Siemens SIMATIC ET 200AL - Settling and Response Times of Analog Output Modules

What you should know about analog technology
2.18 Settling and response times of analog output modules
Analog value processing
52 Function Manual, 06/2014, A5E03461439-AC
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
A
) is the sum of application time (t
X
), conversion time (t
W
) and settling
time (t
E
):
t
A
= t
X
+ t
W
+ t
E
Settling and response times of analog output modules
t
A
Response time
t
X
Application time
t
Z
Module cycle time
t
W
Conversion time
t
E
Settling time
t
1
New digital output value is available in the internal memory of the module
t
2
Module activates the digital output value and starts conversion
t
3
Module ends conversion at the terminal of the analog output channel and outputs the analog
signal
t
4
Signal has settled and the specified analog output value has been reached (residual error 1 %)
Figure 2-22 Settling and response time of an output channel