Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 33/84
Copyright © Siemens AG 2005 All rights reserved
BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
Basic data/parameterizability:
RAM requirements:
week: 4750 bytes
Instance DB: 48 bytes
The parameter “Time_To_Check“ is a structure of the “week_udt“ (UDT2)
type. It contains:
• Start day
1 to 7: Sunday to Saturday
8: Monday to Friday
9: Saturday to Sunday
• Start hour, start minute, start second summarized as “starttime” with
structure of the “times” (UDT6) type
• End day
1 to 7: Sunday to Saturday
8: Monday to Friday
9: Saturday to Sunday
• End hour, end minute, end second summarized as “endtime” with
structure of the “times” (UDT6) type
If the parameter “Start day” has a value between 1 and 7, only a value
between 1 and 7 must be input at the end day as well. If the parameter
“Start day” equals 8 or 9, only 8 or 9 must be input at the end day as well.
4.3.4 One-month time switch
The block for the one-month time switch “month” FB122 is parameterized
as illustrated in the figure below. Data block DB122 is used as instance
data block:
Fig 4-6 Configuration “one-month time switch”
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