Spma (Single Port Multiple Access); What Is Spma; Using Spma - Omron NV Series Setup Manual

SPMA (Single Port Multiple Access)

6-4

SPMA (Single Port Multiple Access)

6-4-1

What Is SPMA?

Computer running NV-Designer
Note
6-4-2

Using SPMA

Connecting Online
Manually
Note
Example for the NV3W
1,2,3...
When the connections and setup are completed between the computer, PT,
and PLC, the PLC can be accessed from the computer (e.g., the CX-Pro-
grammer) using serial communications and communicating through the PT.
The ladder programs can be transferred and monitored. This function is called
SPMA (Single Port Multiple Access). It is supported only for CP-series and
CS/CJ-series PLCs.
CX-Programmer
Communicate through the PT.
Use the same cable as
for the NV-Designer.
This makes it possible to transfer and monitor ladder programs using the CX-
Programmer, with no need to change cable connections between the PT and
the computer running the NV-Designer.
(1) SPMA cannot be used only with CP-series and CS/CJ-series PLCs. It
cannot be used with the C-series or CVM1/CV-series PLCs.
(2) To use SPMA, use the following CX-Programmer versions:
CX-One version 3.2 or higher (CX-Programmer version 8.21 or higher)
No special SPMA settings are required at the PT. The PT is always ready.
Make the selection under Network Type in the CX-Programmer's Change PLC
Dialog Box.
To display the above items when connected to a CJ2 CPU Unit, select Display
All for the network type.
Set the Host Link unit number at the PLC to 0.
1. Select "NV-Thru (Serial Port)" for the network type.
2. Click the Set Button and set the Host Link Unit No. to 0.
Ladder diagrams can be transferred
and the PLC can be monitored from
the CX-Programmer.
Host Link connection
Also, there is no need to
change the cable between
the PT and PLC.
Section 6-4
CS/CJ/CP-series PLC
107