Instruction 4, Sub Instruction '2' (Tcp Port Status Request); Tcp Port Status Request Message Format (Instruction 4, Sub Instruction '2') - PEAK COMMUNICATIONS TLTR3100 Installation And Operating Handbook

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
Set value / example
byte no.
1
2
3
4
5
6
7
TLTR3100
Length
(bytes)
02
1
7
1
32 1
4
1
'2'
1
?
1
03 1
Peak Communications Ltd.
Description
STX
Number of bytes
Unit address
Instruction number
Sub instruction
Checksum
ETX
21