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Set the CPU Bus Unit settings directly from a Programming Device (e.g. CX-Programmer).
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
Connecting to a CS-series Serial Communications Unit
CS-series Rack-mounted type: CS1W-SCU21(-V1)
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 so that the values or symbols in
the setting value window agree with the following.
Allocation DM Area Settings in CPU Unit
Settings are written from the Programming Device (a Programming Console or
CX-Programmer) directly into the allocation DM area (system setting area) of the CPU Unit.
After the settings are written, they become effective by turning the power ON, restarting the
unit, restarting the communications port, or execution of the STUP command.
In the following, the words allocated in the DM area and the settings are shown.
• 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 (DIP SW2 and SW3)
Set SW2 or SW3 to ON. (Set this always to 0V.)
To use communication port 1, set SW2. To use
communication port 2, set SW3.
• 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 PLC. The
initial values for the system settings are as follows.
- Communications speed: 9600 bps
- Parity: Even
- Xon/Xoff control: Not executed
- Communication method: Full duplex
- Stop bits: 2 stop bits
- Data length: 7 bits
Set the unit number to 0 through F so that it will
not overlap with the numbers used in other
units.
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