Appendix
A.4 Response times
ET 200pro distributed I/O system
Operating Instructions, 03/2013, A5E00335544-08
511
Response time
The worst-case response time (t
1
to t
3
), meaning the expiring between the input of digital
output values to internal memory and the settling time of the specified value at the analog
output, is equivalent to the total of the cycle time plus the settling time. The worst-case factor
is given if the analog channel was converted immediately before a new output value was
transferred, and is not converted again unless all other channels have been converted (cycle
time).
The figure below shows the response time of an analog output channel.
t
A
Response time
t
C
Cycle time, equivalent to the processing time of the module plus the channel conversion time
t
S
Settling time
t
1
New digital output value is available
t
2
Output value accepted and converted
t
3
Specified output value reached
Figure A-34 Response time of an analog output channel
See also
Analog electronic module 4 AO U High Feature (6ES7145-4FF00-0AB0) (Page 408)
Analog electronic module 4 AO I High Feature (6ES7145-4GF00-0AB0) (Page 414)
