Changing Plc Types - Siemens SIMATIC 505 User Manual

Simatic 505 SoftShop
PLC Setup Option
PLC Type
PLC Memory Size
Table 5.1
4. Click OK or press Enter to save your settings and return to the
active logic program.

Changing PLC Types

The PLC type can be changed even after programming has been initiated.
Various error or warning messages can occur when changing from one
PLC type to another. These error messages indicate the block and
segment of the error. The errors must be fixed before the new PLC's
logic can be validated.
To change the PLC type:
1. Select PLC Type Setup from the PLC Utilities menu.
Result: The PLC Type Setup dialog box appears (Figure 5.1).
2. Select the appropriate PLC Type and PLC Memory Size.
PLC Memory Configuration
Controller memory is composed of several functional types (refer to
Table 5.2). You can configure the amount of memory that is allotted to
some these areas. This is dependent upon your application and PLC type.
The configurable memory sizes are given in the SIMATIC 545/555/575
System Reference Manual.
Ladder
User Data
Description
Specifies the type of processor.
Selection of PLC type determines
choices available for remaining setup
options in the PLC Type Setup dialog
box.
Specifies the PLC's memory size.
Only the valid memory sizes for the
PLC selected in PLC Type are
displayed.
User Program Memory
•
Ladder Memory stores
RLL program.
•
Special Memory stores
loops, analog alarms, and
SF Programs.
•
User Memory stores user-
defined subroutines.
Data Area Memory
•
Variable Memory stores
variable data.
•
Constant Memory stores
constant data.
•
Global and VME
Memory are used for
VME data transfer
(applies to 575 only).*
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