Lenze EMF2102IB Manual do Utilizador descarregar pdf (Página 11)

Technical data

3-3

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3.5 Communication times

The time required for communication can be displayed as a sequence of processing steps (with

corresponding times).

Step Explanation

t0 User program in host starts request t o the controller (e.g. controller enable with C0040=1)

t1 Software driver (e.g. LECOM-S5) in host converts request data into LECOM-A/B protocol V2.0 and starts the transmission.

t2 Serial data transfer to the controller (telegram time)

t3 Data receipt of t he controller: Processing of request and start of response

t4 Response data to host are being transmitted (telegram time)

t5 Software driver in host evaluates the response, i.e. the response is converted into the format of the user program.

t6 Application program in host gets the result

The time sections t2, t4 and t3 are described in detail in the following:

Telegram time (t2 + t4)

The telegram time comprises the serial communication from the host to the controller (t2) and the

corresponding response from the controller (t4). The time depends on the telegram type and the

baud rate set under C0125.

Baud rate [bits/s] (C0125)

1200 2400 4800 9600 19200

Single character transmission time [ms]

(1 character = 10 bit; see chapter 3.2)

8.4 4.2 2.1 1 0.52

Telegram type SEND (sends data to drive):

Baud rate [bits/s] (C0125)

1200 2400 4800 9600 19200

t2: Standard [ms] (parameter value = 9 characters) 150 75 37.5 18.8 9.4

Addition for extended addressing [ms] 41.6 20.8 10.4 5.2 2.6

Telegram type RECEIVE (reads data from drive):

Baud rate [bits/s]

1200 2400 4800 9600 19200

Standard [= t4]

(Parameter value = 9 characters) [ms]

166.7 83.3 41.7 20.8 10.4

Addition for extended addressing [ms] 83.3 41.7 20.8 10.4 5.2

If more or fewer than 9 characters are transmitted as telegram data, take the corresponding

character-transmission times into account.

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