# Configuration IEC60870
##### DIP switch configuration
This is DIP switch functions diagram for Modbus RTU configuration. For enable IEC60870 protocol 1 switch should be in ON position.
[](https://docs.atreyo.in/uploads/images/gallery/2025-03/amb-8i-4o-dip-2.png)
##### Parity configuration
Parity configuration for both Modbus and IEC.
| Parity | Function |
| 00
| NONE |
| 01
| ODD
|
| 10
| EVEN
|
| 11
| NONE |
---
##### Baudrate configuration
Baudrate configuration for both Modbus and IEC
| Switch | Baudrate |
| 0000
| 9600 |
| 0001
| 1200 |
| 0010
| 2400 |
| 0011
| 4800 |
| 0100
| 14400 |
| 0101
| 19200 |
| 0110
| 28800 |
| 0111 | 38400 |
| 1000
| 57600 |
| 1001
| 76800 |
| 1010
| 115200 |
| 1011
| 230400 |
| 1100
| 256000 |
| 1101
| 460800 |
| 1110
| 576000 |
| 1111
| 921600 |
---
##### Address configuration for IEC
| Switch | Value | IEC Address |
| 0000
| 0 | 1
|
| 0001
| 1 | 2
|
| 0010
| 2 | 3
|
| 0011
| 3 | 4
|
| 0100
| 4 | 5
|
| 0101
| 5 | 6
|
| 0110
| 6 | 7
|
| 0111 | 7 | 10
|
| 1000
| 8 | 20
|
| 1001
| 9 | 30
|
| 1010
| 10 | 40
|
| 1011
| 11 | 50
|
| 1100
| 12 | 60
|
| 1101
| 13 | 70
|
| 1110
| 14 | 80
|
| 1111
| 15 | 90
|
---
#### EC60870-5-101 Implementation Guide
##### Protocol Overview
The device implements IEC60870-5-101 protocol with the following key functions:
##### Reading States (Interrogation)
- C\_IC\_NA\_1 (100)
- Reading all inputs and outputs states
- Inputs: 1000-1007
- Outputs: 2000-2003
##### Controlling Outputs
- Function: C\_SC\_NA\_1 (45)
- Purpose: Setting individual output states
- IOA range: 2000-2003
- Values: ON (1) / OFF (0)
#### Command Structure
##### General Interrogation Command
```
Type ID: 100 (C_IC_NA_1)
Qualifier: 20
Cause of Transmission: 6 (Activation)
Common Address: 1
```
##### Single Command (Output Control)
```
Type ID: 45 (C_SC_NA_1)
Cause of Transmission: 6 (Activation)
Common Address: 1
IOA: 2000-2003
Value: 0/1
```
#### SCADA system configuration
##### IEC60870-5-101 Protocol Configuration
- Common Address (ASDU): 1
- Frame format: FT1.2
- Link Layer Address: according to device configuration
##### I/O Points Configuration:
For inputs (8 channels):
- Type: Single Point Information (M\_SP\_NA\_1)
- IOA addresses: 1000-1007
- Direction: Monitoring (read)
For outputs (4 channels):
- Type: Single Command (C\_SC\_NA\_1)
- IOA addresses: 2000-2003
- Direction: Control (write)
Verification:
- Check if input states are correctly read (IOA 1000-1007)
- Confirm control operation for each output (IOA 2000-2003)
- Verify device responds to General Interrogation