Calling Up The Software; Warm Restart (Ob100) And Hot Restart Ob (Ob101,S7-400 Only); Figure 3: Call In The Startup Ob - Siemens SIMATIC S7-300/400 Betriebsanleitung

User Manual SICLOCK DCF77 Reception Service for SIMATIC S7-300/400
3.3

Calling up the software

The time synchronization is done by calling up the FB77 DCF77_Empfangsdienst
(call FB77, DBxxx) with an instance data block. The automatic generation of this
instance data block is recommended in order to avoid conflicts with existing blocks.
The call up of the FB77 DCF77_Empfangsdienst must be carried out in places
described below.
3.3.1

Warm Restart (OB100) and Hot Restart OB (OB101,S7-400 only)

For Warm Restart or Hot Restart organization block, the function block FB77 must be
called with the parameter Aufruf=1. The diagnostic inputs can be set here
divergently from the default value of 0 as necessary.

Figure 3: Call in the Startup OB

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