Introduction; Ob 121: Set/Read System Time - Siemens CPU 948 Programming Manual

Introduction

6.1

Introduction

Table 6-1 Overview of the special functions available with the CPU 948
Block Function
OB 121 Set/read system time (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, 2, 3 and 4
OB 132 Roll-up ACCU
OB 133 Roll-down ACCU
OB 141 "Disable single cyclic timed interrupts" on/off
OB 142 "Delay all interrupts" on/off
OB 143 "Delay single cyclic timed interrupts" on/off
OB 150 Set/read system time
OB 151 Set/read time for clock-controlled interrupt
OB 153 Set/read time for delayed interrupt
OB 181 Test data block
OB 182 Copy data area
OB 200, 202 Functions for multiprocessor communication
203, 204, 205
OB 222 Restart cycle monitoring time
OB 223 Compare start-up modes in multiprocessor mode
OB 254, 255 Copy/duplicate DB and DX data blocks
6 - 4
The operating system of the CPU 948 provides you with special
functions which you can call if necessary with a conditional (JC OB x)
or an unconditional (JU OB x) block call. Organization blocks OB 100
to 255 are reserved for these special functions.
These functions are known as integrated special functions, since they
are a fixed part of the system program. As user, you can call these
special functions but cannot read or modify the corresponding
program.
The following table provides an overview of the existing special
functions.
Refer to
section/page
6.2/6 - 8
6.3/6 - 12
6.4/6 - 14
6.5/6 - 17
6.6/6 - 20
6.7/6 - 25
6.8/6 - 26
6.9/6- 27
6.9/6- 27
6.10/6 - 29
6.11/6 - 32
6.12/6 - 35
6.13/6 - 38
6.14/6 - 43
6.15/6 - 50
6.16/6 - 53
6.17/6 - 55
6.18/6 - 58
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6.20/6 - 60
6.21/6 - 61
CPU 948 Programming Guide
C79000-G8576-C848-04