SETARB (ul_pccns)

	SETARB(iarb.i2.r)

	This routine sets the crate arbitration value for following
	calls to the CAMIO and MCAMIO routines.  Bits 0-3 are the
	RNRB, RCRB, SNR, and SCR bits respectively.

	This function requires the following include files:

	ul_pccns_h:mlib_h

	Related functions:

	CAMIO, MCAMIO, SETCS, SETTRY