PROFIBUS DP-Master

The Application Interface 295/315
6.4 The APM-Task
The APM-Task only offers packets regarding redundandancy function. Nevertheless you should be
aware of its existence as it is very important for performing internal processes. These concern for
instance such important things as:
• Diagnosis
• Routing of packets
• Database operations
• Data Exchange with Dual Port Memory.
• Error processing
To get the handle of the process queue of the APM -Task the Macro TLR_QUE_IDENTIFY() has to
be used in conjunction with the following ASCII-queue name
ASCII queue name
Description
" APM_QUE” Name of the APM-Task process queue
Table 181: FSPMM-Task process queue
The diagnostic and error messages which can be issued by the APM-Task are described in section
7.4 of this document.
In detail, the following functionality is provided by the APM -Task:
Overview over Packets of the APM-Task
No. of
section
Packet
Command
code
(REQ/CNF
or
IND/RES)
Page
6.4.1 PROFIBUS_APM_CMD_REDUNDANT_MODE_REQ/CNF – Set Master to
active/passive
0x3000/
0x3001
296
6.4.2 PROFIBUS_APM_CMD_REDUNDANT_MODE_IND – Indicate Status
changed of active Master
Table 182: Overview over the Packets of the APM-Task of the PROFIBUS DP Protocol Stack
0x3002 299
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010