Technical data

Setting Up and Editing the Project
6.7 Editing a Project
Programming with STEP 7
182 Manual, 05/2010, A5E02789666-01
6.7.3.2 Using a Micro Memory Card as a Data Carrier
A SIMATIC Micro Memory Card (MMC) can be used with STEP 7 in the same manner as any
other type of external data storage medium.
After you have determined that the MMC has enough capacity to accommodate all the data to be
stored, you can transfer any data visible in the operating system's file explorer to the MMC.
In this way, you can make additional drawings, service instructions and functional descriptions
pertaining to your plant available to other personnel.
6.7.3.3 Memory Card File
Memory Card files (*.wld) are generated for the
• Software PLC WinLC (WinAC Basis and WinAC RTX) and
• SlotPLCs CPU 41x-2 PCI (WinAC Slot 412 and WinAC Slot 416).
The blocks and system data for a WinLC or CPU 41x-2 PCI can be saved in a Memory Card file as
in an S7-Memory Card. The contents of these files then correspond to the contents of a
corresponding Memory Card for a S7-CPU.
This file can then be downloaded by a menu command of the operating panel of the WinLC or CPU
41x-2 PCI into their download memories, corresponding to the downloading of the user program
with STEP 7.
In the case of the CPUs 41x-2 PCI this file can be downloaded automatically when the PC
operating system is started up, if the CPU 41x-2 PCI is not buffered and is only operated with a
RAM Card ("Autoload" function).
Memory Card files are "normal" files in the sense of Windows, which can be moved, deleted or
transported with a data medium with the Explorer.
For further information please refer to the corresponding documentation of the WinAC products.