Lika XAC77 FB, User Manual

Page: 50 / 54

XAC77 Profibus-DP
®
6.7 DDLM_Slave_Diag
The Master device can send a request for diagnostic information at any time to
the Slave device.
This encoder provides 16-byte diagnostic information. Diagnostic information
consists of two parts: a standard diagnostic information (bytes 0 … 5) and an
extended diagnostic information (bytes 6 … 15). The standard diagnostic
information complies with guidelines contained in publication “Profibus
specification – Normative parts according to the European Standard EN 50 170
volume 2”. While the extended diagnostic information contains the device
related encoder diagnostic information; the DP-Slave specific diagnostic is
entered in this area. The extended diagnostic information complies with
specifications contained in publication “Profibus-DP Profile For Encoders”. The
length of the extended diagnostic information for encoder is specified in byte 6
of the diagnostic message.
16-byte diagnostic information:
Figure 2 - 16-byte Diagnostic information
Byte Description Byte Description
0 Station_Status_1 8 Operating status
1 Station_Status_2 9 Encoder type
2 Station_Status_3 10 MSB
Singleturn resolution
3 Master_Add 11
4 MSB
Ident_Number
12
5 LSB 13 LSB
6 Extended diagnostic header
14 MSB
Number of distinguishable
revolutions 15 LSB
7 Alarms
Station_Status_1
Byte 0. The first 5 bytes are defined in the “Profibus specification” document in
compliance with the European Standard EN 50170 volume 2. For any
information on the meaning of the individual bits in the
Station_Status_1 byte
refer to the “Profibus specification” document.
MAN XAC77 PX I_E 1.0.odt 50 Profibus® interface