Any Experience With Controlling Multiple Servo Drives

[zFuRBlooDz]

Hello,
I am new in CANopen area.

I want to control multiple servo drives (4 drives simultaneously) with stm32f4-disc board. Servo drives that I want to use are supporting CANopen connection. So, I want to send to control data/commands to the servo drives for example sending position command every 1 second. Is it possible to use canopen-stack in my project? Because I saw "this CANopen stack is intended as a "CANopen Slave" only" answer in the closed issue. #97

I want to know that is there any differences between NMT master/slave and normal master/slave? I don't even know if there is a difference between them.
Can I use this stack to send datas/control commands to the other slave nodes in CANopen connection?

Thanks,