Specifications

1070 072 131-102 (96.08) GB
BUEP64 Protocol 9-15
9.9 Transfer Message Formats
9.9.1 Transmission Header and Data
The message header consists of 10 bytes.
Byte
──────────────────────────────────────────────────────
1 00 (FF) Identifier for message header
(transfer completion sequence header)
──────────────────────────────────────────────────────
200
──────────────────────────────────────────────────────
3 (ASCII) Command
4 (ASCII) Command type
──────────────────────────────────────────────────────
5 (High) Destination or source identifier
6 (Low)
──────────────────────────────────────────────────────
7 (High) Data volume
8 (Low)
──────────────────────────────────────────────────────
9 (High) Coordination marker
10 (Low)
──────────────────────────────────────────────────────
11 Data
12
.
.
n
──────────────────────────────────────────────────────
n+1 DLE end identifier,
n+2 ETX/ETB
n+3 BCC
──────────────────────────────────────────────────────
Byte designations:
-1- Message identifier 00 (or FF for transfer completion sequence)
-2- Message identifier (00)
-3- Command, SEND = 'A', FETCH = 'E'
-4- Command type, type of data to be transferred
'D' = Data module
-5,6- Destination address for SEND, source address for FETCH
-7,8- Number of user data to be transferred in words.
-9,10- Coordination marker