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5-2SectionConnecting to the Host’s RS-422A/485 Port
107
Setting the Front Switches
Communications port 1
(RS-232C)
Communications port 2
(RS-232C/RS-422A)
I/O port selector switch
RS-422A
@ Unit # (SW3, SW4)
Set these switches to 0.
@ Communication condition setting (DIP SW1)
Set this switch to OFF.
Communication is executed in accordance with the
CPU bus unit system settings made at the PC. The
initial values for the system settings are as follows.
- Communications speed: 9,600 bps
- Parity: Even
- Xon/Xoff control: Not executed
- Communication method: Full duplex
- Stop bits: 2 stop bits
- Data length: 7 bits
@ I/O port selection (selector switch)
Set this to RS-422A.
RS-232C
@ Terminator setting (selector switch)
Set this to ON.
Connecting to a CPU Unit
CVM1/CV-series (-EV
j) CPUs
• CV500-CPU01-EV1/CV1000-CPU01-EV1/CV2000-CPU01-EV1
• CVM1-CPU01-EV2/CVM1-CPU11-EV2/CVM1-CPU21-EV2
PC Setup
When connecting to a CVM1/CV series CPU, set the following communication
conditions for the PC Setup.
Item Setting at Host
Communications speed Set the same speed as for the NT31/NT31C.
(*1)
Stop bit 2 stop bits
Parity Even
Data length ASCII 7 bits
Unit # 00
*1 Set the host link communications speed at 9600 bps or 19200 bps with the
Comm. Speed memory switch at the NT31/NT31C. For details, refer to Setting
the Host Link Method (page 158).
Either set PC Setup directly from a Programming Device (e.g. SYSMAC support
software), or transmit the PC Setup made at a Programming Device to the CPU.
For details on the PC Setup, refer to the SYSMAC CVM1/CV500/CV1000/
CV2000 Operation Manual: Ladder Diagrams (W202-E1-j).