EKEPC2-C/S RS485 Communication Setup Guide

Publish Time: 2026-04-14 15:36 Author: ETEK ELECTRIC Views: 102

Quick answer: To set RS485 communication for an EKEPC2-C/S EPC controller, confirm the RS485 A/B wiring, set the correct baud rate and communication address, match the Modbus or controller parameters on the host device, then test data reading before commissioning the EV charging controller system.

How to setting RS485 communication for EKEPC2-C/S EPC controller
This article introduces the RS485 communication for the ETEC brand EKEPC2-C and EKEPC2-S model charging pile EPC Controller.

1.Communication Interface Wiring

Connected the A, B terminal to a USB-RS485 converter’s A+,B-,no need connect GND,then you can find the equipement COM

2.Protocol,boad rate and register address

EKEPC2-C 和EKEPC2-S Support modbus communication protocol, baud rate: 9600, 8, n, 1 Address: 1-255 Default: 255 (broadcast address)

寄存器地址 Register address	数据说明（掉电保护） Data description (power failure protection)	（R/W）	数据类型 type of data	默认值 Defaults
86	过压保护值（0.01V） Overvoltage protection value (0.01V)	R/W	16位整型 16-bit integer	26500
87	欠压保护（0.01V） Under-voltage protection (0.01V)	R/W	16位整型 16-bit integer	16500
88	过电流保护值（XX%） Overcurrent protection value (XX%)	R/W	16位整型 16-bit integer	120
89	远程启动停止（0无效、1启动、2停止） Remote start and stop (0 invalid, 1 start, 2 stop)	R/W	16位整型 16-bit integer	0
90	1#电表A相电压地址号(65535为无效地址) 1# Meter A-phase voltage address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
91	1#电表B相电压地址号(65535为无效地址) 1# Meter B-phase voltage address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
92	1#电表C相电压地址号(65535为无效地址) 1# Meter C-phase voltage address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
93	1#总电流地址号(65535为无效地址) 1# total current address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
94	1#总功率地址号(65535为无效地址) 1# total power address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
95	1#总电量地址号(65535为无效地址) 1# Total KWH address number (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
96	2#电表的DLB电流地址(65535为无效地址) 2# DLB current address of the meter (65535 is an invalid address)	R/W	16位整型 16-bit integer	65535
97-99	备用 spare	R/W	16位整型 16-bit integer	0
100	设备地址号 Device address number	R/W	16位整型 16-bit integer	255
101	DLB 最大启动电流（0.01A） DLB maximum startup current (0.01A)	R/W	16位整型 16-bit integer	3500
102	DLB 最大保护电流(0.01A) DLB maximum protection current (0.01A)	R/W	16位整型 16-bit integer	4500
103	DLB电流互感器的最大电流(0.01A) Maximum current of DLB current transformer (0.01A)	R/W	16位整型 16-bit integer	10000
104	DLB电流采校准系数 DLB current sampling calibration coefficient	R/W	16位整型 16-bit integer	1270
105-108	备用 spare	R/W
109	Max Output Current PWM Duty cycle（*100）	R/W	16位整型 16-bit integer	9000
110	RCMU功能选择 0禁用 1启用，其他值时由DIP开关选择 RCMU function selection 0 disable 1 enable, other values are selected by DIP switch	R/W	16位整型 16-bit integer	3
111	RFID功能选择 0禁用 1启用，其他值时由DIP开关选择 RFID function selection 0 disable 1 enable, other values are selected by DIP switch	R/W	16位整型 16-bit integer	3
112	锁功能选择 0禁用 1启用，其他值时由DIP开关选择 Lock function selection 0 disable 1 enable, other values are selected by DIP switch	R/W	16位整型 16-bit integer	3
113	线缆功能版选择 0禁用 1启用，其他值时由DIP开关选择 Cable function version selection 0 disable 1 enable, other values are selected by DIP switch	R/W	16位整型 16-bit integer	3
114	DLB功能选择 0禁用 1启用，其他值时由DIP开关选择 DLB function selection 0 disable 1 enable, other values are selected by DIP switch	R/W	16位整型 16-bit integer	3
115	DLB的PID控制参数P PID control parameter P of DLB	R/W	16位整型 16-bit integer	100
116	DLB的PID控制参数I PID control parameter I of DLB	R/W	16位整型 16-bit integer	1
117	DLB的PID控制参数D PID control parameter D of DLB	R/W	16位整型 16-bit integer	100
118-119	控制器ID号最多9位数 Controller ID number Up to 9 digits	R/W	32位 32 bit	0
120	温度修正（差多少输入多少）H Temperature correction (how much difference is input) H	R/W	16位整型 16-bit integer	1024
121	温度修正（差多少输入多少）L Temperature correction (how much difference is input) L	R/W	16位整型 16-bit integer	0
122	解除温度保护值 Release temperature protection value	R/W	16位整型 16-bit integer	600
123	最高温度保护值 Maximum temperature protection value	R/W	16位整型 16-bit integer	700
124	频率修正（差多少输入多少） Frequency correction (how much difference is input)	R/W	16位整型 16-bit integer	65528
125	占空比修正（差多少输入多少） Duty cycle correction (how much difference is input)	R/W	16位整型 16-bit integer	0
126	商标选择0无1WATT 2VOLU Trademark selection 0 none 1WATT 2VOLU	R/W	16位整型 16-bit integer	0
127	极数选择：1P 3P 默认为：1 Pole selection: 1P 3P Default: 1	R/W	16位整型 16-bit integer	1
128	第一档电流设定值PWM The first gear current setting value PWM	R/W	16位整型 16-bit integer	1667
129	第二档电流设定值PWM The second gear current setting value PWM	R/W	16位整型 16-bit integer	2167
130	第三档电流设定值PWM The third gear current setting value PWM	R/W	16位整型 16-bit integer	3333
131	第四档电流设定值PWM The Fourth gear current setting value PWM	R/W	16位整型 16-bit integer	4167
132	第五档电流设定值PWM The Fifth gear current setting value PWM	R/W	16位整型 16-bit integer	5333
133	第六档电流设定值PWM The sixth gear current setting value PWM	R/W	16位整型 16-bit integer	5333
134-139	备用 spare	R/W
140	软件版本号 Software version number	R	16位整型 16-bit integer	1002
141	当前工作状态 : 对应状态0-11 Current working status: Corresponding status 0-11	R	16位整型 16-bit integer
142	线缆规格的PWM值 PWM value for cable gauge	R	16位整型 16-bit integer
143	RCMU状态 00没有选择01 工作正常 02 自检失败 03 充电电路有漏电 RCMU status 00 is not selected 01 works normally 02 self-test failed 03 charging circuit has leakage	R	16位整型 16-bit integer
144	RFID状态 00没选择 01 IC卡没有操作 02 IC卡关闭 03 IC卡打开 RFID status 00 Not selected 01 IC card not operating 02 IC card closed 03 IC card open	R	16位整型 16-bit integer
145	锁状态 00没有选择01 上锁 02解锁 03故障 RFID status 00 Not selected 01 IC card not operating 02 IC card closed 03 IC card open	R	16位整型 16-bit integer
146	DLB功能的当前电流值 Current value of the DLB function	R	16位整型 16-bit integer
147	充电桩当前电流值 0-200.0A Current value of charging pile 0-200.0A	R	16位整型 16-bit integer	暂时无效 temporarily invalid
148	充电桩当前电压值) 0-500.0V Current voltage value of charging pile) 0-500.0V	R	16位整型 16-bit integer	暂时无效 temporarily invalid
149	充电桩当前功率值 0-22000W Current power value of charging pile 0-22000W	R	16位整型 16-bit integer	暂时无效 temporarily invalid
150	参考电流的校准值AD值 Calibration value AD value of reference current	R	16位整型 16-bit integer	暂时无效 temporarily invalid
151	旋转开关设置的电流对应的PWM占空比 PWM duty cycle corresponding to the current set by the rotary switch	R	16位整型 16-bit integer
152	当前输出PWM占空比 Current output PWM duty cycle	R	16位整型 16-bit integer
153	CP正电压 CP positive voltage	R	16位整型 16-bit integer	暂时无效 temporarily invalid
154	CP负电压 CP negative voltage	R	16位整型 16-bit integer	暂时无效 temporarily invalid
155	超电流计数 Overcurrent count	R	16位整型 16-bit integer	暂时无效 temporarily invalid
156	小电流计数 Small current count	R	16位整型 16-bit integer	暂时无效 temporarily invalid
157	当前温度 Current Temperature	R	16位整型 16-bit integer
158	温度AD temperature AD	R	16位整型 16-bit integer	暂时无效 temporarily invalid
159	1#电表A相电压 1# meter A phase voltage	R	16位整型 16-bit integer
160	1#电表B相电压 1# meter B phase voltage	R	16位整型 16-bit integer
161	1#电表C相电压 1# meter C phase voltage	R	16位整型 16-bit integer
162	1#电表电流 1# meter current	R	16位整型 16-bit integer
163	1#电表总功率 1# total power of the meter	R	16位整型 16-bit integer
164-165	1#电表总电量 1# The total electricity of the meter	R	32位整型 32-bit integer
166	2#DLB电表上的电流 2# The current on the DLB meter	R	16位整型 16-bit integer

3.Electric meter connection parameter settings

Register address: 90-95 register value is: a) =65535, this time the address is invalid, all data will be in accordance with the controller set value to display and judge. b) = When the external communication address is 1, the controller will read the corresponding value in the meter. See Table 1/2 below

If the DLB function is enabled and register 96 data is a) =65535, the controller will read the sampling value of the external current transformer. b) = Register number of current value in the ammeter with external communication address 2, the controller will read the current value in the ammeter. See Table 1/2 below

Table 1:

1.EKEM2D or EKEM4D charger power metering meter, communication protocol Modbus-RTU 9600, n,8,1; address number: 01H

Name	Addr（Dec）	Length	Property	Type	Controller address
L 1 phase voltage	2304	4	Float	R	90
L 2 phase voltage	2306/65535	4	Float	R	91
L 3 phase voltage	2308/65535	4	Float	R	92
L 1 phase current	2310	4	Float	R
L 2 phase current	2312/65535	4	Float	R
L 3 phase current	2314/65535	4	Float	R
Average current	2318/6	4	Float	R	93
Sum of three-phase current	2320	4	Float	R
Total active power	2322	4	Float	R	94
L1-2 line voltage	2324	4	Float	R
L1-2 line voltage	2326	4	Float	R
L1-2 line voltage	2328	4	Float	R
Three-phase line voltage average	2330	4	Float	R
There is always power	2332	4	Float	R	95

2.EKEM2D or EKEM4D DLB current monitory meter, communication protocol Modbus-RTU 9600, n,8,1; address number: 02H

Name	Addr（Dec）	Length	Property	Type	Controller address
Average current	2318	4	Float	R	96
Maximum current	2334	4	Float	R	96

Table 2:

1) SDM120M/SDM73 charger power metering meter , communication protocol Modbus-RTU 9600, n,8,1; address number: 01H

Name	Addr（Dec）	Length	Property	Type	Controller address
L 1 phase voltage	0	4	Float	R	90
L 2 phase voltage	2	4	Float	R	91
L 3 phase voltage	4	4	Float	R	92
L 1 phase current	6	4	Float	R
L 2 phase current	8	4	Float	R
L 3 phase current	10	4	Float	R
Average voltage	42	4	Float	R
Average current	46	4	Float	R	93
Sum of three-phase current	48	4	Float	R
Total active power	52	4	Float	R	94
L1-2 line voltage	200	4	Float	R
L1-2 line voltage	202	4	Float	R
L1-2 line voltage	204	4	Float	R
Three-phase line voltage average	2.6	4	Float	R
There is always power	342	4	Float	R	95