User Manual

Cerberus Division

Glossary

e1754.doc

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

land 1999

02.99 15

6 Glossary

CMS Pad This pad is in charge to manage communication to and from the CMS/LMS supervis-

ing system. Usually there is only one CMS Pad in a gw-20, but in redundant configu-

ration up to two can be provided.

CMSDL It is the protocol used to communicate between gateway and CMS/LMS supervising

system.

Initiating message A message that starts up a reaction program. It is a telegram sent to the supervising

system by one of the subsystem. The gateway intercepts this message and, if it has

been configured to do so, starts to send the messages contained in the reaction pro-

gram to the subsystems connected to it.

Interactions The interactions are activities that a subsystem connect to a gateway perform on the

basis of a message issued by a different subsystem connected to the same gateway.

The interactions are shortcuts to counteract in a fast and reliable way some event that

requires immediate action.

Reaction program The reaction program is a sequence of messages to be issued to one or more of the

subsystems connected to the gateway after that the corresponding initiating message

has been issued.

SLTA Serial Lon Talk Adapter. A device used to let the PC communicate through the serial

port to a LonTalk protocol device, such as the Gateway GW-21.

Subsystem Pad This type of generic pad manages the communications to and from the subsystems.

Depending on the model and configuration, a gateway GW-20 can have up to 5 sub-

system pads, for up to 20 serial lines toward subsystems.

Supervision Pad The Supervision Pad is a Pad that controls the gateway functioning and that is capa-

ble to drive a synoptic panel as well as to log on paper of messages received from the

field. There is only one Supervision Pad inside a gateway.

NETPAD A Pad designed for two level networks. It is used to connect a GW-21 to the GW-20 it

is inserted into.