								6/20/90


	    Front End Support for Kinetic Systems 3527 SAM

			B. Lublinsky / M. Glass



     The Kinetic Systems 3527 (SAM) is a 32-channel autoranging A/D
converter that converts 32 analog voltages into PDP format floating
point numbers.

     The front end supports only Reading and Analog Alarm properties.
The SSDN for both properties looks like:

	    +----------------------------------------------+
	    | 76 (hex)             |  FF ( hex)            |
            +----------------------------------------------+
            | 'N' slot             |  'C' crate number     |
            +----------------------------------------------+
            |                      | channel ( 0 - 31 )    |
            +----------------------------------------------+
            |                      0                       |
            +----------------------------------------------+

     In Dabbel this looks like:

	SSDNHX READNG (76FF/nncc/00aa/0000)
	SSDNHX ANALBL (76FF/nncc/00aa/0000)

			cc - Camac crate
			nn - Camac slot
			aa - channel number (0-1F)

     Reading property data is 4 bytes long, already converted (by the
hardware) to PDP floating point format.  Note that the low order (least
significant) bits of the reading have special meanings assigned by the
SAM.  The front end does not clear these bits.

The reading property PDB should have the following three fields fixed:

	PDB READNG ('VOLT', '?', 22, ?, 4, ...)
                       ^          ^     ^
                       |          |     |
                       |          |     +--- data length = 4 bytes
                       |          +--------- primary transform = NULL
                       +-------------------- primary units = volts

     The front end will refuse to read the device at a rate faster than
3 Hz.  The PRO READNG for a 1 Hz default (the normal pattern) will look
like:

	PRO READNG (4, 4, 60)

     There should also be an analog alarm EMC like this:

	EMX (0532/nncc/00aa/0000)

     Note that the "32" in the low order byte of the first word of the
EMC is the front end node number, which is 50 (decimal) for the CDF
front end.

     The analog alarm PDB should note that the data length is 4 bytes,
and it should be set up for min/max checking.

     The DABBEL entry for one of these devices will thus contain:

	ADD/MOD
	EMX
	SSDNHX READNG
	PRO READNG
	PDB READNG
	SSDNHX ANALBL
	PRO ANALBL
	SAVE (optional)
