The encoder tab on Roborun is faulty.
Please download and install the latest revision from <A href="www.roboteq.com/doclink.html"
From that tab, when working, you should see the counter count up.
You will also see the measured speed. Speed is reported as a value from -127 to +127. The relationship between that number and the actual speed depends on the encoder count and the time base you select.
Best is to first exercise the motor/encoder in open loop so that you can looks at the numbers and configure the adequate time base. Also, you should verify that speed and count is in the same direction (polarity) as the command.
Only after that you should close the loop.