Siemens 353 User Manual page 18

Introduction
The MultiMediaCard (MMC) mentioned in the preceding paragraph is a small memory card that plugs into an
MMC socket on the Controller board. A card can be used to:
•
Transfer configurations from a PC running i|config to a series of controllers (at the PC, a compatible
card reader or PC card slot is required)
•
Transfer a configuration from a controller to a PC running i|config (at the PC, a compatible card
reader or PC card slot is required)
•
Transfer the operating configuration from a removed controller to the replacement controller
•
Save an operating configuration prior to making changes to that configuration
The operating configuration in the controller is written to the MMC root directory, with the station serial number as
the file name, whenever:
•
The MMC is inserted in the MMC socket
•
The MMC is removed from the MMC socket
•
The controller is powered up
•
The controller is powered down
•
The configuration is edited and stored from the faceplate (i.e. display assembly)
Any of the above five actions will cause a previously saved configuration file to be over written by the current
configuration.
To save a particular version of a configuration prior to making configuration edits, select
a unique 8-character file name and then press STORE to save the configuration – refer to
Figure 2-2 MultiMediaCard Road Map to change the file name.
After saving a configuration with a unique file name, subsequent configuration edits will
again be saved to the MMC root directory with the controller serial number as the file
name unless you save them with a new file name. Multiple file directories can be created
on the MMC.
To transfer a configuration from one controller to another, the controllers must have the same firmware revision
level. If the firmware levels differ, an error message will be displayed on the alphanumeric display of the receiving
controller. An error message will be displayed if the receiving controller does not have the correct hardware (circuit
boards) for the new configuration or if the configuration contains function blocks that are not valid for the controller
design level. See Section 10.4.3 MultiMediaCard Error Codes for details.
A configuration created at the controller faceplate consists of a database file with a .V3C extension. A 353
configuration created at a PC running i|config consists of two files: a database file with a .V3C extension and a
graphical file with a .353 extension. When a configuration is saved to a MultiMediaCard from i|config, both files
are stored ensuring that both are available for merging by i|config should the configuration require editing.
Downloading a configuration from i|config to a controller will transfer only the .V3C database file.
1-6
IMPORTANT
UM353-1B
April 2012