Port Server TS: 0xFF characters are being doubled in Raw TCP/IP mode

Serial Servers & Infrastructure Mangement Portserver TS
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1

When using a Port Server TS in Raw TCP/IP mode from a Linux Host running a binary protocol (here SEMI E4 - SECS-I) characters of value 0xFF sent from an Equipment are sent twice to the host. This has been seen with Firmware 82000747_U and 82000747_W. The doubled characters are also logged when Port Logging is enabled.

Using the same Port Server with a RealPort Driver from a Windows Host does not exihibit this problem. The Port Server System mode is set to Latency.

Is there a setting to circumvent this? Or can this be a Firmware Bug?

2

You will want to take a look at the input processing flags for the port(s):

ditty-rp -a ttyxyz

ignbrk, brkint, ignpar, parmrk, inpck, istrip, inlcr, igncr, icrnl,

In most cases these should be off (-).

Also, parity (checking) may impact this, as well. You will want to look over your parity configuration on the port and attached device.

3

Thanks, that’s the trick.

Unfortunately these settings are not visible on the port Servers Web Interface.