Lenze EMF2141IB Manual de usuario descargar pdf (Pagina 13)

Technical d ata

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

actual value

Control word and setpoint reading 54 ms +56 ms t olerance

• Processing of parameter access if there

Read parameter 55 ms +48 ms tolerance

is a service

Pa ramete r 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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