Installation and Operating Handbook
3.2.5.1
Instruction 4, Sub Instruction ’2’ (TCP Port Status Request)
Table 3.16: TCP Port Status Request message format (instruction 4, sub instruction ’2’)
Message
byte no.
Set value / example
Length
(bytes)
Description
1
02
1
STX
2
7
1
Number of bytes
3
32
1
Unit address
4
4
1
Instruction number
5
'2'
1
Sub instruction
6
?
1
Checksum
7
03
1
ETX
TLTR3100
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