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VIPA System SLIO
Read n Bits 01h, 02h
Command telegram
Modbus/TCP-Header
x
x
0
0
0
6byte
Respond telegram
Modbus/TCP-Header
x
x
0
0
0
6byte
Read n words 03h, 04h
Command telegram
Modbus/TCP-Header
x
x
0
0
0
6byte
Respond telegram
Modbus/TCP-Header
x
x
0
0
0
6byte
HB300 | IM | 053-1MT01 | en | 19-40
Code 01h: Read n bits of master output area 0x.
Code 02h: Read n bits of master input area 1x.
Slave address
6
1byte
Slave
Function
address
code
1byte
1byte
03h: Read n words of master output area 4x.
04h: Read n words master input area 3x.
Slave address
6
1byte
Slave
Function
address
code
1byte
1byte
Function code
Address1. bit
1byte
Number of
Data 1. byte
read bytes
1byte
Function code
Address word
1byte
Number of
Data 1. word
read bytes
1byte
Modbus function codes
Number of bits
1word
Data 2. byte
1byte
1byte
max. 252byte
Number of words
1word
Data 2. word
1word
1word
max. 126words
Deployment
1word
...
1word
...
71
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