NORD USS and Modbus RTU Manual
22 Subject to technical amendments BU 0050 GB-3111
1.3.7 Response Delay Time
The time interval between the last character of the order telegram (BCC) and the start of the response
telegram (STX) is called the response delay time t
AVZ
. The maximum permissible response delay time is
20ms, however, it must not be smaller than the start pause. If the addressed participant does not
respond within the maximum permissible response delay time, an error message is saved in the master. The
master then sends the telegram which is intended for the next slave.
The minimum response delay time which is to be observed for the various baud rates can be found in the
Master Telegram Time table in the Additional Information section.
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