Lenze EMF2141IB - Manual (Page 13)

Technical data
3-3
L
BA2141 EN 1.0
3.5 Communication times
The communication times depend on
•
the data transmission time which depends on
– the baud rate
– the user-data length
•
the processing time in the basic unit (see the following chapter)
Tip!
You will find more information about the data-transfer time in the documentation for your host
system.
3.5.1 Processing time in the basic unit
The processing time in the basic unit starts when a message arrives at the fieldbus module (action)
and ends with the response of the basic unit to this message.
Processing time 820X
Action Processing step Max. time required by the controller
• Writing of control word or setpoint, if the
value has changed Writing of status word and actual
value 200 ms +40 ms tolerance
• Alternating reading of status word and Control word or setpoint reading 27 ms +48 ms Toleranz g g
actual value
Control word and setpoint reading 54 ms +56 ms tolerance
• Processing of parameter access if there Read parameter 55 ms +48 ms tolerance g p
is a service
Parameter writing 108 ms +32 ms tolerance
Tab. 3-1 Processing time: 820X
Processing time: 821X / 8200 vector / 822X
Parameter data and process data are independent of each other.
•
Parameter data: 30 ms + 20 ms tolerance
•
Process data: approx. 3 ms + 2 ms tolerance
Processing time: 9300 servo inverter
Parameter data and process data are independent of each other.
•
Parameter data: approx. 30 ms + 20 ms tolerance (typical)
– The processing time can be longer for some codes
(see 9300 Manual).
•
Process data: approx. 3 ms + 2 ms tolerance
Processing time: Drive PLC / 9300 Servo PLC
Parameter data and process data are independent of each other.
•
Parameter data: approx. 30 ms + 20 ms tolerance
•
Process data depend on the process image.
The process image is an update of process data made after every task cycle.
3.5.2 Number of devices connected to the bus
The maximum bus size depends on
•
the baud rate used
•
the number of repeaters
For more detailed information see the documenation for the control system.
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