5 Implementation of Modbus TCP
5.9 Parameters of the modules
86
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10/2011 MN05002008Z-EN
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1
0
Stop bits
0 = 1 bit
A
1 = 2 bit
2,1
Parity
00 = none
01 = odd
A
– The number of the bits set (data bits
and parity bit) is odd.
10 = even
– The number of the bits set (data bits
and parity bit) is even.
3
Data bits
0 = 7
A
– The number of data bits is 7.
1 = 8
– The number of data bits is 8.
5,4
Data flow control
00 = none
A
– the data flow control is deactivated
01 = XON/XOFF
– Software-Handshake (XON/XOFF) is
activated
10 = RTS/CTS
– Hardware-Handshake (RTS/CTS) is
activated.
7,6
reserved
2
XON-character
0 – 255 (17
A
)
XON-character:
This character is used to start the data
transfer of the data terminal device (DTE)
when the software-handshake is acti-
vated
3
XOFF-character
0 – 255 (19
A
)
XOFF-character:
This character is used to stop the data
transfer of the data terminal device (DTE)
when the software-handshake is acti-
vated
Table 32:
Module
parameters
Byte Bit
Parameter
name
Value