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GFK-1004B
Chapter 3 The GEnet System Manager–Station Configuration
These Soft Switches are set to default values during manufacture of the LAN Interface
and are retained indefinitely until changed by the user, normally via the Logicmaster 90
Configurator. For a LAN Interface, the Logicmaster 90 Configurator has access only to
these Soft Switch parameters. All other parameters of the LAN Interface are set using
the GSM.
The communications software, along with all other configuration information, is set and main-
tained on the GSM, and must be downloaded to the LAN Interface when a software or
configuration change is required. This information is stored on the LAN Interface in ei-
ther battery-backed RAM . This memory technology permits ready change of the
memory content (via downloading from the GSM).
Connecting the GSM to the LAN Interface
The GSM may be carried to the station and connected to the LAN Interface with an
RS-232 cable. We refer to this method of connection as local communications mode or
local GSM operation.
Alternatively, the GSM can reside at a central location on the network and “logically”
connect to any station over the Ethernet network. We refer to this method of connection
as network communications mode or network GSM operation.
You must choose which mode of operation you desire.
When using RS-232, the serial cable is connected between the LAN Interface 9-pin con-
nector and the personal computer COM1 port. See Appendix B for serial port character-
istics.
To connect to the LAN over the network, you must have an appropriate network card or
PCMCIA adapter for your PC-Compatible computer. See Table 3-1 for a list of sup-
ported interfaces.
Figure 3-1 illustrates these alternative connection means of the GSM. The GSM may use
either an internal or external transceiver; or none if used exclusively for local operation.
Note
We recommend there be only one GSM on the network. It will contain
configuration information and communications software for all the
GEnet stations on the network.