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3
CANopen access procedure
Festo – GDCP-CMMP-M3/-M0-C-CO-EN – 1510b – English
41
NMT telegrams must not be sent in a burst (one immediately after another)!
At least twice the position controller cycle time must lie between two consecutive NMT
messages on the bus (also for different nodes!) for the controller to process the NMT
messages correctly.
If necessary, the NMT command “Reset Application” is delayed until an ongoing saving
procedure is completed, since otherwise the saving procedure would remain incomplete
(defective parameter set).
The delay can be in the range of a few seconds.
The communication status must be set to operational for the controller to transmit and
receive PDOs.
3.7
Bootup
3.7.1
Overview
After the power supply is switched on or after a reset, the controller reports via a Bootup message that
the initialisation phase is ended. The controller is then in the NMT status preoperational
(
chapter 3.6, Network Management (NMT Service))
3.7.2
Structure of the Bootup Message
The Bootup message is structured almost identically to the following Heartbeat message.
Only a zero is sent instead of the NMT status.
701
h
1
0
Identifier: 700
h
+ node number
Bootup message identifier
Data length