Startup For Time Synchronization/Time Stamping - Siemens SIMATIC ET 200M Manual

Startup for Time Synchronization/Time Stamping of Signal Changes
Error message to DP master;
digital input signals are not time
stamped.
Does not impair "normal" data
transfer with the DP master.
Figure 6-4

Startup for time synchronization/time stamping

Distributed I/O Device ET 200M
EWA-4NEB780600602-06
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Startup is completed as in
Figure 6-3.
The IM 153-2 is ready for data
transfer with the DP master.
Are suitable
time stamping parameters
No
available
for configuration?
Yes
Is
the clock
set in the
IM 153-2?
Yes
Create startup data:
Read the states of the configured
digital inputs;
process interrupt to DP master, so
that the message buffer is read
Monitoring of the configured digital
inputs: In the case of a change, the
message and entry are created in the
message buffer
Diagnosis of the time frame:
In the event of a failure or a time jump
greater than the permissible tolerance,
a special message is generated and
an entry made in the message buffer
Process interrupt to DP master, so
that the message buffer is read
Commissioning and Diagnostics
Clock in the IM 153-2
Read time frame
Set the IM 153-2 clock
Current time
No
Time is set to
01.01.1984; 00:00
Redundancy?
Redundancy?
Redundancy?
In a redundant configuration, the
passive IM 153-2 always has an
image of the time stamping
messages.
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