Communication Advanced Settings
Inter-Telegram Timeout Mode Settings
Figure 29. Advansed settings, Default (3.5 characters)
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By default, Inter-telegram timeout mode Default (3.5 characters) is used.
This is according the Modbus RTU standard, which advocates the use of a silent period equivalent to 3.5 characters between each message. The silent period is used to find out where one message ends and the next begins.
Figure 30. Custom settings, Inter-telegram timeout and Inter-telegram delay
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You can use Custom settings to set the desired Inter-telegram timeout and Inter-telegram delay.
The following must be applied on all nodes:
The time between two adjacent characters in the same telegram must be less than Intertelegram timeout.
The time between two characters in two different telegrams the same or more than Intertelegram delay.