How to setting RS485 communication for EKEPC2-C/S EPC controller

Publish Time: 2025-10-22 10:28 Author: ETEK Electric Visit: 9

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