50
User Manual
MN04200002E
Effective January 2016
C441 Ethernet module user manual
(C441R, C441T, C441U, C441V)
EATON
www.eaton.com
7 Modbus TCP and Modbus Serial Protocol
Support
All versions of the Ethernet module (C441R, C441T, C441U and
C441V) support the Ethernet based Modbus TCP protocol as a
server device. The C441R and C441T modules provide a serial port
that supports a serial Modbus RTU slave protocol as an additional
monitoring port. The C441U and C441V stand alone modules also
have this serial port, but it is required to be used as a host connec-
tion if used with the C440, S611, or S811+. If the C441R or C441T is
used as a stand alone I/O block, the serial port is also available as an
additional monitoring port.
The supported function codes and register maps are identical for
both the Ethernet Modbus TCP and serial Modbus RTU protocols.
7.1 Supported Function Codes
Commands
Supported
0x01 Read Coils
0x02 Read Discrete Inputs
0x03 Read Holding Registers
0x04 Read Input Register
0x05 Write Single Coil
0x06 Write Single Register
0x0F Write Multiple Coils (15)
0x10 Write Multiple Registers (16)
0x17 Read/Write Multiple Registers (23)
0x2B/0x0E Read Device Identification Get Device Identity (43/14)
(see below for detail)
Function Code Details
0x2B / 0x0E Read Device Identification / Get Device
Identification
Device ID Codes 1,2 and 4 are implemented.
Device ID code 3 (extended info) is not implemented
Object IDs
0
VendorName
1
ProductCode
2
MajorMinorRefision
3
VendorURL
4
ProductName
5
ModelName
6
UserApplicationName
7.2 Register Definitions for the C441 Motor Insight
Table 99. Registers Available with C441 Motor Insight
Start
Coil
Register
Read/
Write Name
Description (Units)
1
1
R
Field Inputs
A Bitfield Representing the Input Points.
Bit = Description
0 = Input 1
1 = Input 2
2 = Input 3
3 = Input 4
- 2
R Control
Voltage
Adapter Source Voltage. ( mV )
- 3
R Ambient
Temperature
Device ambient temperature as measured
from the PCB. ( ºC )
- 4
R/W
Max
Board
Temperature
The maximum board temperature experi-
enced since manufacturing. ( ºC )
65 5
R Dip
Switch
Value
A bit field representing the present state
of the dip switches.
- 6
R Configuration
CRC
A CRC value calculated over the non-
volatile data present.
- 7
R/W
Serial
Number
32 bit Com Adapter Device Serial Number.
-
9
R
Firmware Rev Com Adapter Firmware Rev.
- 11 R/W
Hardware
Rev
Com Adapter Hardware Rev.
1601 101
R/W Field
Relay
Outputs
A Bitfield Representing the Output Points.
Bit = Description
0 = Output 1
1 = Output 2
- 102 R/W
Field
Inputs
Debounce
Array of Debounce Values. A debounce
value exists for each input. The debounce
applies to both rising and falling edge.
( milliseconds )
- 110 R/W
Modbus
TCP
Com Timeout
Communication Timeout for Modbus TCP.
0 = Disable. ( milliseconds )
1761 111
R/W Field
Relay
Fault Action
When a communication fault occurs the
relays can execute two types of behavior.
The behavior is selected on a per bit
basis.
Bit = Description
0 = Relay 1
1 = Relay 2
Bit Value = Description
0 = Apply Fault Value
1 = No Change
1777 112
R/W Field
Relay
Fault State
Communication fault value to be applied.
A bitfield where each bit defines an out-
put point.
Bit Value = Description
0 = Turn Relay Off
1 = Turn Relay On
1793 113
R/W Field
Relay
Idle Action
When a communication idle state occurs
the relays can execute two types of
behavior. The behavior is selected on a
per bit basis.
Bit = Description
0 = Relay 1
1 = Relay 2
Bit Value = Description
0 = Apply Idle Value
1 = No Change
1809 114
R/W Field
Relay
Idle State
Communication idle value to be applied.
A bitfield where each bit defines an out-
put point.
Bit Value = Description
0 = Turn Relay Off
1 = Turn Relay On
