Archive Management; Fb_Xxxa (Fb_Xxxai, Fb_Xxxar); Description - Siemens SIMATIC PCS 7 Function Manual

Archive management

8.1

FB_XXXA (FB_XXXAI, FB_XXXAR)

8.1.1

Description

Object properties
The following table shows the object properties of FB_XXXAD:
FB_XXXA
Area of application
The "FB_XXXA" block is used to archive data records from the AS. You can add new data
records to the user archive and update or delete existing data records.
On the basis of the "FB_XXXA" block, the APF Engineering Tool generates the "FB_XXXAI"
and "FB_XXXAR" blocks for displaying format-related numerical values.
Startup characteristics
The "FB_XXXA" 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
Data exchange with the "FB_UA_RM" communication block on the AS level is performed via
the "UDT_UA_R_REQ_ST" (request) and "UDT_UA_R_ST" (feedback) structures.
The "ALARM_8P" structure is used to implement data communication with the OS message
system.
The archiving data at the block output are available in the OS as WinCC tags.
Advanced Process Functions (APF)
Function Manual, 07/2016, A5E38719883-AA
Name Number
FB1793
Family
APF
8
Module
Archive management
211