Omron Programmable Terminals NT631 Setup Manual page 69

Connecting to the RS-232C Port at the Host
52
C1000H/C2000H Rack-mounting Unit: C500-LK203
Setting the Rear Switches
5 V supply
ON
OFF
I/O port
RS-422A
RS-232C
Synchronization
Internal
External
Terminator
OFF
ON
CTS
0 V
External
C200H/C1000H/C2000H CPU-mounting Unit: 3G2A6-LK201-EV1
Setting the Rear Switches
SW1
SW2
SW3
• I/O port selection (selector switch)
Set this to RS-232C.
• Unit #, parity, and transfer code
8
(DIP SW1-1 to SW1-7)
7
6
Set SW1-1 to SW1-7 to OFF (0).
5
SW1
4
3
2
1
ON
• Synchronization (selector switch)
Set this to Internal.
8
7
6
• Communications speed
SW2
5
(DIP SW2-1 to SW2-4)
4
3
Set these switches to 0010 to select
2
19,200 bps.
1
ON
Set these switches to 1010 to select
9,600 bps.(0: OFF 1: ON)
• 1-to-1/1-to-N selection (DIP SW2-6)
Set SW2-6 to OFF (0) (1-to-N).
• Instruction level (DIP SW2-7, SW2-8)
Set these switches to ON (1).
(Levels 1, 2, and 3 are enabled.)
• CTS selection (selector switch)
Set this always to 0 V (ON).
• Unit #, parity, and transfer code
(DIP SW1-1 to SW1-5)
Set SW1-1 to SW1-5 to OFF (0).
* Parity is fixed at Even Parity. Transfer code is
fixed at ASCII 7 data bits and 2 stop bits.
• Communications speed (DIP SW2-1 to SW2-4)
Set these switches to 0010 to select 19200 bps.
Set these switches to 1010 to select 9600 bps.
(0: OFF 1: ON)
• 1-to-1/1-to-N selection (DIP SW2-6)
Set SW2-6 to OFF (0) (1-to-N).
• Instruction level (DIP SW2-7, SW2-8)
Set these switches to ON (1).
(Levels 1, 2, and 3 are enabled.)
• CTS selection (DIP SW3-1 and SW3-2)
Set SW3-1 to ON (1), and SW3-2 to OFF (0).
(Set this always to 0V.)
• Synchronization (DIP SW3-3 to SW3-6)
Set SW3-3, SW3-5, and SW3-6 to ON (1), and
SW3-4 to OFF (0). (Set these to Internal.)
Section 4-1