CPU ADAM 821x
Chapter 7 Integrated OBs, SFBs and SFCs
ADAM 8000 Manual CPU 821x – Rev 1.1
7-3
Integrated OBs and SFBs
The system program of the CPU 811x offers you some additional functions,
that you may use by calling FBs, FCs or OBs. Those additional functions
are part of the system program and don't use any work memory. Although
the additional functions may be requested, they can not be read or altered.
The calling of an additional function via FB, FC or OB is registered as block
change and influences the nesting depth for blocks.
The following organization blocks (OBs) are available:
OB
Description
OB 1
Free cycle
OB 10
Clock alarm
OB 20
Delay alarm
OB 35
Prompter alarm
OB 40
Process alarm
OB 80
Cycle time exceeded or clock alarm run out
OB 82
Diagnostic alarm
OB 85
OB not available
OB 86
Slave failure res. restart
OB 100 Reboot
OB 121 Synchronous errors
OB 122 Periphery error at n
th
access
The following system function blocks (SFBs) are available:
SFB
Label
Description
SFB 0
CTU
Count up
SFB 1
CTD
Count down
SFB 2
CTUD
Count up and down
SFB 3
TP
Create pulse
SFB 4
TON
Create turn-on delay
SFB 5
TOF
Create turn-off delay
SFB 32
DRUM
realize a step-by-step switch with maximum 16
steps
General
Integrated OBs
Integrated SFBs
