RP570 Protocol
The RP570 protocol is an ABB proprietary protocol developed in the beginning of 1990. It was based on IEC 60870. Known variations are RP571, ADLP80 and ADLP180.
The protocol is used between an RTU (Remote Terminal Unit) in a substation and a control center.
Protocol Layers
| ISO/OSI Layer | RP570 Layer |
|---|---|
| 7. Application layer | Application layer |
| 6. Presentation layer | |
| 5. Session layer | |
| 4. Transport layer | Link layer |
| 3. Network layer | |
| 2. Data link layer | |
| 1. Physical layer | Physical layer |
Physical Layer
Usually a RS232 (V.24) serial connection.
Link Layer
Usually:
- 1 start bit
- 8 data bits
- 1 parity bit (even)
- 1 stop bit
Fixed Length Frame
| Byte Position | Length | Value | Description |
|---|---|---|---|
| 0 | 1 | 0x10 |
Start character |
| 1 | 1 | - | Address |
| 2 | 1 | - | Function |
| 3 | 1 | - | Checksum |
| 4 | 1 | 0x16 |
Stop character |
Variable Length Frame
| Byte Position | Length | Value | Description |
|---|---|---|---|
| 0 | 1 | 0x68 |
Start character |
| 1 | 1 | N | Length (2-255 bytes) |
| 2 | 1 | N | Length (2-255 bytes) |
| 3 | 1 | 0x68 |
Start character |
| 4 | 1 | - | Address |
| 5 | 1 | - | Function |
| 6 | N-2 | - | Data |
| 5+N | 1 | - | Checksum |
| 6+N | 1 | 0x16 |
Stop character |
Application Layer
To be documented...
SerialMon Support
- Fixed and variable length frames
- Partial decoding of IDS, IDM, AVS, AVM, FCOM and TEV packets
- Tracking of binary and analog blocks (addresses)
