Omron NT11 - 01-2004 User Manual page 42

Connection to a PLC by the Host Link (RS-232C Type)
Connecting to a CS/CJ-series Serial Communications Unit
CPU Bus Unit Settings
When connecting to a CVM1/CV-series Host Link Unit, set the following com-
munication conditions for the CPU Bus Unit settings.
Item
Baud rate
Transfer code
Parity
1-to-1, 1-to-N
Command level
*1 Set the Host Link baud rate up to 115,200 bps with the memory switch at
the NT11. For details, refer to Setting the Host Link Method (page 74).
*2 The 1-to-N setting enables BCC (Block Check Character). It is not actually
possible to connect more than one NT11 in a single Host Link.
Set the CPU Bus Unit settings directly from a Programming Device (e.g.,
SYSMAC Support Software).
For details on the CPU Bus Unit settings, refer to the SYSMAC CVM1/CV-
series Host Link Unit Operation Manual (W205-E1-@).
Setting the Front Switches
Communications port 1
(RS-232C)
Communications port 2
(RS-232C/RS-422A)
I/O port selector switch
RS-232C
RS-422A
CS/CJ-series Rack-mounted Unit: CS1W-SCU21CJ-series:
CJ1W-SCU41 (Port 2 is an RS-232C Port.)
Setting the Front Switches
Set the unit number of the Serial Communications Unit by using the rotary
switch located on the front panel. Set each switch with a flat blade screwdriver
Setting at Host
Set the same baud rate as set at the NT11
ASCII, 7 data bits, 2 stop bits
Even
(*2)
1-to-N
Level 1, 2, 3
• Unit # (SW3, SW4)
When using communication port 2, set these
switches to 0.
• I/O port selection (selector switch)
Set this to RS-232C.
• CTS selection (Pins 2 and 3)
Set pin 2 or 3 to ON. (Set this always to 0 V.)
To use communication port 1, turn ON pin 2.
To use communication port 2, turn ON pin 3.
• Communication condition setting (Pin 1)
Set this pin to OFF.
Communication is executed in accordance with the
CPU Bus Unit system settings made at the PLC. The
initial values for the system settings are as follows.
- Baud rate: 9,600 bps
- Parity: Even
- Xon/Xoff control: Not executed
- Communication method: Full duplex
- Stop bits: 2 stop bits
- Data length: 7 bits
Section 2-4
(*1)
29