from the block.
☞ If Speed and calculated distance is selected, the starting and ending locations (which deter- mine the distance) must be defined in the tab.
Calculated distance
If Speed and calcu-
lated distance has been
selected as the travel
time, a frame appears at
the bottom of the dialog
for entering the distance
information. If the from
and/or to locations are
set to anything other than
Entered X and Y loca-
tion, the relative posi-
tions of the blocks in the
model, and their connections, determine the distance.
The factors considered in the calculation are: the “from” location, the “to” location, how the distance is calculated, and the distance ratio.
Transport blocks
Transport blocks (Item library) move items from the start of a path to the end based on distance and speed information. When the model is animated, these blocks can display multiple items travelling a certain distance simultaneously. There is also an option to specify that items cannot pass each other.
Transport block: Behavior tab
Frame for entering information to be used to determine the distance
Discrete Event

   225   226   227   228   229