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MSS User Guide 4: Configuration
4-7
LAT Configuration
Note: The following section on LAT configuration applies to the MSS100 only.
Three LAT parameters can be configured for the MSS: the device server’s identification
string, its service group list, and its internal circuit timer.
Server Identification
The MSS has a default name that it uses when announcing itself to the LAT network
(mss_xxxxxx where xxxxxx represents the last six characters of its hardware address).
Users can change the name. Users can also configure a more descriptive identification
string.
Figure 4-16: LAT Name and Identification
Local> CHANGE NAME “Bio5”
Local> CHANGE LAT IDENTIFICATION “Biolab 2”
Service Groups
A service is any resource on the network that can be accessed locally or via a network
connection, such as a modem. The MSS serial port and the services on the network each
belong to one or more service groups. When a user or device requests a connection to a
service, the LAT host will check the service groups to which both the requester and the
service belong. If any group number is common to both, the connection attempt will
continue. If not, access will be denied.
The Change LAT Groups command establishes group numbers for the MSS and its
serial port.
Figure 4-17: Changing Service Groups
Local>> CHANGE LAT GROUPS 1,7,13,105,210-216
Note: Each time the Change LAT Groups command is entered, the previous group list is
replaced.
Circuit Timer
Message transmission on LAT networks is controlled by timers. The MSS circuit timer
specifies when messages will be sent from the device server to other network nodes.
This timer value is set to a standard default at the factory and should not need to be
changed.
If you need to change the length of the circuit timer, use the Change LAT CircTimer
command followed by a timer value integer. The timer value can range from 30 to 200
milliseconds.
Figure 4-18: Changing Timer Delay
Local>> CHANGE LAT CIRCTIMER 50