PV600 standard/classic: 2711-T6C16 FRN 4.10-4.xx connected to slc5/03-L532 16K memory OS300 Thru RS-232 DF1 ports on both i.e. PV600 and SLC 5/03.
Cable used 2711-NC13 9pin DB
Port settings: 19200, no parity, 1 stop bit, CRC, no handshaking. PV600 node 2, SLC 5/03 channel 0: node 9 decimal (tried node 1, node 2 before).
I can connect my laptop COM1 with 1747-CP3 to slc 5/03 thru RSlinx DF1 no problem and to PV600 RS232DF1 port with panel builder thru rslinx df1 direct no problem.
I CAN'T get them talking to each other