130
••••
6 - Programming
Simatic 505 SoftShop
Clearing Memory
This option allows you to clear all or parts of logic memory, data, tags,
and documentation in the current program.
You can use clear memory in either online or offline mode. When
programming offline, you clear the entire active program or parts. When
programming online, you clear the PLC memory. However, you cannot
clear memory online while the processor is in Run mode. You must first
stop the processor before clearing the memory online.
The following is a list of parts of memory that can be cleared:
•
Ladder
•
V Data
•
K Data
•
Word I/O Data
•
TCC/TCP Data
•
DSP/DSC Data
•
PID Loops
•
Analog Alarms
•
Special Functions Programs
•
Special Functions Subroutines
•
U-Memory
To access the Clear Memory option:
1.
If you want to save the changes you've made to your logic and
documentation, save them before going to Step 2. Use the Save
Program or Save Program As options in the File menu.
2.
Click Clear Memory from the PLC Utilities menu (Alt+U, L,
A). A warning message appears stating all program logic, data
values, tags, and documentation will be deleted.
3.
Click Yes to clear all memory. If changes to the program were
not saved, another warning message appears stating that
changes to your program were not saved; do you wish to
continue with the clear memory procedure. Click Yes to clear
the memory.
Selecting (575) Application
When you configure a 575 controller offline, you must first select the
application:
1.
Select PLC Configuration from the PLC Utilities menu. The
PLC Configuration dialog box appears (Figure 5.2).
2.
Select the
ReqApp
button under the Processor Information
window on the PLC Configuration dialog box. The Required
Application dialog box appears (Figure 6.15).
You can change the Application ID only during offline configuration.
(Configuring the controller online displays the current application.)
Figure 6.15
