Siemens Simatic S7-400 - Page 19

Warranty, Liability and Support
Time switch based on the S7-300/400 CPUs with simple HMI system
including radio-controlled clock connection
Rev. B - final 19.07.2002 19/84
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BID21669756_Zeitschaltuhr_einfach_DOKU_v20_e.doc
HMI with OP3
The OP3 is a text-based display of the lower performance range. A
maximum of 2 lines at 20 characters each can be operated and monitored
at once on the device.
An example (one-day time switch) of the HMI interface at OP3 is illustrated
below.
The upper section of the illustration gives the input parameter, the lower
section the output parameter.
Control
p
arameter
Output
Error
Switch-on time
Switch-off time
Details on
current
system time
Fig. 2-9 HMI interface for the one-day time switch at the OP3
Enable Clock:
The parameter is used for enabling or disabling the clock.
Reset Output:
The Reset parameter is used for resetting the output of the clock when
problems occur.