Technical data

2.2.2
Organization Blocks for
Special Functions
The following organization blocks contain special functions of the
system program. You
cannot program these blocks, but simply call
them (this applies to all OBs with numbers between 40 and 255!).
They do not contain a STEP 5 program. Special function OBs can be
called in all logic blocks.
Integral organization blocks with special functions
Block: Block function:
OB 110
OB 111
OB 112
OB 113
Access to the status (condition code) byte
Clear ACCU 1, 2, 3 and 4
ACCU roll up
ACCU roll down
OB 120
OB 121
OB 122
OB 123
"Block all interrupts" on/off
"Block individual time interrupts" on/off
"Delay all interrupts" on/off
"Delay individual time interrupts" on/off
OB 150 Set/read system time
OB 151 Set/read time for clock-controlled time
interrupt
OB 152 Cycle statistics
OB 153 Set/read time for delay interrupt
OB 160-163 Counter loops
OB 170 Read block stack (BSTACK)
OB 180
OB 181
OB 182
Variable data block access
Test data blocks DB/DX
Copy data area
OB 190, 192
OB 191, 193
Transfer flags to data block
Transfer data fields to flag area
OB 200, 202-205 Multiprocessor communication
OB 216-218 Access to "pages" (CPs and some IPs)
OB 220 Sign extension
OB 221 Set cycle monitoring time
OB 222 Restart cycle monitoring time
Table 2-4 Overview of organization blocks for special functions
2
Program, Organization and Sequence Blocks
CPU 928B Programming Guide
C79000-B8576-C898-01
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