GE Medium Voltage GP Type G Drives, 2300 V manual Diagnostic variables, Connection ok indications

Diagnostic variables

The following table specifies variables that indicate the LAN health and status for the LAN Configuration and Health function.

Variable	Description
LAN connection ok	Indicates that the health of the LAN connection is
	good, such that the LAN watchdog function is
	satisfied.
LAN commands OK	Indicates that the health of the LAN references is
	good, based upon detection of two successive LAN
	connection ok indications.
Heartbeat ref, lan	LAN heartbeat signal that proceeds from the
	application layer to the local device, used locally for
	LAN heartbeat trip) and LAN heartbeat alarm)
	detection, and as the source of the reflected
	Heartbeat fbk, lan signal.
Heartbeat fbk, lan	Local device reflection of the Heartbeat ref, lan
	signal that is sent back to the application layer.
Sys ISBus error cnt	Counter signal which provides an indication of the
	rate of occurrence of ISBus fault conditions.
Sys ISBus error reg	Bit-coded value of the last ISBus fault detected;
	each bit indicates a particular ISBus fault seen by
	the control.
Frame PLL OK status	Boolean signal indicating the lock status of the
	Frame Phaselock Loop.
FPLL Phase error	Phase error signal for the Frame Phaselock Loop.
	Scaling is per-unitized such that unity corresponds
	to the full frame period; signal values range from
	minus one-half to plus one-half.
FPLL Freq Output	Frequency adjustment output signal for the Frame
	Phaselock Loop. Scaling is per-unitized such that
	unity corresponds to the full frame period; signal
	values range from minus output limit to plus output
	limit.

Function description

Determining the integrity of the LAN interface involves several communication layers, and may vary depending upon the specific communication options in use. The Innovation Series Drive has two levels of validation available: LAN watchdog and LAN heartbeat. Status information is conveyed to the user and/or application by status signals and fault declarations.

GEH-6385 Reference and Troubleshooting, 2300 V Drives Chapter 3 Paramters/Functions • 3-37