104 Protocol - IEC 60870-5-104 Address Convertor

ASDU <=> CASDU

ASDU Address

CASDU1

CASDU2

IOA <=> IOA1/2/3

IOA Address

IOA1

IOA2

IOA3

.

IEC 60870-5-104 Packet Structure

Start Character

APDU Length

Control Fields

I Format

S Format

U Format

Application Service Data Unit (ASDU)

Type ID

VSQ

COT

ASDU Addr

IOA

Info Object(s)