Operating The Network - Omron CJ1W-PNT21 Operation Manual

Operating the network

7-6

Operating the network

7-6-1 User Access to the Network
Access to the Unit
!Caution
7-6-2 Changing the Output Data state of the IO Controller.
II/O Data state
There are several ways through which a user can have access to and control
over the PROFINET IO network.
• Through a PLC user program
A PLC user program can set the operational mode of the Unit, read IO
Controller and IO Device status / diagnostics information, and access the
Unit's Error Log. Furthermore, the I/O data transferred between the
PROFINET IO network and the PLC memory, and can be used by the user
program.
• Through CX-ConfiguratorFDT
The CJ1W-PNT21 IO Controller DTM Diagnosis User Interface provides
the user with buttons to set the operational mode of the Unit, read IO
Controller and IO Device status information, and access the Unit's Error
Log.
• Through any other CX-Server based program, capable of accessing PLC
memory areas and communicating through FINS messages, e.g. CX-
Programmer, CX-Supervisor, etc.
This section will explore both means to control the CJ1W-PNT21 PROFINET
IO Controller Unit.
The CJ1W-PNT21 IO Controller DTM Diagnosis User Interface provides the
means to control the Master Unit directly from CX-ConfiguratorFDT, running
on a PC.
For access to the Unit's controls, an online connection with the Unit has to be
established first. To achieve this perform the following sequence.
1,2,3... 1 To go on line, select the DTM in the Network view, and perform one of the
following actions.
• Select the Device - Go Online option from the main menu, or the DTM
context menu, or
• Select the Online button from the Tool Bar.
2 A communication channel will be opened through CX-Server. The name of
the DTM in the Network view, will turn to Italic font, to indicate that the Unit
is on-line.
3 From the context menu, select the Diagnosis option. The DTM's
Diagnostics User Interface will be displayed.
Controlling the CJ1W-PNT21 PROFINET IO Controller Unit from the CJ1W-PNT21 IO
Controller DTM Diagnosis User Interface, may interfere with a PLC user program
running at the same time. This can result in unexpected behaviour. It is recommended
to change the PLC CPU mode to PROGRAM mode to avoid this interference, during
the use of the CJ1W-PNT21 IO Controller DTM Diagnosis User interface.
The PROFINET IO standard defines the Provider State of I/O data, further
called the I/O Data state. With this a PROFINET IO Controller or Device can
signal if the data it provides is reliable, if it is Valid or Invalid. I/O Data that is
marked as invalid is discarded by the receiving device.
The Output Data state of the IO Controller is controlled in two ways:
Section 7-6
111