VIPA CPU 21 Series - Page 280

Chapter 9 Deployment CPU 21xSER-1 Manual VIPA CPU 21x
9-22 HB103E - Rev. 05/45
This function allows to read the slave word by word.
Command telegram
RTU/ASCII-
frame
Slave-
address
Functions
code
Address
1
st
Word
Number of
words
RTU/ASCII
frame
1Byte 1Byte 1Word 1Word 1Word
Respond telegram
RTU/ASCII
frame
Slave
address
Functions
code
No. of read
Bytes
Data
1
st
Word
Data
2
nd
Word
...
RTU/ASCII
frame
1Byte 1Byte 1Byte 1Word 1Word 1Word
max. 125 Words
This function allows to alter a Bit in your slave. A status change happens
via "Status Bit" with the following values:
"Status Bit" = 0000h → Bit = 0, " Status Bit" = FF00h → Bit = 1
Command telegram
RTU/ASCII
frame
Slave
address
Function
code
Address
Bit
Status
Bit
RTU/ASCII
frame
1Byte 1Byte 1Word 1Word 1Word
Respond telegram
RTU/ASCII
frame
Slave
address
Function
code
Address
Bit
Status
Bit
RTU/ASCII
frame
1Byte 1Byte 1Word 1Word 1Word
Read n Words
03h, 04h
Write 1 Bit
05h