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vacon • 12
CANopen protocol description
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
3.3.2
Node guarding protocol
Node guarding protocol is a NMT master driver protocol, where the master sends a remote
transmission request, which is answered by the slave. The slave response includes one data byte
that consists of a NMT slave state, and a toggle bit that toggles every response.
NOTE!
The CiA application note 802 recommends that the node guarding protocol should not be
used, because of different handling of RTR frames in CAN controllers.
OPTE6 option board does not have a hardware-triggered automatic response to the RTR frame. RTR
information is handled by software, and the response data always consists of updated information.
3.3.3
EMCY object
Option board works as an EMCY producer. The EMCY object is transmitted when a fault occurs in
the drive or option board. To switch off the EMCY producer, disable the EMCY COB-id by writing MSB
to 1 (object 0x1014).
When an error occurs, the EMCY message is transmitted
with the current value of the error
register
and the error code is inserted into the pre-defined error field list. The newest error code is
Table 10: Node guarding RTR frame (remote request)
CAN ID
LENGTH
RTR
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
0x700 +
Node ID
0x0
1
Table 11: Node guarding response
CAN ID
LENGTH
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
0x700 +
Node ID
0x1
t
Status
Table 12: Node guarding slave status
Status
Value
Description
0x4
Stopped
0x5
Operational
0x7F
Pre-operational
Table 13: Node guarding related objects in OD
Index
Description
0x100C
Guard time
0x100D
Life time factor
Summary of Contents for CANopen OPTE6
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