Shijiazhuang Tonhe Electronics Technologies Co.,Ltd.

COMMUNICATION PROTOCOL BETWEEN CHARGING

MODULES AND MONITOR （THJS-TXXY-0060 V1.2）

1．Range
The protocol is applied to communication protocol between the main control board of
the module type one double charge charger and charging modules.
2．Normative Files
The following documents are essential for the application of this file. All dated
normative files, only dated versions are applied to this file. All undated normative files,
the newest version (including all revising documents) are applied to this file.
GB/T 19596 EV Terms
GB/T 27930-2011 Communication Protocol between EV Offboard Conduction Type and
battery management system
ISO 11898-1:2003 Road vehicle – Control area network (CAN) Part 1: Data link layer
and physical signaling
SAE J1939-11:2006 Commercial vehicle control system LAN CAN communication
protocol Part 11:Physical layer – 250K bits/s, twisted shielded pair.
SAE J1939-73:2006 Commercial vehicle control system LAN CAN communication
protocol Part 21: Data link layer
SAE J1939-73:2006 Commercial vehicle control system LAN CAN communication
protocol Part 73: Application Layer – Diagnostics
3. Terms and Definitions
GB/T 19596 Defined and the following terms and definitions apply to this file.
3.1 Frame
A series of data bits that form a complete message.
3.2 CAN data frame
The ordered bit domain required to form the CAN protocol for transferring data. Start
from frame(SOF) and end of frame(EOF).
3.3 Messages

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One or more “CAN data frames” with the same parameter group number.
3.4 Identifier
The identity part of the CAN arbitration domain.
3.5 Standard frame
CAN data frames defined in the bus using 11 bit identifiers.
3.6 Extended frame
CAN data frames defined in the bus using 29 bit identifiers.
3.7 Priority
In the identifiers, a three-bit field sets the arbitration priority of the transport process.
The highest priority is 0, and the lowest priority is 7.
3.8 Parameter group (PG)
The collection of transporting parameters in a message. Parameter groups
include: commands, data, request, response, and negative response and so on.
3.9 Parameter group number (PGN)
A 24-bit value used to uniquely identify a parameter group. PGN include: reservation
bit, data page, PDU format domain (8 bits), group extension domain (8 bits).
3.10 Suspect parameter number (SPN)
The application layer describes the signal by parameters, and assigns a 19-bit value
to each parameter.
3.11 Protocol data unit (PDU)
A specific CAN data frame format
3.12 Transport protocol
A part of the data link layer that provides a mechanism for transferring data to a PGN
of 9 bytes or more.
3.13 Electronic control unit (ECU)
ECU, namely the on-board computer, consisting of microcomputer and peripheral
circuit.
3.14 Diagnostic trouble code（DTC）

A 4-byte value for identifying fault type, associated failure mode, and occurrence
times.
4, General Rules

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4.1 The communication network between the main control and charging module
adopts CAN communication protocol.
4.2 This standard data transmission adopts low-first send format.
5. Physical Layer
5.1 General Rules
The physical layer of this standard shall conform to the provisions in ISO 11898-
1:2003 、 SAE J1939-11:2006. This communication shall adopt the isolated CAN

interface. And communication rate adopts 125kbit/s.

6．Data Link Layer (DLL)
6.1 Frame Format
The device using this standard should use the 29-bit identifier of the CAN extension
frame. The corresponding definition of each bit assignment should conform to the
relevant provisions of 5.1 provision in SAE J1939-21:2006.
6.2 Protocol Data Unit (PDU)
Each CAN data frame contains a single PDU, as shown in sheet 1. PDU consists of
seven parts, namely priority, reservation, data page, PDU format, specific PDU, source
address and data domain.
Sheet 1 Protocol Data Unit( PDU)

...
R DP
P PF PS SA DATA
3 1 1 8 8 8 0-64
Remark 1：P is priority: Set from the highest 0 to the lowest 7 .
Remark 2：R is reservation：Prepare for future development. This standard is 0.
Remark 3：DP i s d a t a p a g e：Used to select the auxiliary page described by the parameter group.
This standard is 0.
Remark 4：PF is PDU format：Used to confirm PDU format and corresponding parameter group No
of the data domain.
Remark 5：PS is specific PDU format：PS value depends on PDU format. Adopting PDU1 format in
this standard，PS value is target address.
Remark 6：SA is source address：the source address that sends the message.

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.3 Protocol Data Unit (PDU) Format

This standard adopts PDU1 format defined in 5.3 of SAE J1939-21:2006.
6.4 Parameter Group Number (PGN)
The second byte of this standard PGN is PDU format (PF), and both high and low
byte bits are 00H.
6.5 IP
The standard network address is used to ensure the uniqueness of information
identifiers and the source of information. The assigned address is like Sheet 2.

Sheet 2 IP
Device Address
Main control 0xAO
Charging module 1-240（broadcast address is 0xff）

6.6 Information Type

The CAN bus technical specification supports five types of information, which are
command, request, broadcast/response, validation, and group function. The specific
definition should follow the rule of message type of 5.4 in SAE J1939-21:2006.
7. Application Layer
7.1 This standard application adopts the form of parameter and parameter group definition.
7.2 PGN is used to number the parameter group, and each node identified the content of the data packet
according to PGN.
7.3 Adopting periodic and event-driven manner to send data.
7.4 When defining a new parameter group, try best to keep the parameters of the same
function, the same or similar refresh frequency, and the parameters belonging to the
same subsystem in the same parameter. At the same time, a new parameter group
should not only make full use of 8 bytes data width, trying best to put the related
parameters in the same group, but also consider the extendability, setting aside some
parts of bytes or position, so as to modify in the future.
7.5 When you modify a defined parameter group, you should not modify the definition
of a defined byte or bit. The newly added parameters should be related to the original
parameters in the parameter group, and the irrelevant parameters should not be
added to the defined PGN even if the number of PGN is expected to save.

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7.6 In the process of data transmission, except the special instructions, all are 16
hexadecimal.

8. Message classification

8.1 Up-link data

Source
Message
Message Message PGN Data Length address-
Priority Cycle
Code Description (Hex) byte destination
ms
address
Charging
M_C_1
Charging 6 8 500+ Trigger module-
module state 000100H master control
Specific
module start
Charging
&stop and 000200H
M_C_2 2 8 Trigger mode module-
over/under
master control
voltage setting
confirmation
Charging
AC information
M_C_3
upload
000B00H 6 8 500 module-
master control
Extended Charging
M_C_4 state/ fault info 009100H 7 8 500+ Trigger module-
upload master control

8.2 Down-link date

Broadcast mode:
Source
Data
Message Message Message cycle address-
PGN(Hex) Priority length
mode description ms destination
byte
address
Master
C_M_1 Module 000300H 2 8 Trigger mode control –
start/stop Charging
module
Module Master
C_M_2 parameter 000400H 4 8 Trigger mode control –
setting Charging
module
Master
C_M_3 Timing 000500H 6 8 5000 ms control –
command Charging
module
Master
Input mode control –
C_M_4 00AA00H 6 8 Trigger mode
configuration Charging
module
Master
Address
control –
C_M_12 setting 009000H 7 8 Trigger mode
Charging
selection
module

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To the specific module

Source
Data
Message Message Message cycle address-
PGN(Hex) Priority length
mode description ms destination
byte
address
Module Master
C_M_23 address 000900H 6 8 Trigger mode control –
setting Charging
module
Specific
module Master
C_M_24 start/stop & 000600H 2 8 Trigger mode control –
voltage Charging
current module
setting

9. Format and content of the message

9.1 Up-link data
9.1.1 Charging module state
Starting byte Length Definition of SPN Remarks
or bit
1 1 byte Charging module 0x00: normal OFF status
state 0x01: ON status
0x11: fault OFF status
2 2 bytes Output voltage of 0.1V/ bit, 0V offset,
charging module Data range: 0~1100 V
4 2 bytes Output current of 0.01 A/bit, 0A offset;
charging module Data range: 0~200A
6 2 bytes Fault/alarm Bit0: Module input undervoltage
Bit = 0, normal Bit1: Module input phase loss
Bit = 1, faulty Bit2: Module input overvoltage
Bit3: Module output overvoltage
Bit4: Module output overcurrent
Bit5: Module temperature high
Bit6: Module fan fault
Bit7: Module hardware fault
Bit8: Bus exception
Bit9: SCI communication exception
Bit10: Discharge fault
Bit11: PFC shutdown due to exception
Bit12: Output undervoltage warning
Bit13: Output overvoltage warning
Bit14: Power limit due to high

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temperature
Bit15: Short circuit fault
8 1 byte PFC fault Bit0: Input overcurrent fault
Bit = 0, normal Bit1: Mains frequency fault
Bit = 1, faulty Bit2: Mains imbalance fault
Bit3: DCTz fault
Bit4: Address conflict
Bit5: Bus bias
Bit6: Phase exception fault
Bit7: Bus overvoltage fault

Notes: 1. When any one of fault status Bit8-Bit13 occurs, in addition to that
corresponding fault bits will be set, Bit7 will be also set.
2. When Bit2 and Bit7 faults among PFC faults occur, in addition to that
corresponding fault bits will be set, Bit7 module hardware fault among the fault
statuses will be also set.
Example of message:
Message information of No.1 module: shutdown due to fault, output voltage 0V,
current 0A; the specific faults are bus bias, PFC exception, hardware fault.

0x1801A001 11 00 00 00 00 80 08 10
Shutdown Voltage 0V Current 0A Fault status Bus bias
due to fault 0x0880
PFC shutdown due to exception, hardware fault

9.1.2 Confirmation of start/stop and overvoltage/undervoltage settings of a specific

module
Be sent when the module receives a specific module start/stop command.

Starting byte or Length Definition Remarks

bit of SPN
1 1 byte Whether 0x00, not received
the 0x01, received
command
is received
2 7 bytes Standby 0x00

Example of message:
Message information of No.1 module:
0x0802A001 01 00 00 00 00 00 00 00

Command received

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9.1.3 Uploading of AC information

Starting byte Length Definition of SPN Remarks
1 2 A-phase voltage
3 2 B-phase voltage
5 2 C-phase voltage
7 2 Ambient temperature

Example of message:
Message information of No.1 module:
0x180BA001 E5 08 E9 08 D7 08 18 00
A-phase B-phase C-phase Ambient
0x08E5 0x08E9 0x08D7 temperature
0x0018
227.7 V 228.1 V 226.3 V 24℃

9.1.4 Uploading of extension status/fault information

Starting byte Length Definition of SPN Remarks
1 2 Bit0: Current equalization
bytes Bit1: Mute
Bit2: E2 Fault overflow
Module state Bit3: 0 -AC input source,1 -DC input
Bit = 0 No source
Bit = 1 Yes Bit4:0-E2 fault enabled, 1-E2 fault
disabled
Bit5:0- hot-plug disabled. 1-
hot-plug enabled

3 2 Fault/warning Bit0: Pre-level wave stop

bytes Bit = 0 normal Bit1: Hot-plug fault
Bit = 1 faulty Bit2: CAN communication timeout
Bit3: Reserved
Bit4: Relay operation fault
Bit5: Reserved
Bit6: Internal element
overtemperature
Bit7: Air inlet overtemperature
Bit8: Input power limit
Bit9: Power limit due to
overtemperature
Bit10: Discharge changeover
abnormal

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5 4 bytes Standby Reserved

9.2 Down-link data
9.2.1 Module start/stop

Starting byte Length Definition of SPN Remarks

or bit
1 3 bytes Module processing Bit0:
message flag Module with address of 1
0= Do not process the message of
this frame.
1= Process the message of this
frame.
Bit1:
Module with address of 2
0= Do not process the message of
this frame.
1= Process the message of this
frame.
Bit2:
Module with address of 3
0= Do not process the message of
this frame.
1= Process the message of this
frame.
…
4 1 byte Module start/stop 55H, stop
AAH, start
5 1 byte Module group These upper 4 bits refer to the
number + address module group number: 0
multiple indicates that the module group
number is 1 by default
These lower 4 bits refer to the
address multiple: 1/time, data
range: 0x00~0x09
6 3 bytes Standby 0x00

Notes: 1. If the address multiple is 0, the message processing flag of the module
indicates the address of the module from 1 to 24.
If the address multiple is 1, the message processing flag of the module indicates the
address of the module from 25 to 48.
If the address multiple is 2, the message processing flag of the module indicates the
address of the module from 49 to 72.

...

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2.Address algorithm: Assuming that the actual address of the module is n, the address
multiple is m, and the message processing flag of the module is k,
if((k &(1 << (n-m*24-1)))== (1 << (n-m*24-
1))) //The address to be set is consistent with the actual address.
{Start/stop}else{addresses are not consistent}
Example of message:
Message issued by the upper computer: Control the start of modules No.1-24 and
set the group number as 1
0x0803FFA0 FF FF FF AA 00 00 00 00
Address Start Group number
0xFFFFFF 1, multiple 1
No. 1-24

9.2.2 Module parameter setting

Starting byte or Length Definition of SPN Remarks
bit
1 3 bytes Module processing Bit0:
message flag Module with address of 1
0= Do not process the message of
this frame.
1= Process the message of this
frame.
Bit1:
Module with address of 2
0= Do not process the message of
this frame.
1= Process the message of this
frame.
Bit2:
Module with address of 3
0= Do not process the message of
this frame.
1= Process the message of this
frame.
…
4 1 byte Module group These upper 4 bits refer to the
number + address module group number:0
multiple indicates that the module group
number is 1 by default
These lower 4 bits refer to the
address multiple: 1/time, data
range: 0x00~0x09
5 2 bytes Charging voltage 0.1V/ bit, 0V offset,

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Data range: 0~750V

7 2 bytes Charging current 0.01 A/bit, 0A offset;

Data range: 0~500 A

Notes: 1. When the charging voltage issued by the monitor exceeds the maximum voltage
that can be output by the module, the module will output the maximum voltage; when the
charging voltage issued by the monitor is lower than the minimum voltage output by the
module, the module will output the minimum voltage.
2.When the charging current issued by the monitor exceeds the maximum current that can
be output by the module, the module will output the maximum current; when the charging
current issued by the monitor is lower than the minimum current output by the module, the
module will output the minimum current.
Example of message:
Message issued by the upper computer: Set the group number of modules No.1-24
as 1, output voltage 500V, output current 41A

0x1004FFA0 FF FF FF 00 88 13 04 10
Address Group number Voltage 0x1388 Current 0x1040
0xFFFFFF 1, multiple 1

1-24 500V 41A

9.2.3 Timing command

Starting byte or Length Definition of Rema
bit SPN rks
1 8 bytes Standby 0x00

Example of message:
The master control sends a timing command:

0x1805FFA0 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

9.2.4 Start/stop of a specific module

Starting byte Length Definition of SPN Remarks
or bit
1 1 byte Module start/stop 55H, stop
AAH, start
2 1 byte Charging mode In the standby mode: 0x00
(standby)
3 2 bytes Charging 0.1V/ bit, 0V offset, data

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voltage range: 0~1000V

5 2 bytes Charging current 0.01 A/bit, 0A offset;
Data range: 0~500 A
7 2 bytes Standby 0x00

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Example of message:
Message issued by the upper computer: Control the start of No.1 module, output
voltage 500V, output current 41A

0x080601A0 AA 00 88 13 04 10 00 00
Start Voltage Current
0x1388 0x1040
500V 41A

9.2.5 Module address setting

Starting byte or Length Definition of Remarks
bit SPN
1 1 byte New address 1/bit, data range 1~240
of module
2 7 bytes Standby 0x00
Notes: The module address setting will be stored in the EEPROM and will be stored
on power failure
Message issued by the upper computer: set the address of all modules as 2

0x1809FFA0 02 00 00 00 00 00 00 00
New address 2
9.2.6 Selection of module address setting
Starting byte Length Definition of SPN Remarks
0: Automatic 1:
1 1 Reserved Manual
2 7 Reserved
Notes: 1. If the module address setting is selected as “Automatic”, it means that the
address will be automatically assigned when the module is powered on; if the module
address setting is selected as “Manual”, it means that the address will be set via the
upper computer; the module is set as “Automatic” by default.
The module can only receive the module address setting selection command when it
is powered off.
Message issued by the upper computer: set the address mode of all modules as
“Manual”.

0x1C90FFA0 01 00 00 00 00 00 00 00
Manual mode

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9.2.7 Input mode configuration

Start Byte Length SPN definition Remark
1 1 Reserved 0:input DC mode
1:input AC mode
2 7 Reserved
Remark: 1. The module can receive input mode configuration commands only
when it is powered off.
The upper computer send the message: set all module input as AC mode
0x18AAFFA0 01 00 00 00 00 00 00 00
Input AC mode

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Appendix A

A.1 Data transmission process chart

A.1.1 Module state transmission process

Periodical transmission by charging module

Automatically sent when the status of charging module is changed

A.1.2 Module start/stop process (broadcast mode)

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A.1.3 Module parameter setting process

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A.1.4 Start/stop (address setting/overvoltage/undervoltage setting)

process of a specific module

A.1.5 Timing command

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A.2 Application case

A.2.1 Charging module state

Charging state sent by the charging module 1: (400V, 100A, no fault )

1801a001 0x01 0xa0 0x0f 0x10 0x27 0x00 0x00 0x00

A.2.2 Module start/stop
Master control: modules 1-3 start
0803ffa0 0x07 0x00 0x00 0xaa 0x00 0x00 0x00 0x00

A.2.3 Module parameter setting

Master control: Parameter setting of modules 1-3 (400V,100A, constant-voltage charging)
1004ffa0 0x07 0x00 0x00 0x00 0xa0 0x0f 0x10 0x27

A.2.4 Start/stop process of a specific module

Master control: start module 1
080601a0 0xaa 0x01 0xa0 0x0f 0x10 0x27 0x00 0x00

Confirm start/stop of charging module 1

0802a001 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0x00
A.2.5 Timing command
The master control sends a timing command:
1805ffa0 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00

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