Siemens SIMATIC ET 200S Operating Instructions Manual page 159

Error Detection
The program errors must be acknowledged. They have been detected by the
1Count5V/500kHz and are indicated at the feedback interface.
A channel-specific diagnosis is carried out if you have enabled group diagnostics in your
parameter assignment (see the
The parameter assignment error bit is acknowledged by means of correct parameter
assignment.
Figure 3-21
In the case of continuous error acknowledgment (EXTF_ACK=1) or at CPU/Master Stop, the
1Count5V/500kHz signals errors as soon as they are detected and resets them as soon as
they have been eliminated.
Technological Functions
Operating Instructions, 02/2007, A5E00124867-05
ET 200S Distributed I/O System
Error Acknowledgment
1Count5V/500kHz
3.6 Count Modes
Manual).
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