semaphore TBOX LT2-530 Series, User Manual, Page: 47 / 197

Version : 1.09 47
Disconnect ModBus address at program stop: all variables will have their ModBus address
disconnected, which means that external equipment accessing the RTU will receive
communication error.
This feature has been implemented to allow a SCADA detecting immediately a TBox is
stopped: as the ModBus addresses are not available, the RTU stays in communication
but returns an 'Exception' error.
Stop program with toggle switch stop: when this feature is active, you have to select the Tag
corresponding to the toggle switch 'Stop' in front of the CPU (See in the Resources

CPU

Group 1).
Pressing the toggle switch will stop the program (Process, Alarms, Datalogging, ModBus
Transactions, ...)
NO other digital input than 'Stop' toggle switch can be used, but any internal digital
register can.
7.6.2. Alarms
Event stack: is a public stack, accessible by users, where alarms are available with date, time,
recipient, message, status, ….
The Event stack can be displayed from the main menu: ‘Communication’

‘Retrieve
from TBox’

‘Alarms’.