PROFIBUS DP-Master

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• Invalid_Slave_Response
This bit indicates that the response of the slave was invalid or not plausible. An operating slave
always sets this bit to 0.
• Prm_Fault
This bit indicates that the last received parameter telegram was defective or incorrect.
• Master_Lock
This bit indicates that the slave has been parameterized by another master, so this master is
not permitted to control the requested slave. An operating slave always sets this bit to 0.
Octet 2: Station Status_2
D7 D6 D5 D4 D3 D2 D1 D0 Description
x
Prm_Req
x
Stat_Diag
x 1
x
WD_On
x
Freeze_Mode
x
Sync_Mode
x
Reserved
x
Deactivated
Table 42: Octet 2: Station Status_2
The bits of octet 2 have the following meaning:
• Prm_Req
This bit indicates that the slave requires new parameterization and configuration As long as a
new parameterization has not been performed this bit remains set to the value ‘1’.
• Stat_Diag
This bit (statistical diagnosis) indicates that the master needs to fetch diagnostic information
from slave, until this bit is released. If the slave is not able to deliver valid output data, it will set this
bit.
• Fixed 1
This bit is always set to the value ‘1’ indicating DP V1 operation.
• WD_On
This bit indicates that the watchdog timer supervision mechanism for the slaves is activated.
• Freeze_Mode
This bit indicates that the slave has received a ‘Freeze’ command and since then no ‘Unfreeze’
command.
• Sync_Mode
This bit indicates that the slave has received a ‘Sync’ command and since then no ‘Unsync’
command.
• Reserved
PROFIBUS DP-Master |
DOC061001API12EN | Revision 12 | English | 2010-12 | Released | Public © Hilscher, 2006-2010