User Manual

Foreign Subsystem Integration - Engineering Guidelines

E1144.DOC

Data and design subject to change without notice. Supply subject to availability

01.94 17[23]

Security point

ALARM NOT

ACKNOWLEDGED

alarm event

alarm reset

Security point

NORMAL

Security point

ALARM

ACKNOWLEDGED

alarm

acknowledge

subsequent

alarm

Fig. 5.3

In order to allow a complete control of the ack and reset functions, LMS modular handles a specific attribute information

associated to each point state.

Basically, besides the 0 to 15 point state value, the change of state" message (and consequently the LMS modular

database) also contains a treatment flag that indicates whether that specific state is:

• normal, i.e. any pending event can be deleted

• abnormal, and ack is necessary or not

• abnormal, and reset is necessary or not

The table below shows the complete list of cases for the LMS modular treatment flag.

Value Status Behaviour

0 normal no acknowledgement command is issued; no reset

command is issued; LMS modular can delete any pending

event.

1 abnormal not to be acknowledged, not to be reset; no

acknowledgement command is issued; no reset command

is issued.

2 abnormal to be acknowledged, not to be reset;

acknowledgementcommand is issued; no reset command is

issued;

3 abnormal not to be acknowledged, to be reset; no acknowledgement

command is issued; reset command is issued;

4 abnormal to be acknowledged, to be reset; acknowledgement

command is issued; reset command is issued