Datasheet

Ip251_02b_oi_e.doc / Dez-15 Page 12 / 28
6.1. Self-Test
On your PC screen, in the ”Outputs” field, you find several indicator boxes.
When the ”Self-test passed” box lights red, this indicates that the unit has correctly initialized
and is ready to work. The fields ”Status SSI-CLK” and ”Status SSI-Data” indicate that the clock
and data lines work correctly (red color = o.k.) *)
You may observe that these boxes blink, because of the update cycle of your PC. However, you
should see “red” predominantly with correct operation of the lines.
6.2. Output value
When the encoder position is changing, this window must show increasing or decreasing
encoder values. Where the color bar or the percentage display are jumping or hunting, please
check once more for correct setting of the DIL switch.
6.3. Hold key
This soft key operates in parallel to the hardware input terminal 10 and allows freezing the
parallel output from the PC screen. Indicator boxes in the RS column indicate that the Hold
function is active, either by software or by hardware command.
*) Testing the clock lines is primarily useful with Slave operation. Though the test works also in Master
mode, the result says only that the internal generation of the clock works fine. However, in Master mode,
this test cannot indicate faulty clock drivers or bad wiring of the clock lines