status.i4.v = tlg_supercycle_length(supercycle_len.r4.r [,source.e.v])

	This routine returns the length of the current supercycle in seconds.

	supercycle_len	returned supercycle length in seconds
	[source]	desired source for the timeline data
			(TlgUti::Oper -> active timeline front end (default),
			 TlgUti::Test -> test timeline front end)

	This function returns status values as follows:

	OK			success
	CLIB_TIMEOUT		DPM returned DPM_PEND status.
	DIO_xxx			failure reading TLG module

	This function requires the following include files:

	tlguti_h, cbslib_h, acnet_errors_h

	Related functions:

	tlg_cycle_length, tlg_min_cycle_length_c, tlg_max_cycle_length_c,
	tlg_event_times_c, tlg_get_reset_info_c

	C/C++ usage:

	float	supercycle_length;

	int status = tlg_supercycle_length(&supercycle_length);