Lika XAC80 PB, Руководство пользователя, Страница: 49 / 60

XAC80 Profibus-DP
®
7.5 DDLM_Chk_Cfg
The Configuration function allows the Master to send configuration data to the
Slave for any check operation. The main purpose of this function is to set the
number of bytes used for the Data_Exchange as viewed from Master side.
Chk_Cfg message structure (1 byte):
bit 7 = Consistency (=”1”)
bit 6 = Word format (“0”=byte,“1”=word=4 bytes)
bit 5 and 4 = In/out data (“01”=Input, ”10”=output)
bit 3 … 0 = Length code
EXAMPLE
bit
7 6 5 4 3 2 1 0
Data
1 1 0 1 0 0 0 1 D1h
1 1 0 1 0 0 1 1 D3h
1 1 1 0 0 0 0 1 E1h
Class 1 and Class 2:
D1hex = 4 byte input
E1hex = 4 byte output Class 2(+VEL):
D3hex = 8 byte input
E1hex = 4 byte output
7.6 DDLM_Data_Exchange
This is the normal operation status of the system. The Slave (for both Class 1 and
Class 2) can transmit the
Position value
(and the speed value -
Position and
velocity values
- if Class 2+VEL is set) and receive the
Preset value
from the
Master. See also the
Exchange type
parameter on page 44.
Position value
when either Class 1 or Class 2 is set
(Encoder  Master)
Byte 1 2 3 4
Bit 31-24 23-16 15-8 7-0
Data 2 31 to 2 24 2 23 to 2 16 2 15 to 2 8 2 7 to 2 0
See also the
Exchange type
parameter.
It has a mandatory length of 32 bits and is right aligned in the data field.
This parameter contains the current position of the encoder.
If the scaling function is enabled, the output value is scaled according to the
scaling parameters (see
Scaling function control
on page 44).
MAN XAC80 PB E 1.0.odt 7 - Profibus® interface 49 of 60