Omron SYSMAC C Series - Page 60

System expansion and peripherals
Since the remote I/O master unit serves to contro! the optical transmitting
I/O unit as well as the I/O link unit, it can be used to configure a system in
which both types of units are used together with a remote 1/O slave unit.
This means a distributed system using a number of SYSMAC PCs is
possible.
Applications
For interlocking pieces of equipment or stations, high-speed data
transmission/reception, improving line noise immunity, reducing wiring
requirements.
SYSBUS system
Controller
Remote I/O master unit
ess VO bus (SYSBUS) J
Features
Cea boners Long-distance, high-speed data communication realized by an optical
/O unit, transmission system with excellent noise immunity. Because only a single
1/0 link unit, etc. --:
pair of optical-fiber cables is used as the communication line, the amount
Controller/component
of wiring can be significantly reduced.
Specifications
Communication system
Communication format
Transmission speed
Transmission system
Bidirectional, half-duplex
1:N
187.5k bps
Time-division multiplexing
Start-stop synchronization
Exclusive process (cyclical control
system)
64 max. (with a transmission
capacity of 8 points each)
Doubie-core optical-fiber cable
(crystal polymer, core diameter:
250um)
Synchronization system
Transmission control process
Number of stations possible
V0
Link
unit
Transmission
lines
1 RUN OUT terminals
Used to monitor the operating status of the I/O link unit. Output signals are
issued from these terminals when power is applied to the C20 CPU and to
the I/O link unit with the PC connected to the remote I/O master unit. The
PC must be in RUN or MONITOR mode.
wr
®
2 LED power indicator
Turns on when power is applied to the I/O link unit.
3 LED indicator for transmission/error indication
Blinks during normal transmission. A steady glow indicates a transmis-
sion or bus error has occurred.