Siemens SIMATIC ET 200eco PN - Response times for analog input device and output device; Response times for analog input device

ET 200eco PN
Operating Instructions, 08/2016, A5E01250250-AJ
258
Response times for analog input device and output
device
F
F.1
Response times for analog input device
Conversion time
The basic conversion time depends directly on the conversion method of the analog input
channel (integrating method, instantaneous value conversion). For the integrating conversion
method, the integration time is included directly in the conversion time. The integration time
depends on the interference frequency suppression.
For information on the basic conversion times and additional processing times of the
individual analog devices, refer to the technical data of the corresponding analog I/O device.
Cycle time
The analog-digital conversion and the transfer of the digitized measured values to memory
or to the backplane bus take place sequentially. In other words, the analog input channels
are converted one after the other. The cycle time, that is, the time until an analog input value
is converted again, is the sum of the conversion times of all the activated analog input
channels of the analog input devices. You should deactivate unused analog input channels
during parameter assignment in order to reduce the cycle time. The conversion and
integration time for a deactivated channel is 0.
The figure below provides an overview of the cycle time elements of an n-channel analog
input device.
Figure F-1 Cycle time for analog input devices
Settling time
See Smoothing .