Application Software Components Required And Their "Product Features - Siemens SIMATIC S7 400 Application Description

Time switch based on the S7-300/400 CPUs with simple HMI system including radio-controlled clock connection
2.4

Application software components required and their "product features"

This application was produced using the following application software components:
Table 2-2 STEP 7 application software
Serial No. Name
1 Day (FB120)
2 Week (FB121)
3 Month (FB122)
4 Year (FB123)
Rev. B - final 19.07.2002
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Function description
The FB "DAY" checks, whether the current system time in the S7 CPU
is within the parameterized time range at the input parameters of the
block. If this is the case, the output is set to "1". Otherwise the output is
"0".
The FB "Week" checks, whether current system time and current day of
the week in the S7 CPU are within the parameterized time range at the
input parameters of the block. If this is the case, the output is set to "1".
Otherwise the output is "0".
The FB "Month" checks, whether current system time and current day in
the month in the S7 CPU are within the parameterized time range at the
input parameters of the block. If this is the case, the output is set to "1".
Otherwise the output is "0".
The FB "Year" checks, whether current system time and current date in
the S7 CPU are within the parameterized time range at the input
parameters of the block. If this is the case, the output is set to "1".
Otherwise the output is "0".
Technical data Ambient Conditions
– Language STL – S7-CPU
– OB1
– Storage
requirements:
610 bytes
– Instance DB: DB120
52 bytes
– Language STL – S7-CPU
– OB1
– Storage
requirements:
4750 bytes
– Instance DB: DB121
48 bytes
– Language STL – S7-CPU
– OB1
– Storage
requirements:
1054 bytes
– Instance DB: DB122
56 bytes
– Language STL – S7-CPU
– OB1
– Storage
requirements:
956 bytes
– Instance DB: DB123
56 bytes
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