Siemens SIMATIC S7-200 System Manual page 286

S7-200 Programmable Controller System Manual
Command byte
Next enter the Q byte address for the command byte. The command byte is the address of the 8
digital outputs reserved in the process image register for the interface to the Position Module. See
Figure 4-11 in Chapter 4 for a description of the I/O numbering.
Defining the motion profile
In the motion profile definition screen, click the new profile button to enable defining the profile.
Choose the desired mode of operation.
For an absolute position profile:
-
Fill in the target speed and the ending position. You may then click the plot step button to
see a graphical representation of the move.
If more than one step is needed, click the new step button and fill in the step information as
required.
For a relative position profile:
-
Fill in the target speed and the ending position. You may then click the plot step button to
see a graphical representation of the move.
If more than one step is needed, click the new step button and fill in the step information as
required.
For a single-speed, continuous rotation:
-
Enter the single speed value in the edit box.
Select the direction of rotation
If you wish to terminate the single speed, continuous rotation move using the RPS input,
click the check box.
For a two-speed, continuous rotation:
-
Enter the target speed value when RPS is high in the edit box.
Enter the target speed value when RPS is low in the edit box.
Select the direction of rotation
Define as many profiles and steps as you need to perform the desired movement.
Finish the configuration
After you have configured the operation of the Position module, you simply click Finish, and the
Position Control wizard performs the following tasks:
Inserts the module configuration and profile table into the data block for your S7-200
-
program
Creates a global symbol table for the motion parameters
-
Adds the motion instruction subroutines into the project program block for you to use in your
-
application
You can run the Position Control wizard again in order to modify any configuration or profile
information.
Tip
Because the Position Control wizard makes changes to the program block, the data block and
the system block, be sure to download all three blocks to the S7-200 CPU. Otherwise, the
Position module might not have all the program components that it needs for proper operation.
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