Features Of The Clock - Siemens SIMATIC IM 151/CPU Manual

Functions of the IM 151/CPU
5.5 Clock
The IM 151/CPU has an integrated software clock.
Setting, Reading and Programming the Clock
You set and read the clock using the programming device (see the STEP 7 ) User
Manual) or program the clock in the user program using SFCs (see the System
and Standard Functions Reference Manual and Appendix C).
Features
The table below indicates the features and functions of the clock.
When you parameterize the CPU in STEP 7 , you can also set functions such as
synchronization and correction factors (refer to the STEP 7 online help system for
information on how to do this).
Table 5-7

Features of the Clock

Type
Manufacturer setting
Backup
Operating hours counter
Behavior of the Clock When Power Is Off
At power on, the CPU clock continues from the time valid at power off.
5-12
Features IM 151/CPU
Software clock
DT#1994-01-01-00:00:00
Not possible
1
ET 200S Interface Module IM 151/CPU
A5E00058783-01