RP570 protocol
Introduction
RP570 = ABB S.P.I.D.E.R. RTU Protocol 570
RP570 is a protocol used between an RTU (Remote Terminal Unit) in a substation and the FE (Front End), which is usually the SCADA software in the Control Centre.
RP570 was developed by ABB in beginning of 1990. It was based on IEC 57 part 5-1, presently known as IEC 60870. Known variations are RP571, ADLP80 and ADLP180.
| 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)
- stop bit
Fixed length frame
| Byte pos | 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 pos | 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 done...
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).