communication PV and ML 1200 dif comport

hi everyone;
I have just started with panelview and communication with ML 1200 DF1 232 comport 1, I made the net configuration appear in the picture, but the rslinxs cant see the Pv and ml1200 DF1, when i set the belden cable with next configuration on pic, the firts aic doesnt blinks the RS485 but the second in there are pv550 and ml1200 rs485, minidin and df1 are blinking

the cable belden is worng or ??
because if i concect the ml1200 to port 1 and pv on port 4 i can see then on rslinx on direrent drivers.

Migul V.
Thanks in advance.

The network you describe is ideal for DH485 protocol but will not work with DF1 Full Duplex protocol.

Post the exact part number of your PanelView 550, and I can tell you which protocol options you have.

hi ,
PV CAT 2711-t5a16l1 ser. b rev. b, ok I ave to make a DH485 om ML1200 is easier but how can I switch the protocol on PV ???
the panel view has 2 rsr conectors "Rs-232 and rs232(DF1) I am connecting on DF1.

Ken the belden protolcol its ok??, the way i made the conecctions on the belden config picture.