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3.5 L_CanDSxOpenHeartBeat − Initialisation of "Heartbeat"

Function library LenzeCanDSxDrv.lib

Functions/function blocks

3−6

LenzeCanDSxDrv.lib EN 1.2

3.5 L_CanDSxOpenHeartBeat − Initialisation of "Heartbeat"

Function

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".

This function is used to initialise the "Heartbeat" monitoring mechanism of the CanDSx driver.

· For initialisation, the transfer parameter bOpen must be TRUE.

· The actual monitoring is implemented by means of the FB L_CanDSxHeartBeat. (^ 3−7)

· Use the function L_CanDSxCloseHeartBeat to deactivate the "Heartbeat" monitoring

mechanism.

(^ 3−9)

Note!

It is not permitted to use the two monitoring mechanisms simultaneously!

If the transmission cycle time selected for the "Heartbeat" message of the bus device to be

monitored is unequal zero, the "Heartbeat" mechanism will have priority over the "Node Guarding"

mechanism.

Declaration

BOOL L_CanDSxOpenHeartBeat (bOpen);

Transfer parameters Data type Information/possible settings

bOpen Bool Initialisation of "Heartbeat".

TRUE The "Heartbeat" monitoring mechanism of the CanDSx driver is initialised.

Return value Data type Value/meaning

Bool Status

TRUE The "Heartbeat" monitoring mechanism has been initialised.

FALSE A The "Heartbeat" monitoring mechanism has not been initialised.

– Remedy: Call the function with transfer parameter bOpen = TRUE.

B The function L_CanDSxOpenNodeGuarding was activated before ("Node

Guarding" is activated).

– Remedy: Call the function L_CanDSxCloseNodeGuarding with transfer

parameter bClose = TRUE (deactivate "Node Guarding").

Example

Calling the function in ST:

bReturnOpenHeartBeat := L_CanDSxOpenHeartBeat(bOpen:= TRUE);

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Lenze DDS Global Drive PLC Developer Studio Manual de usuario Pagina 18