Siemens Simatic ET200pro, Руководство по эксплуатации

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Appendix
A.4 Response times
ET 200pro distributed I/O system
510
Operating Instructions, 03/2013, A5E00335544-08
See also
Analog electronic module 4 AI U High Feature (6ES7144-4FF00-0AB0) (Page 383)
Analog electronic module 4 AI RTD High Feature (6ES7144-4JF00-0AB0) (Page 395)
Analog electronic module 4 AI I High Feature (6ES7144-4GF00-0AB0) (Page 389)
4 AI TC High Feature analog electronic module (6ES7144-4PF00-0AB0) (Page 401)
A.4.7 Response times of analog output modules
Conversion time
The conversion time of the analog output channels includes the time required to apply the
digitized output values from the internal memory plus the digital-to-analog conversion.
Cycle time
Conversion of the analog output channels of the module is based on a specific execution
time plus the sequential conversion time at Channels 0, 1, 2 and 3.
The cycle time, i.e the time required to reconvert an analog output value, is equivalent to the
cumulative conversion times of all enabled analog output channels plus the processing time
of the analog output module.
The figure below provides an overview of the factors determining the cycle time of an analog
output module.
Figure A-33 Cycle time of analog output modules
Settling time
The settling time (t
2
to t
3
), meaning the time between the input of a converted value and its
output at the analog output, is load-dependent. A distinction must be made between
resistive, capacitive, and inductive loads.