Best Before / Utc Time Supply; Fb_Bbd; Description - Siemens SIMATIC PCS 7 Function Manual

Best before / UTC time supply

9.1

FB_BBD

9.1.1

Description

Object properties
The following table shows the object properties of the "FB_BBD" block:
FB_BBD
Area of application
The block is used to generate and provide the date of birth (DOB) and best before date (BBD),
and to supply the UTC time, local time (LOT) and modified Julian date (MJD).
Note
The AS time system must be set to UTC time. The block operates in a UTC time range of
January 01, 1990 to December 31, 2039.
Startup characteristics
The "FB_BBD" block is called from the startup OB upon CPU startup. This call is configured
during CFC configuration by the CFC editor. Internal data and outputs are reset upon startup.
Program execution starts once the "RUNUPCYC" cycles have elapsed.
During startup, the output "QRUN_UP" = 1.
Time characteristics
The block must be called from a cyclic interrupt OB. The CFC Editor enters the sampling time
of the block in the "SAMPLE_T" parameter.
Communication
Communication on the AS level is performed via the block inputs/outputs.
There is no data communication with the OS.
Advanced Process Functions (APF)
Function Manual, 07/2016, A5E38719883-AA
Name Number
FB1794
Family
APF
9
Module
Best before
235