Littelfuse SE-330 User manual

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SE-330 SERIES (NEW REVISION) MODBUS/TCP INTERFACE
Revision 0-E-121117
Copyright 2018 Littelfuse Startco Ltd.
All rights reserved.
Document Number: PM-1204-EN

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
TABLE OFCONTENTS
SECTION PAGE
1 General ................................................................. 1
2 Modbus Protocol.................................................. 1
2.1 Protocol Setup........................................................ 1
2.2 Error Checking ...................................................... 1
2.3 Function Codes Supported..................................... 1
2.3.1 Read Input/Holding Registers (Code 4/3).. 1
2.3.2 Write Single Register (Code 6) .................. 1
2.3.3 Write Multiple Registers (Code 16) ........... 1
2.3.4 Command Instruction (Code 5).................. 1
2.3.5 Command Instructions Using
Register Writes ........................................... 1
2.4 Error Responses ..................................................... 2
2.5 SE-330 Database .................................................... 2
2.6 Network Status and Indication ............................... 2
3 Data Records ........................................................ 2
4 Specifications........................................................ 2
Appendix A Modbus Register Table............................. 5
Appendix B SE-330 Series (New Revision)
Modbus/TCP Interface Revision History ................... 12
LIST OFFIGURES
FIGURE PAGE
1 Top View of SE-330 (SE-330-X3-XX) with
Dual RJ-45 Ethernet Network Communications ... 3
2 Top View of SE-330 (SE-330-X4-XX) with
Single Fiber SC and Single RJ-45 Ethernet
Network Communications ..................................... 3
3 Top View of SE-330 (SE-330-X5-XX) with
Dual Fiber SC Ethernet
Network Communications ..................................... 4
LIST OFTABLES
TABLE PAGE
1 Supported Commands............................................ 1
DISCLAIMER
Specifications are subject to change without notice.
Littelfuse Startco is not liable for contingent or consequential
damages, or for expenses sustained as a result of incorrect
application, incorrect adjustment, or a malfunction.

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
1. GENERAL
This document describes the Modbus/TCP features
supported by the new revision SE-330, SE-330AU, and
SE-330HV. Unless otherwise indicated, “SE-330”refers
to all three monitor series in general. The Ethernet
network communications interface supports the Modbus-
RTU protocol over TCP/IP using an encapsulating
protocol called Modbus/TCP.
SE-330 ordering options 3, 4, 5, 6, 7 and 8 include dual
Ethernet ports with support for fiber-optic or RJ45
interfaces. See Figs. 1, 2, and 3.
2. MODBUS PROTOCOL
The SE-330 implements the Modbus®TCP protocol on
port 502. The SE-330 is a server (slave) and can
communicate simultaneously with 5 clients (masters).
Modicon Modbus®is a registered trademark of
Schneider Electric.
All Modbus/TCP messages are essentially
Modbus-RTU messages encapsulated with a
Modbus/TCP header, both of which are encapsulated in a
TCP and an IP header. The TCP/IP-header and Modbus
RTU framing is beyond the scope of this document.
2.1 PROTOCOL SETUP
The SE-330 can be configured using SE-MON330
(version 3.2 or higher). The IP address, subnet mask, and
gateway can all be set for each of the network ports.
For more information, see the SE-MON330 help file.
Note: Ensure that each port is configured with a
unique IP address even if not used.
2.2 ERROR CHECKING
Modbus/TCP uses the TCP/IP checksum and error
correction techniques to ensure reliable communications.
If the checksum is correct but the internal data in the
message is not correct, the SE-330 will respond with an
exception code.
2.3 FUNCTION CODES SUPPORTED
The SE-330 Modbus Protocol supports the following
function codes:
•Read Holding Registers (Function Code 3)
•Read Input Registers (Function Code 4)
•Write Single Register (Function Code 6)
•Write Multiple Registers (Function Code 16)
•Command Instruction (Function Code 5)
2.3.1 READ INPUT/HOLDING REGISTERS (CODE 4/3)
Function Codes 3 and 4 are used to read the register
attributes listed in Appendix A.
Function Codes 3 and 4 perform the same function in the
SE-330.
Registers in Modbus start at 40001 decimal and this
register address refers to register/attribute 0.
Note: For hexadecimal numbers, 0x precedes the
value.
2.3.2 WRITE SINGLE REGISTER (CODE 6)
Function Code 6 writes a single 16-bit value to the
SE-330.
Provided no errors occurred, the slave (SE-330) will
return the original message to the master. The response
message is returned only after the ‘write’ has been
executed by the slave.
2.3.3 WRITE MULTIPLE REGISTERS (CODE 16)
Function Code 16 is used to write multiple registers to
the SE-330.
The slave will reply with the slave address, function
code, register address, and the quantity of registers
written.
2.3.4 COMMAND INSTRUCTION (CODE 5)
Modbus Function Code 5 (Force Single Coil) is used to
issue commands to the SE-330. The command code
actions and corresponding coil number are listed in
Table 1.
TABLE 1. SUPPORTED COMMANDS
COMMAND
CODE
COIL
NUMBER
ACTION
0x0001
0x0002
0x0005
0x0008
0x0010
2
3
6
9
17
Remote Trip
Clear Event Records
Set to Defaults
Remote Reset
Remote Calibration
Except for a broadcast address, the slave will return the
original packet to the master.
2.3.5 COMMAND INSTRUCTIONS USING REGISTER
WRITES
For PLCs not supporting Function Code 5, commands
can be issued using Write Single Register (Code 6) and
Write Multiple Register (Code 16).
Commands are written to SE-330 register 6 (Modbus
register 40007). Supported commands are listed in the
COMMAND CODE column in Table 1.
When using the Write Multiple Registers function
code, the write should be to the single SE-330
Register 6. If multiple registers are written starting at
SE-330 Register 6, the first data element will be
interpreted as the command code but no other registers
will be written. If the command is successful, the
SE-330 will return a valid response message.

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
2.4 ERROR RESPONSES
The SE-330 supports the following exception responses:
•01: Illegal Function The function code (Byte 2 of
the Modbus-RTU packet or Byte 8 of the entire
Modbus/TCP message) is not supported
•02: Illegal Data Address All accesses to communication
registers must be within the specified address range
•03: Illegal Data Value This error code is returned if
there is a data value outside the allowable value for the
slave
2.5 SE-330 DATABASE
Appendix A contains the Modbus Register Table. The
table starts at register 0 (Modbus 40001) and each
register/attribute is 16-bits wide. Types “long”and “float”
are 32-bit values. For both long and float types, the low-
order word is transmitted first followed by the high-order
word. Word values have the high byte followed by the low
byte. Float types are per the IEEE 754 Floating-Point
Standard. All bytes of long and float types must be written
using one message or an error will result. This does not
apply for read commands.
For compatibility with the previous Modbus TCP/IP
implementation, registers 80 through 90 are provided. The
previous trip record format is not supported.
2.6 NETWORK STATUS AND INDICATION
Communication status LED’s are located on the top
panel of the SE-330. The Network Status (NS) LED will
indicate solid green when there is link activity, flashing
green when there are no active connections and will flash
red when any link has timed out.
3. DATA RECORDS
Event record information is located starting at SE-330
register 60.
Only one event record can be read at a time. Record data
is for the record indicated by the Record Selector. To select
a record, write the record number to Record Selector with
the first message and then read the values in the record with
a second message. Record Head points to the most recent
record. If there are no records available, Record Head
returns a value of 100.
The Record Selector must be in the range of 0 to 99.
Values outside this range will select record 0.
4. SPECIFICATIONS
Protocol..........................................Modbus/TCP
Ports...............................................2
IP Addresses..................................1 per port
Port 1 Default...........................192.168.1.100
Port 2 Default...........................192.168.2.100
Number of Connections.................8 total
Connectors.....................................Copper and/or fiber, refer to
Figs. 1, 2, and 3 and
ordering information in the
product manual
Copper:
Connector................................RJ45
Cable........................................CAT5
Length......................................100 m (328’)
Interface...................................10BASE-T, 100BASE-Tx
Fiber:
Connector................................SC
Cable........................................SC Multimode
Length......................................2,000 m (6,561’) per
segment
Interface...................................100BASE-Fx
Center Wavelength ................1300 nm
Operating Wavelength...........1270 to 1380 nm

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
FIGURE 1. Top View of SE-330 (SE-330-X3-XX) with Dual RJ-45 Ethernet Network Communications.
FIGURE 2. Top View of SE-330 (SE-330-X4-XX) with Single Fiber SC and Single RJ-45 Ethernet Network
Communications.

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
FIGURE 3. Top View of SE-330 (SE-330-X5-XX) with Dual Fiber SC Ethernet Network Communications.

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
APPENDIX A
MODBUS REGISTER TABLE
ATTRIBUTE
NUMBER
ATTRIBUTE
NAME
SERVICES
DATA
TYPE
NOTES
0
Model Code
Read Only
T1
Always Reads 330
1
Software Version
Read Only
T1
Where 100 = 1.00
2
Serial Number
Read Only
T2 (Low)
3
Read Only
T2 (High)
4
Model Type
Read Only
T3
5
Communication Code
Read Only
T4
6
Command Register
Write Only
T5
7
8
9
10
Date
Read Only
T6 (Low)
11
Read Only
T6 (High)
12
Time
Read Only
T7 (Low)
13
Read Only
T7 (High)
14
EF/GF Trip Time (s)
Read Only
T15
15
EF/GF Trip Level (%)
Read Only
T16
16
EF/GF MEM Trip Level (%)
R/W
T1
17
Pulse Period (s)
Read Only
T19
Not used on SE-330AU or SE-330HV.
18
Vn Trip Level (V)
Read Only
T1
19
NGR Calibration Value
Read Only
T20
Signed 16-Bit Value
20
K1 Configuration
Read Only
T8
21
K1 Mode
Read Only
T9
Not used on SE-330AU or SE-330HV.
22
EF/GF-Trip Latch
Read Only
T10
Not used on SE-330AU or SE-330HV.
23
RF-Trip Latch
Read Only
T10
24
Sensing Resistor Selection
Read Only
T11
25
Frequency
Read Only
T12
26
Spare
Read Only
T1
27
Upgrade Enable
Read Only
T13
28
Pulse Enable State
Read Only
T14
Not used on SE-330AU or SE-330HV
29
SD Card Status
Read Only
T17
30
Remote Reset State
Read Only
T14
31
Calibration State
Read Only
T14
32
K2 Mode
R/W
T18
33
K3 Mode
R/W
T18
34
CT Primary
R/W
T1
See “Effective CT Primary” Setting in SE-MON330.
35
NGR Current (%FS)
Read Only
T1
36
NGR Voltage (% Setting)
Read Only
T1
37
Resistance Change (Ohms)
Read Only
T20
38
CT Detection
Read Only
T1
SE-330AU Only
39
Geo-Magnetic Filter
R/W
T31
40
Resistor-Fault Trip Time (s)
R/W
T1
41
Resistor-Fault Trip Level
(ohms)
R/W
T1
42
Diagnostic LED behavior
R/W
T34
43
44
45
46
K1 Trip Relay
Read Only
T21
47
K2 GF Relay
Read Only
T21
48
K3 RF Relay
Read Only
T21
49
Drive Polarity Output
Read Only
T1
1 = Negative 0 = Positive
50

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
ATTRIBUTE
NUMBER
ATTRIBUTE
NAME
SERVICES
DATA TYPE
NOTES
51
52
53
54
Diagnostic
Read Only
T30
55
Trip Status
Read Only
T22
56
Set-Point Status
Read Only
T23
57
58
59
60
RECORDHEAD
Read Only
T1
61
RECORDCOUNT
Read Only
T1
62
RECORD_INDEX
R/W
T1
63
RECORD_DATE
Read Only
T6 (Low)
64
RECORD_DATE
Read Only
T6 (High)
65
RECORD_TIME
Read Only
T7 (Low)
66
RECORD_TIME
Read Only
T7 (High)
67
RECORD_NGRCURRENT
Read Only
T1
68
RECORD_NGRVOLTAGE
Read Only
T1
69
RECORD_NGRCHANGE
Read Only
T20
70
RECORD_TRIPSTATUS
Read Only
T22
71
RECORD_SETPOINTSTATUS
Read Only
T23
72
73
74
75
Watchdog
Read Only
T1
Always reads 0. Consult factory if not 0.
76
Flash Healthy
Read Only
T24
77
Boot Section
Read Only
T25
78
79
80
Firmware Version
Read Only
T1
Start of SE-330 Backwards Compatibility Register
Block
81
Trip Status
Read Only
T22
82
Setpoint Status
Read Only
T23
83
EF/GF Trip Time (s)
Read Only
T15
84
EF/GF Trip Level (%)
Read Only
T16
85
Pulse Period (s)
Read Only
T19
86
NGR Current (%FS)
Read Only
T1
87
NGR Voltage (% Setting)
Read Only
T1
88
Resistance Change (Ohms)
Read Only
T20
89
Relay Status
Read Only
T26
90
Switches
Read Only
T27
End of SE-330 Backwards Compatibility Register
Block
91
92
93
94
95
96
97
98
99
100
101
IP Address 1
R/W
T28 (Low)
102
R/W
T28 (High)
103
Subnet Mask 1
R/W
T28 (Low)
104
R/W
T28 (High)

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
ATTRIBUTE
NUMBER
ATTRIBUTE
NAME
SERVICES
DATA TYPE
NOTES
105
Gateway 1
R/W
T28 (Low)
106
R/W
T28 (High)
107
MAC Address 1
Read Only
T29 (Word0)
108
Read Only
T29 (Word1)
109
Read Only
T29 (Word2)
110
IP Address 2
R/W
T28 (Low)
111
R/W
T28 (High)
112
Subnet Mask 2
R/W
T28 (Low)
113
R/W
T28 (High)
114
Gateway 2
R/W
T28 (Low)
115
R/W
T28 (High)
116
MAC Address 2
Read Only
T29 (Word0)
117
Read Only
T29 (Word1)
118
Read Only
T29 (Word2)
130
Hardware Version
Read Only
T32
(char 0 + 1)
131
Read Only
T32
(char 2 + 3)
132
Read Only
T32
(char 4 + 5)
133
Read Only
T32
(char 6 + 7)
160
SNTP IP Address
R/W
T28 (Low)
161
R/W
T28 (High)
162
SNTP Poll Rate
R/W
T6 (Low)
163
R/W
T6 (High)
164
SNTP Time Out
R/W
T6 (Low)
165
R/W
T6 (High)
166
SNTP Status
Read Only
T33 (Low)
167
Read Only
T33 (High)
168
SNTP Enable
R/W
T31
Data Types
TYPE
C TYPE
DESCRIPTION
NOTES
T1
Short
16-Bit Unsigned Integer
T2
Long
32-Bit Unsigned Integer
(High) Bits 31..16
(Low) Bits 15..0
T3
Short
1 = Standard
2 = AU
3 = HV
T4
Short
0 = No Communications
1 = DeviceNet
2 = Reserved
3 = Ethernet (Dual RJ45)
4 = Ethernet (Fiber and RJ45)
5 = Ethernet (Dual Fiber)
6 = 61850 (Dual RJ45)
7 = 61850 (Fiber and RJ45)
8 = 61850 (Dual Fiber)
T5
Short
SE-330 Command
1 = Remote Trip
2 = Clear Event Records
5 = Return to Default Values
8 = Remote Reset
16 = Remote Calibration

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
Data Types (continued)
TYPE
C TYPE
DESCRIPTION
NOTES
T6
Long
Date
Bits 31..16: Year in Binary
Bits 15..8: 1-12 Months in Binary
Bits 7..0: 1-31 Days in Binary
T7
Long
Time
Bits 31..24: 0-23 Hours in Binary
Bits 23..16: 0-60 Minutes in Binary
Bits 15..8: 0-60 Seconds in Binary
Bits 7..0: 0-99 Hundredths of Seconds in
Binary
T8
Short
1 = Trip Configuration (K1)
0 = Pulsing Configuration (K1)
T9
Short
1 = Fail Safe Trip-Relay Operation
0 = Non Fail Safe Operation
T10
Short
1 = Latched
0 = Not Latched
T11
Short
1 = 20 k Sensor (200 k for SE-330HV)
0 = 100 k Sensor
T12
Short
1 = 50 Hz
0 = 60 Hz
T13
Short
1 = Run Mode
0 = Upgrade Enable
T14
Short
1 = Open
State of External Contact
0 = Closed
T15
Short
SE-330/SE-330HV
SE-330AU
0 = 0.1 s
100 ms
1 = 0.2 s
120 ms
2 = 0.3 s
140 ms
3 = 0.4 s
160 ms
4 = 0.5 s
180 ms
5 = 0.7 s
200 ms
6 = 1 s
250 ms
7 = 2 s
300 ms
8 = 3 s
350 ms
9 = 5 s
400 ms
10 = 10 s
500 ms
T16
Short
SE-330/SE-330HV
SE-330AU
0 = 2%
0 = 0.125 A
1 = 4%
1 = 0.25A
2 = 6%
2 = 0.3 A
3 = 8%
3 = 0.4 A
4 = 10%
4 = 0.5 A
5 = 20%
5 = 1 A
6 = 40%
6 = 2 A
7 = 60%
7 = 3 A
8 = 80%
8 = 4 A
9 = 100%
9 = 5 A
10 = MEM
T17
Short
0 = No Card
5 = Card Format Error
1 = Card Inserted
6 = Card Initialization Error
2 = Card Logging
7 = Card Format in Progress
3 = Card Full
4 = Card Error
T18
Short
0 = Non-Fail-Safe
1 = Fail-Safe

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
Data Types (continued)
TYPE
C TYPE
DESCRIPTION
NOTES
T19
Short
0 = 1.0
1 = 1.2
2 = 1.4
3 = 1.6
4 = 1.8
5 = 2.0
6 = 2.2
7 = 2.4
8 = 2.6
9 = 2.8
10 = 3.0
T20
Short
16-Bit Signed Integer
T21
Short
0 = De-Energized
1 = Energized
T22
Short
Bit 0, EF/GF
1 = Earth/Ground Fault Trip
0 = No Trip
Bit 1, RF
1 = Resistor Fault Trip
0 = No Trip
Bit 2, CAL
1 = Calibration Error
0 = No Error
Bit 3, ADC
1 = A/D Error
0 = No Error
Bit 4, GRV
1 = Voltage Trip
0 = No Trip
Bit 5, NVRam Error
1 = NVRam Error
0 = No Error
Bit 6, Watchdog
1 = Internal Fault
0 = No Internal Fault
(Will cause a EF/GF and RF trip)
Bit 7, RMT
1 = Remote Trip
0 = No Trip
(Will cause a EF/GF and RF trip)
Bit 8, Hardware Error
1 = Internal Fault
0 = No Internal Fault
(Will cause a EF/GF and RF trip)
T23
Short
Bit 0, EF/GF
1 = Earth/Ground Fault Current >= Setting
0 = Earth/Ground Fault Current < Setting
Bit 1, RF
1 = Resistance >= Trip Level
0 = Resistance < Trip Level
Bit 2, CAL
1 = Calibration Error
0 = No Error
Bit 3, ADC
1 = A/D Error
0 = No Error
Bit 4, GRV
1 = NGR Voltage >= Vn Trip Setting
0 = NGR Voltage < Vn Trip Setting
Bit 5, Not Used
Bit 6, CT Error
1 = CT Error (SE-330AU Only)
0 = No CT Error
Bit 7, CT Latch
1 = CT Trip (SE-330AU Only)
0 = No CT Trip
Bit 8, SD Card Error
1 = SD Card Error/Full
0 = No Error
Bit 9, Upgrade Error
1 = Upgrade Error
0 = No Error

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
Data Types (continued)
TYPE
C TYPE
DESCRIPTION
NOTES
T24
Short
1 = Healthy
0 = Not Healthy
T25
Short
0 = NONE
1 = Factory Default 0
2 = Factory Default 1
3 = Upgrade 0
4 = Upgrade 1
T26
Short
Bit 1, K3
1 = RF Indication Relay Energized
0 = Not Energized
Bit 2, K2
1 = EF/GF Indication Relay Energized
0 = Not Energized
Bit 3, K1
1 = Trip/Pulse Relay Energized
0 = Not Energized
T27
Short
Bit 0, S4
1 = RF Latched
0 = RF Not Latched
Bit 1, S3
1 = EF/GF Latched
0 = EF/GF Not Latched
Bit 2, S5
1 = 20 k Sensor (200 k for SE-330HV)
0 = 100 k Sensor
Bit 3, S6
1 = 50 Hz
0 = 60 Hz
Bit 4, S2
1 = Fail Safe Trip-Relay Operation
0 = Non Fail Safe Operation
S2 not applicable to SE-330AU.
Bit 5, S1
1 = Trip Configuration (K1)
0 = Pulsing Configuration (K1)
S1 not applicable to SE-330AU, SE-330HV.
Bit 6, Not Used = 0
Bit 7, Not Used = 0
T28
Long
IP Address (a.b.c.d)
(High) Bits 31..24 = a
(High) Bits 23..16 = b
(Low) Bits 15..8 = c
(Low) Bits 7..0 = d
T29
Long
Long
MAC Address (a:b:c:d:e:f)
(Word2) Bits 47..40 = a
(Word2) Bits 39..32 = b
(Word1) Bits 31..24 = c
(Word1) Bits 23..16 = d
(Word0) Bits 15..8 = e
(Word0) Bits 7..0 = f
T30
Short
0 = None
1 = Calibration Error
2 = Remote Trip
3 = CT Latch Error
4 = ADC Error
5 = SD Card Error
6 = Watchdog Trip
7 = Hardware Error
8 = NVRAM Error
9 = Flash Upgrade Error
10 = USB Error
T31
Short
0 = Disabled
1 = Enabled

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
Data Types (continued)
TYPE
C TYPE
DESCRIPTION
NOTES
T32
Char
Register +0: Char[0] and Char[1]. Char[0] at
MSByte
Register +1: Char[2] and Char[3]. Char[2] at
MSByte
Register +N: Char[N*2] and Char[N*2+1].
Char[N*2] at MSByte
T33
Long
-1 = Initializing
0 = SNTP Synced
4355 = Server Not Running
5122 = No Route to Host
5392 = No Route to Host
T34
Short
0 = All Diagnostic Codes
1 = Critical Diagnostic Codes Only

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SE-330 Series (New Revision) Modbus/TCP Interface Rev. 0-E-121117
APPENDIX B
SE-330 SERIES (NEW REVISION) MODBUS/TCP INTERFACE REVISION HISTORY
MANUAL RELEASE DATE
MANUAL REVISION
December 11, 2017
0-E-121117
June 25, 2015
0-D-062515
July 17, 2014
0-C-071714
February 3, 2014
0-B-020314
November 29, 2013
0-A-112913
MANUAL REVISION HISTORY
REVISION 0-E-121117
SECTION 2
Note added in Section 2.1.
SECTION 4
Specifications updated.
REVISION 0-D-062515
SECTION 4
IP Addresses updated.
APPENDIX A
Modbus registers 34 and 39-41 updated. Registers 130-133 and 160-168 added.
Data types 31, 32 and 33 added.
REVISION 0-C-071714
Remote calibration feature added.
SECTION 2
Remote calibration added to Table 1.
APPENDIX A
Remote calibration added to data types.
REVISION 0-B-020314
SECTION 2
Figs. 1, 2, and 3 added.
SECTION 4
Specifications updated.
REVISION 0-A-112913
Initial release.