Encyclopedia

ABB 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 layerRP570 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 posLengthValueDescription
0 1 0x10 Start character
1 1 Address
2 1 Function
3 1 Checksum
4 1 0x16 Stop character

Variable length frame

Byte posLengthValueDescription
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).