Lika XAC80 PB, Руководство пользователя, Страница: 40 / 60

XAC80 Profibus-DP
®
Class 2(+VEL)
provides all the Class 1 and the Class 2 functions and additional
velocity-related functions:

transmission of the velocity value (see the Position and velocity values
parameter on page 50);

setting of the unit of measurement for velocity (see the
Velocity measure
unit
parameter on page 48).
7.3 Modes of operation
Profibus-DP devices allow operation using different communication modes (see
the Figure below):
NOTE
All parameters -except
Preset value
- are transmitted in
Set_Prm
mode.
Preset value
is transmitted only in
Data_Exchange
mode.
7.3.1 Types of communication
Transmission of data between the Master and the Slave is carried out using the
following types of messages:

DDLM_Set_Prm:
It is used to configure the Slave. This communication mode is active
immediately after the power is turned ON and used to send parameters
from the Master to the Slave (see the “7.4 DDLM_Set_Prm“ section on page
41).

DDLM_Chk_Cfg:
It sets the number of bytes used for data transmission in Data_Exchange
mode (see the “7.5 DDLM_Chk_Cfg“ section on page 49).
MAN XAC80 PB E 1.0.odt 7 - Profibus® interface 40 of 60
Power-ON
Wait_Prm
Wait_Cfg
Data_Exchange
Chk_Cfg_OK
Set_Prm_OK
Set_Prm_FAIL
Chk_Cfg_FAIL
Init_OK