Settling And Response Times Of Analog Output Modules - Siemens SIMATIC ET 200AL System Manual

What you should know about analog technology

2.18 Settling and response times of analog output modules

2.18 Settling and response times of analog output modules
Settling and response times provide information on the delay of the output of a specified
analog output variable and its availability to the process.
Response time
The response time for a new output value is defined as the time between the input of a
digital output value to the internal memory of the module and the value to be output at the
analog output being reached (with a residual error of 1 %).
The response time (t
time (t
t = t
A
Settling and response times of analog output modules
t
A
t
X
t
Z
t
W
t
E
t
1
t
2
t
3
t
4
Figure 2-22
52
) is the sum of application time (t
A
):
E
+ t + t
X W E
Response time
Application time
Module cycle time
Conversion time
Settling time
New digital output value is available in the internal memory of the module
Module activates the digital output value and starts conversion
Module ends conversion at the terminal of the analog output channel and outputs the analog
signal
Signal has settled and the specified analog output value has been reached (residual error 1 %)
Settling and response time of an output channel
), conversion time (t ) and settling
X W
Analog value processing
Function Manual, 06/2014, A5E03461439-AC