hp_get_plot_limits (ul_scopes)

	status.i4.v = hp_get_plot_limits(dev_address.i4.v, channel.i4.v,
					 v_max.r4.r, v_min.r4.r,
					 x_max.r4.r, x_min.r4.r) 

	This routine returns X and Y minimum and maximum values
	for trace data for a channel of an HP 54504 two or four
	channel scope. A call to hp_get_waveform will return
	the actual trace data.

	dev_address	address of scope
			(a previous call to 'gpib_select' will have to be
			 made to establish communication with the correct VME)
       channel		scope channel to request data for: 
			(HP_CHAN1 -> Channel 1
			 HP_CHAN2 -> Channel 2
			 HP_CHAN3 -> Channel 3
			 HP_CHAN4 -> Channel 4)
	v_max		returns vertical maximum value from the scope
	v_min		returns vertical minimum value from the scope
	x_max		returns horizontal maximum value from the scope
	x_min		returns horizontal minimum value from the scope

	This function returns ACNET status values as follows:

	OK			success
	CBS_INVARG		invalid device address
	otherwise		other ACNET error

	This function requires the following include files:


	Related functions:

	hp_set_channel, hp_get_waveform, hp_set_display, hp_set_root,
	hp_set_timebase, hp_set_trigger, hp_set_utilities, hp_set_waveform

	C/C++ usage:

	int	status;
	int	dev_address = DEV_ADDRESS;
	int	channel = HP_CHAN1;
	float	v_max;
	float	v_min;
	float	x_max;
	float	x_min;

	status = hp_get_plot_limits(dev_address,channel,&v_max,&v_min,