This feature is useful only for redundancy architectures that rely on a variable in the CLP to be elected to indicate the time to switch the destination IP address. In the vast majority of cases, this type of Tag is not needed. If this is the case to apply to a project, this Tag must be a Boolean variable (BIT) that must vary its value before the configured time expires, and logically must be read with a fairly scan time lower than the expiration time, configured in the Watchdog period (ms) option on the ISOTCP / ISOTCP243 group of the MProt tab on the configuration window. Whenever this variable does not vary by that period, the IP address switch is then executed. To configure a Tag as a Watchdog, add a "/watchdog" String at the end of the syntax parameter Item, such as "DB2:DBX0.0/watchdog".