Lenze DDS Global Drive PLC Developer Studio Uživatelský manuál stáhnout pdf (Strana 11)

Function library LenzeCanDSxDrv.lib

Introduction

2.3 Monitoring mechanisms

2−3

LenzeCanDSxDrv.lib EN 1.2

2.3 Monitoring mechanisms

The CANopen communication profile (CiA DS301, version 4.01) specifies two optional monitoring

mechanisms to ensure the functionality of the system bus devices: "Heartbeat" and "Node

Guarding".

2.3.1 "Heartbeat"

The "Heartbeat" monitoring mechanism is a producer−consumer orientated method. Every bus

device can monitor the state of the other bus devices. A polling message is not required.

Request

Indication(s)

Heartbeat

Producer

Time

Heartbeat Producer Heartbeat Consumer(s)

Heartbeat

Event

Heartbeat

Consumer

Time

Indication(s)

Stopped

Operational

Pre-Operational

Boot-Up Event

reserved

s: State of the heartbeat producer:

127

· A bus device (producer) indicates its communication status by the cyclic transmission of a

"Heartbeat" message.

· The "Heartbeat" message can be received by one, more than one or all bus devices

(consumer) to monitor the corresponding bus device.

· Unless the monitoring bus device (consumer) receives the "Heartbeat" message from the bus

device to be monitored (producer) within the selected monitoring time

(HeartBeatConsumerTime), a "Heartbeat" event will be indicated.

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 25 26

Žádné komentáře

Lenze DDS Global Drive PLC Developer Studio Uživatelský manuál Strana 11