Kirill,
Answers to your questions:
E-Stop: Yes, it is a better practice to wire e-stop in parallel with the EN terminal to use disable the hardware on e-stop. Otherwise, you will be at the mercy of the software to stop the machine. Consider that there could be a situation when the PC or software could be the reason why you need to use the e-stop, like a windows blue screen.
SCHP: It is also a better practice to use the SCHP, this will keep the outputs disabled until the software is in control of the system. The software would send a signal, similar to moving an axes, which will allow the C11G to know the software is in control and all other signals should also be valid.
VFD MODE: If you got the VFD in the US, the chances that it is in US Mode, in which case you will use Relay1 as CW On/Off and Relay2 as CCW On/Off. Note that you can also verify/change this in the settings of the FD.
Stepper Wiring: We recommend on our wiring diagrams to use active high wiring, which is to use a GND for Step- and Dir- and activate the signals with a positive as we use high power buffers. Most driver manufacturers suggest wiring using active low signals, as the instructions are generic, and they would work better that way when using a breakout board with weak signals. You can really use it either way.
Multiple E-Stop buttons and Enable: If using multiple e-stop buttons, you will wire them in series, not parallel. In this case, it is the e-stop buttons that are keeping the circuit closed, so they will replace the jumper.
Arturo Duncan
https://cnc4pc.com