SLM-DCO-15N

SLM-DCO-15N

Channels: 15
Voltage Ranges: 3.3-24 VDC\ Output Type: Sink
Data Type: Binary, each channel has its own input-status register

Specifications:
Download SLM-DCO-15N Datasheet

Description

• 15-channel 24VDC sinking discrete outputs.

• Designed for industrial control applications requiring multiple DC outputs.

• Outputs use sinking (NPN) transistor switching.

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Configuration

• No configuration required

Typical Modbus Register Mapping

Channel	Modbus Register	Access
CH1	00001	Read/Write
CH2	00002	Read/Write
CH3	00003	Read/Write
CH4	00004	Read/Write
CH5	00005	Read/Write
CH6	00006	Read/Write
CH7	00007	Read/Write
CH8	00008	Read/Write
CH9	00009	Read/Write
CH10	00010	Read/Write
CH11	00011	Read/Write
CH12	00012	Read/Write
CH13	00013	Read/Write
CH14	00014	Read/Write
CH15	00015	Read/Write

Notes:

• Outputs (CH1-CH15) are read/write and correspond to Modbus Coil Registers (00001 - 00015).

• What should be Output (CH16) is reserved, but not used in this 15 channel module.

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Specifications

Download SLM-DCO-15N Datasheet

Example Usage

Note

The following examples assume that it is the only module connected. Actual mapping may vary depending on the configuration of the system.

Getting Example Readings

Python

import time
from pyModbusTCP.client import ModbusClient
import struct

client_ip = '192.168.1.255'  # Replace with your device's IP
client = ModbusClient(host=client_ip, port=502, auto_open=True)

while True:
    client.write_single_coil(3, True); # Write 1 to coil address 3 (channel 4)
    time.sleep(1)
    client.write_multiple_coils(0, [True, False, True, False, True, False, True, False, True, False, True, False, True, False, True]); # Alternate values to coils 0-14
    time.sleep(1)

Note

This is an explanatory section on how to read/write to a module. For a more complete example using Python, visit Python Example.

Arduino

#include <ArduinoModbus.h> // Include Modbus library

// Assume ModbusRTUClient is already initialized (e.g., ModbusRTUClient.begin(...))
int slaveId = 0x01;       // The ID of the Modbus slave device
int startAddress = 0;     // The starting address of the coils
int numCoils = 15;         // The number of coils to write (0-14)
int coilValues[] = {1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1}; // Values for coils 0 through 14

void setup() {
    # Setup modbus client
}

void loop() {
    writeMultipleCoilsPattern_BeginWriteEnd();
    delay(1000);
}

void writeMultipleCoilsPattern_BeginWriteEnd() {
  // Start writing multiple coils
  ModbusRTUClient.beginTransmission(slaveId, COILS, startAddress, numCoils);

  // Write the pattern 1, 0, 1, 0, 1, 0, 1, 0 for coils 0-7
  for (int i = 0; i < numCoils; i++) {
    // Write 1 for even coils (0, 2, 4, 6), 0 for odd coils (1, 3, 5, 7)
    ModbusRTUClient.write(coilValues[i]);
  }

  // Send the write request
  ModbusRTUClient.endTransmission();
}

Note

The above code uses the ArduinoModbus library and is not a complete program.

Note

This is an explanatory section on how to read/write to a module. For a more complete example using Arduino, visit Arduino Example.

Codesys

Under Modbus_TCP_Server -> Modbus Server Channel Under Modbus_TCP_Server -> Modbus Server Channel -> I/O Mapping Usage

VAR
    DCO15_1 AT %QB0 : BYTE;
    DCO15_2 AT %QB1 : BYTE;
    DCOCH1 AT QX0.0 : BOOL;
    DCOCH2 AT QX0.1 : BOOL;
    DCOCH3 AT QX0.2 : BOOL;
    DCOCH4 AT QX0.3 : BOOL;
    DCOCH5 AT QX0.4 : BOOL;
    DCOCH6 AT QX0.5 : BOOL;
    DCOCH7 AT QX0.6 : BOOL;
    DCOCH8 AT QX0.7 : BOOL;
    DCOCH9 AT QX1.0 : BOOL;
    DCOCH10 AT QX1.1 : BOOL;
    DCOCH11 AT QX1.2 : BOOL;
    DCOCH12 AT QX1.3 : BOOL;
    DCOCH13 AT QX1.4 : BOOL;
    DCOCH14 AT QX1.5 : BOOL;
END_VAR

Note

This is an explanatory section on how to read/write to a module. For a more complete example using Codesys, visit Codesys Example.

Productivity Suite

Tag

Tag Name	Type
DO1	Boolean
DO2	Boolean
DO3	Boolean
DO4	Boolean
DO5	Boolean
DO6	Boolean
DO7	Boolean
DO8	Boolean
DO9	Boolean
DO10	Boolean
DO11	Boolean
DO12	Boolean
DO13	Boolean
DO14	Boolean
DO15	Boolean

Usage

Note

This is an explanatory section on how to read/write to a module. For a more complete example using Productivity Suite, visit Productivity Suite Example.

Safety Precautions

• Do not add or remove modules while field power is applied.

• Ensure proper grounding and wire connections to prevent electrical hazards.

• Follow all local and national electrical codes.

• Maintain adequate ventilation to prevent overheating.

For more details and technical support, visit Synergy Logic or contact support@synergy-logic.com.