8
with 3G2A9-AL002-E or 3G2A9-AL002-PE Link Adapters, the 3G2A9-AL004-E
or 3G2A9-AL004-PE Link Adapter would be replaced with a 3G2A9-AL004-E or
3G2A9-AL004-PE Link Adapter and then 3G2A9-AL004-E or
3G2A9-AL004-PE Link Adapters would be inserted before each PC to convert
back to wire cable. The maximum transmission distance varies with the Link
Adapter and the kind of optical fiber cable as follows:
Cable 3G2A9-AL002-PE
3G2A9-AL004-PE
3G2A9-AL002-E
3G2A9-AL004-E
APF 20 m Connection impossible
PCF 200 m 800 m
APF: all-plastic fiber; PCF: plastic-clad fiber
1-3 Communications Specifications
The specifications of the host interface on the PC’s CPU are as follows:
Communications method Four-wire, half duplex
Synchronization method Start-stop, 1 or 2 stop bits (set in PC Setup)
Baud rate 1200/2400/4800/9600/19200 bps (set in PC Setup)
Transmitted code 7- or 8-bit ASCII (set in PC Setup)
Error detection Vertical parity, even/odd (set in PC Setup)
Interface RS-232C/RS-422 (set on selector on CPU)
Transmission distance RS-232C: 15 m max.; RS-422: 500 m total max.
(See details under System Configuration.)
The following are the communications specifications of the Host Link Unit. (The
general specifications of the Host Link Unit are the same as those of the CV-se-
ries PCs.)
Item Port 1 Port 2
Interface RS-232C RS-232C or RS-422 (selectable)
Communications method Half duplex or full duplex; Set in CPU Bus
Unit System Setup.
RS-232C: Half duplex or full duplex; Set in
CPU Bus Unit System Setup.
RS-422: Full duplex
Synchronization method Start-stop, 1 or 2 stop bits; Set in CPU Bus
Unit System Setup.
Start-stop, 1 or 2 stop bits; Set in CPU Bus
Unit System Setup.
Baud rate 1200, 2400, 4800, 9600, or 19200 bps; Set
in CPU Bus Unit System Setup.
1200, 2400, 4800, 9600, or 19200 bps; Set
in CPU Bus Unit System Setup.
Transmitted code 7- or 8-bit ASCII; Set in CPU Bus Unit
System Setup.
7- or 8-bit ASCII; Set in CPU Bus Unit
System Setup.
Error detection Vertical parity, even/odd/none; Set in CPU
Bus Unit System Setup. FCS (frame
checksum sequence)
Vertical parity, even/odd/none; Set in CPU
Bus Unit System Setup. FCS (frame
checksum sequence)
Transmission control Xon/Xoff control; Set in CPU Bus Unit
System Setup.
Xon/Xoff control; Set in CPU Bus Unit
System Setup.
Transmission distance 15 m max. RS-232C: 15 m max.;
RS-422: 500 m total max.
Communications Specifications Section 1-3