TS16 with no RD signal


We Have 3 TS-16 (rp, ts, ps), attached to a Unix Box 5.07, all of our devices are RS-232, we been working with this setup for 2 years, but… about 3 months ago, one of our devices miss the communication with the TS, everything seems to be right but the device just don´t get a signal., i have changed the port to still working(from ttyts07 to ttyts08). After 2 weeks we miss the ttyts08 and now the 09 ???, the only thing i have found it´s that when i check the TS port with a signal tester, the RD led is off and in the other ports is red… what could be happend ?.. how do I reset the Ports so we can have the RD signal again ?.

Note: the tty should be disabled so the aplication can work.

This problem could be caused by the port going into a flow control state it can’t recover from, or possibly the port is blown out.

Since you’re using the Realport driver, do a “ditty -a /dev/ttyts09” and see how flow control is setup. It should be set as ixon -ixany ixoff if set correctly. If not, how is this setup?

luxmfg:/# ditty -a /dev/ttyts07
onstr \033[5i offstr \033[4i term ansi
maxcps 100 maxchar 50 bufsize 100 edelay 100
-forcedcd fastcook -altpin -fastbaud (9600) -printer
eia232 -rtspace -dtrpace -ctspace -dsrpace -dcdpace
startc = 0x11 stopc = 0x13
-aixon astartc = 0x0 astopc = 0x0
speed 9600 baud; ispeed 9600 baud; ospeed 9600 baud; line = 0(tty);
intr = DEL; quit = ^; erase = ^H; kill = ^U; eof = ; eol = ^M;
swtch = ; susp = ; start = ^Q; stop = ^S;
parenb -parodd cs7 -cstopb -hupcl cread clocal -loblk
-ortsfl -ctsflow -rtsflow
-ignbrk -brkint -ignpar -parmrk -inpck istrip -inlcr -igncr -icrnl -iuclc
-ixon -ixany -ixoff
-isig -icanon min = 255 time = 13 -xcase -echo -echoe -echok -echonl -noflsh
-iexten -tostop -xclude
-opost -olcuc -onlcr -ocrnl -onocr onlret -ofill -ofdel
-autoe -ed_emacs -ed_vi -ed_history

I have compared with one that is working fine, and i haven´t found any difference… ???

One more thing… could u recommend some surge protector…

Best Regards…

All flow control is turned off, so hopefully the device you have connected to the serial port doesn’t have flow control enabled either. Definitely something you’ll want to check.

As for discovering whether or not the serial port is functional.

To test loopback with the Realport:

To test the hardware itself (serial port on the Realport side must be closed/not enabled):