Comtrol UP DeviceMaster User Guide - Manual (Page 47)

DeviceMaster UP Modbus/TCP User Guide: 2000447 Rev. I Chapter 2. Programming Interface - 47
Instance Attribute Definitions
Attribute 41
Application Transmit
ETX Append Value
You can set this attribute to append an ETX (end of transmission) byte sequence
which is configurable as 1 or 2-bytes to the end of the Ethernet packet before it is
sent. The length indicates the number of ETX bytes. The valid values for length are:
• 0 (zero)
‐ Setting this attribute to zero disables this function.
• 1 (one ETX byte)
‐ Inserts one ETX byte at the end of the data.
• 2 (two ETX bytes)
‐ Inserts two ETX bytes at the end of the data.
• Value1
‐ Specifies the transmit character associated with the first ETX byte. (Only if the
length is not zero.) You can specify a value between 0 and 255.
• Value2 - Specifies the transmit character associated with the second ETX byte.
(Only if length is 2-bytes.) You can specify a value between 0 and 255.
Attribute Description (Continued)