Following up on the results of my searching around.  The FANUC A860 reader
with A20B controller (the normal set up) has a 50 pin output port.  There
is a device one can buy that receives the signal from the FANUC's 50-pin
port and converts to into 25-pin RS232.  The device is called a behind the
tape reader or BTR.  There are models of BTR made for FANUC.  I found the
Memex MX1000 and MX1100, Sanyo RLC174 and DOSTEK 440A.  I am sure there are
more.
So...one needs some sort of BTR to make the FANUC A860 (also referred to as
FANUC 6) connect to a PC for the purpose of archiving papertapes.
There are vendors who sell these used/new.  
fanucparts.com/btr/
texas-industrial.com and others.
Bill
On Tue, May 12, 2020 at 4:55 PM Al Kossow via cctech <cctech at classiccmp.org>
wrote:
  On 5/12/20 1:42 PM, Bill Degnan wrote:
  Al,
 Here is the Ebay auction, I hope the manual is included assuming the 
 50-pin port
is the output port.
  
 ? there isn't a manual shown
 the 50 pin connector is the I/O
 you can find descriptions of the pinout online from people making paper
 tape reader replacement devices