20 iso415R-x_D00401_00_M_XXEN / 04.2021
Operation and settings on the device
4.1.6.5 Write access to Modbus registers
The " PROTECT" function disables or enables write access to the Modbus registers of the parame-
ters. Via the Modbus register "Write access", write access can only be disabled, but no longer ena-
bled.
• If the T/R button is pressed for at least 20 seconds, the status LED changes
from steady green to flashing violet and remains in this state for 5 seconds
if the button is held down.
• If the T/R button is released during the period in which the status LED flash-
es violet, the state of the Modbus register "Write access" changes from the
current to the alternative setting, i.e. from "enabled" to "disabled" or vice
versa.
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