Communication cable

and i want to know the communication cable pin assignment.
and if there are parameters needs to be adjusted for communication.
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Yes you can use Drive Monitor, but the official Tool is STARTER; both can embedded in ProfiBus.
Link: http://support.automation.siemens.com/WW/view/en/10804971/130000

To communicate Via DP-Bus with a MM420 you need to have a DP-Module
Order No: 6SE6400-1PB00-0AA0;
If you have one, use the DP-Bus-cable, you don´t need a special cable.

STARTER (and DriveMonitor) can also be used as STAND ALONE.
You need a Connection kit for PC to inverter
Order No: 6SE6400-1PC00-0AA0

See also FAQ-Cluster: Micromaster 4 -- Commissioning and operation -- Using STARTER