Lika XAC77 FB, User Manual

Page: 45 / 54

XAC77 Profibus-DP
®
DDLM_Set_Prm with Class 2 (+VEL)
Byte Parameter
0…9 Reserved for PROFIBUS
10
Operating parameters
bit 0 Code sequence
bit 1 Class 2 functionality
bit 2 Reserved
bit 3 Scaling function control
bits 4 ... 6 Reserved
bit 7 Exchange type
11…14 Counts per revolution
15…18 Total resolution
19 Velocity measure unit
20 Reserved
6.4.1 Byte 10 - Operating parameters
Bit Function bit = 0 bit = 1
0 Code sequence CW CCW
1 Class 2 functionality disabled enabled
2 Reserved
3 Scaling function control disabled enabled
4 ... 6 Reserved
7 Exchange type pos pos + vel
Code sequence
Code sequence sets the rotation direction of the encoder shaft and
consequently defines whether the position value output by the encoder
increases when the encoder shaft rotates clockwise (CW) or counterclockwise
(CCW). CW and CCW rotations are viewed from shaft end.
Class 2 functionality
Disabled = Encoder Class 1 is set.
Enabled = Encoder Class 2 (or VEL)) is set.
Scaling function control
When this option is disabled, device uses hardware resolution; when it is
enabled, device uses the resolution transmitted through bytes from 11 to 18
(
Counts per revolution and Total resolution ).
For a correct use of this function see sections “6.4.2 Bytes 11…14“ and “6.4.3
Bytes 15…18“.
MAN XAC77 PX I_E 1.0.odt 45 Profibus® interface