Step/dir interface of TMCM-1060

[Gavy]

Dear Sir,
My controler PLC output is differential signal step+ step- and Dir+ dir-,
But TMCM-1060 is single Step ,dir and common V,
I want to know whether we can use this PLC control TMCM-1060 by step and dir signal?

[Olav Kahlbaum (TRINAMIC)]

Dear Gavy,
first, switch on Step/Direction mode by setting axis parameter 254 to 1 and storing this setting (SAP 254, 0, 1 and then STAP 254, 0). Afterwards power cycle the module. Göran will tell you how to connect the step/direction signals properly.

[Goeran Eggers (TRINAMIC)]

Dear Gavy,

in principle differential S/D signals are no problem. You can use one one of each signal pairs and connect them to the Enable and Step signal inputs (and just ignore the other signals).

But:
- the voltage difference between low and high level of the signals should be high enough (close to +5V or higher) in order to drive the opto-coupler
- you should have an additional common supply voltage which is close to the high level of theses signals. This voltage has to be connected to the "COMMON" input

If the voltage levels are high enough but, a common supply voltage is missing the following might work:

Connect signals:
- connect "DIR-" (differential output, inverted signal) of the controller to "DIRECTION" input of the TMCM-1060
- connect "STEP-" (differential output, inverted signal) of the controller to "STEP" input of the TMCM-1060

"generate" common input voltage
- connect "DIR-" (differential output, inverted signal) of the controller via a schottky (low drop) diode to the "COMMON" input of the TMCM-1060
- connect "DIR+" (differential output, non-inverted signal) of the controller via a schottky (low drop) diode to the "COMMON" input of the TMCM-1060
- you may place an additional capacitor behind the two diodes at the "COMMON" input
-> this way there should always be a positive supply connected to "COMMON"

Hope this helps