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 121 and 255!).
They do not contain a STEP 5 program. Special function OBs can be
called in all logic blocks.
Integrated organization blocks with special functions
Block: Block function:
OB 121 Set/read time of day (compatible with CPU 946/947)
OB 122 "Disable interrupts" on/off
OB 124 Delete STEP 5 blocks
OB 125 Generate STEP 5 blocks
OB 126 Define/transfer process images
OB 129 Battery state
OB 131 Delete ACCU 1 to ACCU 4
OB 132 Roll up ACCU
OB 133 Roll down ACCU
OB 141 Enable/disable "disable individual timed interrupts"
OB 142 Enable/disable "delay all interrupts"
OB 143 Enable/disable "delay single timed interrupts"
OB 150 Set/read system time (compatible with CPU 928B)
OB 151 Set/read clock-controlled interrupt time
OB 153 Set/read time for delayed interrupt
OB 180 Variable data block access
OB181 Test data blocks (DB/DX)
OB 182 Copy data area
OB 200, 202 to 205 Functions for multiprocessor communication
OB 222 Restart cycle monitoring time
OB 223 Compare start-up types of CPUs in multiprocessor mode
OB 254, 255 Copy/duplicate DB and DX data blocks from memory card to user memory
These special functions are described in detail in Chapter 6.
Table 2-5 Overview of the organization blocks of the CPU 948 for special functions
Program, Organization and Sequence Blocks
CPU 948 Programming Guide
2 - 22 C79000-G8576-C848-04
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