HEIDENHAIN PROFIBUS-DP (DPV2) - Manual (Page 51)

Alarms and warnings
51
6 Alarms and warnings
6.1 Alarm mechanism
There are three ways to get diagnosis information from the
PROFIBUS encoder:
• By a read parameter access to the Parameter 65001 where
information on the current status of the Faults and Warnings
and the support of the individual diagnosis functions can be
read out.
• By the evaluation of the Error bit in the Sensor Status word
G1_ZSW and additionally the evaluation of the Error code
transmitted in G1_XIST2.
• By the use of the Extended Diagnosis in the Diagnosis
telegram where the diagnosis objects are transmitted by the
Channel Diagnosis mechanism further described in this
chapter.
6.2 Channel related diagnosis
The encoder diagnosis is reported to the master as channel
related diagnosis if the alarm channel control bit is set. If the
Alarm channel is switched of only the first 6 bytes of the
diagnostic telegram are realized
(Diag.Ext_Diag = 0): Station_status_1, Station_status_2,
Station_status_3,
Diag_Master_Add and Ident_Number.
The diagnostic reason is entered in turns and the length of each
entry is 3 octets
Diagnostic function data type Value Comments Octet
number
Header Unsigned8 0x81 Identifier x 1
Channel Unsigned8 0x40 Input
channel 0
2
Type of diagnosis Unsigned8 See 6.3 3
Table 20 Channel related diagnostics