Specifications

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Message Request of Data Section 5-7
5.7.1 Structure Message Header (10 bytes) Request of Data
Function ASCII Hex Comment
1. Byte Message 00 always 00
2. Byte identifier 00 always 00
3. Byte Data direction E 45 E = Request
4. Byte Command see below
5. Byte 2 Byte see below
6. Byte Source
7. Byte 2 Byte see below
8. Byte Number of bytes
9. Byte Coordination flag number FF indicates no
10. Byte coordination flag bit FF Coord. flag
5.7.2 Data Specification in the Message Header
The data types of the PLC addressed by the terminal are implemented in the mes-
sage header by the Bytes 4 - 8 as illustrated below.
Source Access Data type Command Word-Parameter Byte-Parameter Number in
Byte 4 Byte 5+6 Byte 5 Byte 6 Byte 7+8
Input Bit E E Offset Bit-No 1 Byte
Output Bit A A Offset Bit-No 1 Byte
Flag Bit M M Offset Bit-No 1 Byte
Input Byte EB E Offset n Bytes
Output Byte AB A Offset n Bytes
Flag Byte MB M Offset n Bytes
Input Word EW E Offset n Bytes
Output Word AW A Offset n Bytes
Flag Byte MB M Offset n Bytes
Input D-Word ED E Offset n Bytes
Output D-Word AD A Offset n Bytes
Flag D-Word MD M Offset n Bytes
D-Block Word DW D DB DW n Words
High-Byte DB Byte DL D DB DW 1 Word
Low-Byte DB Byte DR D DB DW 1 Word
D-Block D-Word DD D DB DW n Words
Timer Word T T Offset n Words
Counter Word Z Z Offset n Words