hp54600_get_plot_limits (ul_scopes)

	status.i4.v = hp54600_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) 

	Returns  x and y min and max values to trace data for a channel of an 
		 HP 54504 two or four channel scope. A previous call to 
		 hp_get_waveform() will return the trace data.  The limits 
		 will be scaled to the eng units of mill, micro and nano
		 if the option is taken.

	dev_address	address of scope; A previos call to gpib_select()
			will have to be made to establish communication 
			to 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

	scale		Scale limts to units of mill,micro and nano
	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:

	CBS_OK			success
	CBS_INVARG		invalid device address
	otherwise		GAS error

	This function requires the following include files:

	ul_scopes_h:hpdefs_h

	Related functions:

	hp54600_display_pmem, hp54600_get_plot_limits, hp54600_get_pmem,
	hp54600_get_waveform, hp54600_message, hp54600_set_acquire, 
	hp54600_set_channel, hp54600_set_display, hp54600_set_timebase,
	hp54600_set_trigger, hp54600_set_waveform, hp54600_store_pmem