Delta ASDA-A3 Series User Manual page 964

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ASDA-A3
Heartbeat
The Heartbeat mechanism is mainly to enable the producer to send packets to the consumer
periodically. The producer can be a controller or servo drive; on the other hand, a controller or
servo drive can also be the consumer.
If you use the controller to send the heartbeat and the servo drive as the consumer, you need to
set the consumer heartbeat time (OD 1016h) for the servo drive. When the servo drive does not
receive the heartbeat signal within the receiving time, it triggers the heartbeat event, meaning
AL180 is triggered. Consumer heartbeat time (OD 1016h) is defined as the time the servo drive
expects to receive a heartbeat. To start the Heartbeat mechanism, set the consumer heartbeat
time (OD 1016h) and then have the controller send the heartbeat signal. The consumer
heartbeat time (OD 1016h) must be greater than the producer heartbeat time which is set by the
controller. Since there are delays and other uncontrollable external factors in transmitting the
heartbeat message, you must retain a tolerance time for the transmission.
Heartbeat
producer
Heartbeat
producer
The S code is described as follows:
If you want to use the servo drive as the producer, then the heartbeat is sent by the drive. When
the controller does not receive the heartbeat signal within the receiving time, it triggers the
heartbeat event which corresponds to the alarm defined by the controller.
The servo drive can be the consumer and the producer simultaneously. In that case, you need
to set OD 1016h and OD 1017h at the same time, and the controller must be set as the
producer and the consumer as well.
COB-ID = 700h+Node-ID
Example of Node-ID = 1
Producer
heartbeat time
S
0
4
5
127
701h
S
701h
S
No signal
State
Bootup
Stopped
Operational
Pre-Operational
CANopen Mode
Heartbeat
consumer
Consumer
heartbeat time
(OD 1016h)
Heartbeat
consumer
Consumer
heartbeat time
(OD 1016h)
AL180
12
12-15

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