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Communication times, Parameter setting, With communication module lecom−a (rs232) – Lenze 8200 motec frequency inverter 0.25kW-7.5kW User Manual

Page 65: 2 communication times

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Parameter setting

With communication module LECOM−A (RS232)

6−10

L

EDB82MV752 EN 5.2

6.3.1.2

Communication times

The time required for communication with the drive can be displayed as a sequence of time
segments. The communication times depend on the baud rate set in C0125:

Section

Active component

Action

t0

Application program in the host system

Starts request on the controller

t1

Software driver in the host system

Converts request data into the LECOM−A/B protocol and starts the transmission

t2

Communication (= serial transmission) to the controller (telegram run time)

t3

Controller

Processes the request and starts the response

t4

Communication response is transmitted (telegram run time)

t5

Software driver in the host system

Evaluates the response and converts it into the format of the application program

t6

Application program in the host system

Receives the result

Telegram run time (t2 + t4) [ms]

Baud rate [bits/s] (can be set with C0125)

1200

2400

4800

9600

19200

SEND telegram type
(sends data to the drive)

t2

Standard

(parameter value = 9 characters)

150

75

37.5

18.8

9.4

Addition for extended addressing

41.6

20.8

10.4

5.2

2.6

RECEIVE telegram
(reads data from the drive)

t4

Standard

(parameter value = 9 characters)

166.7

83.3

41.7

20.8

10.4

Addition for extended addressing

83.3

41.7

20.8

10.4

5.2

Runtime of single character

1)

per character [ms]

8.4

4.2

2.1

1

0.52

Processing time in the controller (t3)

t3 [ms]

Write codes

20

Read codes

20

1)

If the telegram contains less or more than nine characters, the transmission time changes by the values given.