
CHAPTER 1: COMMUNICATIONS GUIDE
FIELDBUS INTERFACE
MM300 MOTOR MANAGEMENT SYSTEM – COMMUNICATIONS GUIDE
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The setpoint Fieldbus Input Data can be seen in the Modbus User Map view, but it is not
editable from there. This setting can be edited only in the Communications Settings view in
Enervista MM300/MM200 Setup.
If this setting is set to something other than 0, that many number of User Map registers are
shown on a green background in the User Map view to indicate that these are used for
Profibus input data. This color-coding is done while showing all the User Map registers.
For example: If this setting is configured to a value of 5 registers then the Modbus User
Map view in the setup software show 5 User Map registers on a different background color
to indicate that these are used for Fieldbus Input data purposes.
Profibus DP
To enable the Profibus physical interface, ensure that switches 3 and 4 of the DIP switch on
the communications card (on the CPU module) are ON, and that switches 1 and 2 are OFF.
The external connections through the Fieldbus interface are as follows:
Table 10: Fieldbus interface external connections (Profibus)
The Modbus status (MS) and network status (NS) LEDs indicate the status of the Fieldbus
interface.
Pin
Connection (external device)
V–
Pin 5
L
Pin 8, line A (negative TX/RX)
C
Common drain
H
Pin 3, line B (positive TX/RX)
V+
Pin 6