Siemens SIMATIC ET 200S Manual page 550

Response time
The response time (t
output values in internal memory until the specified value is obtained at the analog
output – is, in the most unfavorable case, the sum of the cycle time and the settling
time. The most unfavorable case is when the analog channel is converted shortly
before the transfer of a new output value and is not converted again until after the
conversion of the other channels (cycle time).
Figure D-7 shows the response time of an analog output channel.
Figure D-7
D.7 Response times for a 4 IQ-SENSE electronic module
The response time of the 4 IQ-SENSE electronic module is specified as a cycle
time in the technical specifications.
D.8 Response times for process-related modules
The response times of the process-related modules are indicated as response time
or update rate in the technical specifications. See the ET 200S Process-Related
Functions manual
D-8
to t ) – that is, the time from the application of the digital
1 3
t
A
t
Z
t
t
2
1
t = response time
A
t = cycle time, corresponding to the processing time of the module
Z
and the conversion time of the channel
t = settling time
E
t = new digital value applied
1
t = output value transferred and converted
2
t = specified output value obtained
3
Response time of an analog output channel
t
E
t
3
ET 200S Distributed I/O System
EWA-4NEB780602402-09