11.8 Guarding
Guarding response:
The inverter responds to every guarding request of the PLC. This is used by some
PLCs when powering on to search for available devices. This response is done always
independent of the settings of objects 0x100C/0
Guard Time
and 0x100D/0
The Guarding is set whenever objects 0x100C/0
Guard Time
and 0x100D/0
Factor
are both unequal to zero. The resulting guarding time is
Guard Time
x
Factor
. Guarding is activated after setting the objects and
on reception of the first
guarding request.
Guarding fault behavior:
If the inverter does not receive a guarding request within the specified guarding time
a guarding event is triggered. The inverter's reaction to this guarding event is defined
by objects 0x6007
abort connection option code
and 0x1029
error behavior
.
The PLC sends via a RTR (Remote Transmission Request) a
Identifier 0x700 (= 1792) + Node-
ID (no data bytes). This remote frame is answered
by the inverter with the same Identifier and one data byte. The data byte contains
a
toggle bit and the NMT state of the inverter.
0x700 (=1792)+ Node-ID RTR
Toggle bit toggled on each transmission (first transmission t = 0)
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