Serial Interface (Modbus RTU)
M-Max Series Adjustable Frequency Drive
MN04020003E—October 2013 www.eaton.com
137
Modbus Process Data
Process data is processed in the M-Max frequency inverter faster than the display values,
error codes and parameters.
Input Process Data
The input process data is used to control the M-Max frequency inverter.
Control Word (ID 2001)
These bits are used to control the M-Max frequency inverter. The content can be adapted to
your own application and then sent as a control word to the frequency inverter.
ID
Modbus Register
Designation
Value Range
Type
2001
32001, 42001
Fieldbus control word (BUS)
—
Binary code
2002
32002, 42002
Fieldbus general control word (BUS)
—
Binary code
2003
32003, 42003
Fieldbus speed setpoint (BUS)
0.01
%
2004
32004, 42004
PID controller, setpoint
0.01
%
2005
32005, 42005
PID actual value
0.01
%
2006
32006, 42006
—
—
—
2007
32007, 42007
—
—
—
2008
32008, 42008
—
—
—
2009
32009, 42009
—
—
—
2010
32010, 42010
—
—
—
2011
32011, 42011
—
—
—
Bit
Description
Value = 0
Value = 1
0
Stop
Operation
1
Clockwise rotating field (FWD)
Anticlockwise rotating field (REV)
2
No action
Reset error
3
As per setting P6.8
Free coasting (overwrite value from P6.8)
4
As per setting P6.8
Ramp (overwrite value from P6.8)
5
No action
Overwrite acceleration/deceleration ramps to 0.1
s
6
No action
Block setpoint (speed not variable)
7
No action
Overwrite setpoint with 0
8
No action
Control level = Fieldbus (overwrite value from P6.8)
9
No action
Setpoint input = Fieldbus (overwrite value from P6.8)
10
Not used
—
11
Not used
—
12
No action
The inverter is blocked and the drive stops as quickly as possible
(an edge is required for restart)
13
No action
Control of a digital output:
P5.1 = 28 (Relay R01)
P5.2 = 28 (Relay R02)
P5.3 = 28 (Transistor D0)
14
Not used
—
15
Not used
—