Technical Specifications Of The Micro Memory Card (Mmc); Clock - Siemens SIMATIC S7-300 Manual

Technical data
8.1 General technical data
8.1.2

Technical specifications of the Micro Memory Card (MMC)

Plug-in SIMATIC Micro Memory Cards
Memory modules available:
Table 8-1
Type
MMC 4M
MMC 8M
8.1.3

Clock

Features and functions
The following table contains the features and functions of the clock.
Table 8-2
Features
Type
Factory setting
Buffering
Buffered period
Behavior of the realtime clock after
POWER ON
Behavior of the clock on expiration of
the buffered period
Information on..
• Synchronization and correction factor:
• Set, read and program the clock:
8-2
Available MMCs
Order number
6ES7 953-8LM00-0AA0
6ES7 953-8LP10-0AA0
Features and functions of the clock
The CPU parameterization functions in
synchronization via MPI interface and correction factor. For further information, please
STEP 7 online help
refer to the
You can set and read the clock with the PG (see
You can also program the clock in the user program with SFCs (see reference manual
System and Standard Functions
Comments
-
Required for an operating system update
Technology-CPU
Hardware clock
DT#1994-01-01-00:00:00
By means of integrated capacitor
Typically 6 weeks (at an ambient temperature of 40 °C)
The clock continues running after POWER OFF.
The clock keeps running, continuing at the time-of-day it had
when power was switched off.
STEP 7
enable you to set functions such as
.
Programming with STEP 7
).
manual).
S7-300 CPU Data: CPU 315T-2 DP
Manual, 12/2005, A5E00427933-02