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Integral Blocks
11.3
DB1: Initializing Internal Functions
The CPU has functions which you can set to your own requirement. For example, you can initialize
the following:
•
Integral hardware clock (in the case of CPU 943 and CPU 944 with two interfaces each)
•
Data interchange over SINEC L1
•
Call interval for time-controlled program execution (OB10 to 13)
•
System characteristics (e.g. scan time monitoring)
•
Address for parameter error code.
You can initialize these functions in data block DB1.
11.3.1 Configuration and Default Settings for DB1
To make it easier for you to assign parameters, data block 1 is already integrated in the pro-
grammable controller with preset values (default parameters). After performing an overall reset,
you can load the default DB1 from the programmable controller into your programmer and
display it on the screen:
0:
KS
='DB1 TFB: OB13 100 ; SDP:';
12:
KS
=' WD 500 ; END ';
19:
This default DB1 contains one parameter block each for the following functions:
•
Specifying the call interval for OB13; parameter block "
•
System characteristics (scan time monitoring); parameter block "
What Typifies a Parameter Block?
A parameter block contains all the parameters of one function; it always starts with a block
identifier followed by a colon. The colon must be followed by at least one space. The semicolon (;)
indicates the end of a parameter block. The parameters are contained between the block iden-
tifier and the semicolon (;).
11-46
Parameter block
identifiers
".
TFB:
".
SDP:
EWA 4NEB 811 6130-02b
S5-115U Manual
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