GE General Electric Computer Accessories 2300 V User Manual

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When controlling a drive over a LAN, both the controller and the drive need to
monitor and react to changes in the status of LAN health. The heartbeat echo feature
in the drive provides a mechanism for this function.

The following illustrations indicate how the drive and controller obtain status on the
LAN integrity and possible configuration options.

Series 90-30

MCL

+

-

Reference

Feedback

Bit

1

Heartbear ref, lan

(Lan_Htbt_Ref)

Heartbear fbk, lan

(Lan_Htbt_Fbk)

Controller generates the
heartbeat and monitors the echo
of it from the drive

Drive reads the heartbeat signal
generated in the controller on
Lan_Htbt_Ref and echos it back
on Lan_Htbt_Fbk

Lan_Htbt_Ref

Lan_Htbt_Fbk

Drive can be configured to
monitor heartbeat on
Lan_Htbt_Ref and alarm or trip if
the heartbeat fails to transition

Lan_Htbt_Ref

Lan_Htbt_Fbk

MCL

+

-

Reference

Feedback

Bit

1

Heartbear ref, lan

(Lan_Htbt_Ref)

Heartbear fbk, lan

(Lan_Htbt_Fbk)

Innovation Series Controller auto
generates the heartbeat and
monitors the echo of it from the
drive in the # version of the
feedback signals

Drive reads the heartbeat signal
generated in the controller on
Lan_Htbt_Ref and echos it back
on Lan_Htbt_Fbk

Lan_Htbt_Ref

Lan_Htbt_Fbk

Drive can be configured to
monitor heartbeat on
Lan_Htbt_Ref and alarm or trip if
the heartbeat fails to transition