Step: Carrying Out A Dry Run - Siemens Simatic S7-300 31xC Series Getting Started Manual

3.5

5. Step: Carrying out a dry run

Procedure
1. In the "Blocks" directory, double-click on the variable table "VAT_GETST_d" in your
2. Go online with "PLC > Connect to > Configured CPU".
3. Activate monitoring with "Variable > Monitor".
4. Switch the CPU to RUN.
5. Try out the two following experiments. With "Variable > Activate Modify Values", you can
"Jogging" mode
Make the following settings:
MODE_IN = 1:
Select "Jogging" mode
DRV_EN = 1:
drive enable
SPEED:
Speed: 0 = Creep speed, 1 = Rapid traverse
Starting the drive:
DIR_P = 1: Jogging in plus direction
DIR_M = 1: Jogging in minus direction
Note: If both variables DIR_P and DIR_M are
activated, no positioning is possible.
First Steps in Commissioning CPU 31xC: Positioning with digital output
Getting Started, 08/2011, A5E00105533-03
project.
The variable table for monitoring and modifying is displayed.
At the bottom right, you will see that the CPU is set to "STOP" mode.
The current values of the addresses are displayed in the "Status Value" column.
CAUTION
The next two test steps start the drive.
You can stop the drive in one of the following ways:
 Set the control value for the direction to 0 again and activate it
 Set the control value for the drive enable to 0 again and activate it
 Change the CPU to STOP
At the bottom right, you will see that the CPU is set to "RUN" mode.
make the control values valid.
3.5 5. Step: Carrying out a dry run
You can monitor the following signal statuses in
the column "Status Value":
ST_ENBL = 1:
Start enable
MOD_OUT = 1:
Current mode "Jogging"
WORKING = 1:
Travel active
ACT_POS:
Current actual position
Learning units
17