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 —
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