Hitatchi Seiki rs232

Hey guys

Ht20sii Seicos L multi screen , yasnac Lx3 control

Struggling to get the rs232 to input a program.
I don’t see any options or settings on the NC Side, only place I can find is via editing, NC Prg input, on the multi side of the control.
I’ve played with baud rates, data and stop bits like they're lottery numbers but nothings talking.
Any advice is appreciated ! I’m not sure what I’m missing.

Still haven’t solved my issue but these are the params/ settings for the LX3 that I’ve found and figured out.
If anyone has any input it’s much appreciated.

Param #6003
D7 = 1 tape device uses com module ( 0=PTR )
D6 =0 rs232 ( 1 rs422)

D5,4: ( 5,4 =0,1 output port# rs232#1)
(5,4=1,0 output port# rs232 #2)
D5 =0
D4 = 1

D3 = 1 (0 eob is set LF only )( 1=CRLF )
D2 = 0

D1,D0: ( 0,1 input port # rs232#1)
( 1,0 input port# rs232#2)
D1 = 0
D0 = 1


Tape reader = port 2
Rs232c = port 1
Seiki don = output 1 , input 2 D0,D4

Param 6026,6028 : NC rs232 port1 : baud…ext
Param 6027,6029 : multi rs232 port2 : baud…ext

Param 6022 D1, D0 = 0,0 : parity enabled for input/output

Param 6021 :
DR ( Data set ) , ER ( data terminal ready) ,
CD ( Data receiving carrier detection)
Usually the previous are not used by the NC except when param 6021 D4=1 a DR interlock is added.

Param 6002 D7 = 1 punches out tape code with iso code

Param 6000 D7 = 1 outputs ISO data, 0 = EIA


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