Settling And Response Times Of Analog Output Channels - Siemens SIMATIC S7-300 Manual

Representation of the analog values of analog modules

5.6 Settling and response times of analog output channels

5.6 Settling and response times of analog output channels
5.6
Settling time
The settling time (t
level at an analog output, is load-dependent. We therefore distinguish between resistive,
capacitive and inductive load.
For information on settling times as a function of load at the various analog output modules,
refer to the technical data of the relevant module.
Response time
The worst case response time (t
output values to internal memory, and the signal settling time at the analog output, may be
equivalent to the total of cycle time plus settling time.
The worst case scenario is given, when the analog channel has been converted immediately
before a new output value is transferred, and is not converted again until all other channels
have been converted (cycle time.)
Overview of the settling time and response time of analog output modules
t
A
t
C
t
S
t
1
t
2
t
3
5-30
to t ), i.e. the time expiring until a converted value has gained a specified
2 3
Response time
tC = cycle time, corresponds to n x conversion time (n = activated channels)
Settling time
a new digitized output value is available
Output value accepted and converted
the specified job value will be reached
to t ), i.e. the time expiring between the input of digital
1 3
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04