I have a few robotic manipulators from NakkaNippon Electric and I'm trying to communicate with them using RS232 without success. The robot model are microrobots 88-4 or 88-5.
I'm sending commands via COM port, but I can't received anything from the box. I'm using a USB-to-DB9 converter (FTDI) with a DB9-DB25 cable.
On the net, the only reference I have for the robot is from an old post from year 2000 that was from user @peterkneale.
If it can help, here is the link to the scanned PDF manual.
You can see the commands on page 23-24 of the pdf (page 21-22 in document).
Any advice would be grateful