IAI America S-SEL-E - Manual (Page 217)

Page 212

Loop Connection
There are two methods of connecting controllers with SEL NET. The first diagram shows a loop connection while the
second shows a two-way connection. You can program the network using either method but the two-way connection does
not distinguish between the [SND] and [RCV] connectors as the data is both sent and received from one connector. In
SEL NET, hardware settings are not required since the program manages all controller codes and data transmission
formats. The only hardware preparation required is the connection of the SEL NET cables
(3) SEL NET Structure · Connection
There is an [RCV] and an [SND] connector on the front panel of the Super SEL controller for connecting the SEL NET.
The [RCV] and [SND] connectors for each controller are connected with the optional SEL NET cable as shown in the
illustration below.
‚
Two-Way Connection
(4) SEL NET Specifications
Note: There are no hardware limitations but when setting the number of
nodes, take into consideration that the more nodes there are, the longer
the transmission time.
Item Specification
Maximum no. of network nodes No limitations (see note)
Maximum distance between stations 15m
Method of connecting the network Loop connection · Two-way connection
Transmission speed 1200·2400·4800·9600·19200·38400BPS
Network Interface SEL NET (Based on RS232C)
(5) SEL NET cable (optional)
Please be sure to use the SEL NET cable which is offered
as an optional accessory. The package includes cable for
connecting the individual controllers and cable for con-
necting the controller to the PC.
Note: The SEL NET network uses the extended com-
mand set of Super SEL language which requires the PC
interface software (DOS 2.0 or higher, Windows 1.0 or
higher). (The extended commands cannot be used with
the teaching pendant). For details on the extended com-
mands, please refer to the instruction manual that comes
with the Super SEL controller.
Chapter 5. Option