Omron CJ1W-PNT21 Operation Manual page 109

Configuring the IO Controller
Device No.
Device Name
Device Type
IP Address
Update Rate
Watchdog Time / Data Hold
Time
The Device No. is assigned by the IO Controller DTM and is used in several
places. As the IO Controller can not easily handle names Device No. are used.
The functions where the Device No is used are:
• In the Connection and Diagnostics information screen of the IO-Controller.
• In the IO Device Input Valid (Word n+9 ~ Word n+16) and New Alarm flags
areas (Word n+17 ~ Word n+25).
• Reading New Alarms from the IO Controller.
• FINS routing through the IO Controller to determine FINS address to IP-
address.
The Device Name is the name set in the IO Device in the Network Scan sub
item in the PROFINET Identification. The Device Name entered here must be
an exact match with what is entered in Network Scan sub item. Only lower
case characters, numbers and the - sign are allowed.
The Device Name is the used to identify the IO Device on the PROFINET
network.
The Device Type is read by the IO Controller DTM from the IO Device DTM. It
can not be changed.
The set IP Address is what the IO Controller sets in the IO Device found by its
Device Name. This is over writing the IP Address the IO Device maybe
already has. Any IP based communication to the IO Device must be done to
the IP Address set by the IO Controller if the IO Controller is in data-exchange
with the IO Device.
The IP Address of the IO Device must be in the same subnet as the IO
Controller.
The Update Rate is the time in milliseconds that data is refreshed between the
IO Controller and the IO Device. The settings range is from 8 to 512ms. If the
Update Rate is set to fast for a bigger configuration then it could be that IO
Controller can not service all IO Devices.
The Update Rate is the base for the calculation of the Watchdog Time and the
Datahold Time
The Watchdog Time and the Data Hold Time are set in the IO Device by the IO
Controller during start of the PROFINET IO communication.
The Watchdog Time is used by the IO Device and the IO Controller to
determine when to close the PROFINET IO connection. If the time since the
last update has exceeded the Watchdog Time then the IO Device and the IO
Controller will close the PROFINET IO connection. The IO Controller must set
up the PROFINET IO Connection again to communicate with the IO Device.
The IO Device will keep its outputs set to till the Data Hold time is reached.
Both the Watchdog Time and the Data Hold Time start counting since the last
IO Data Exchange.
When using network redundancy with for example MRP set the Watchdog
Time and the Data Hold Time to a value that the connections will not time out
when problems on the network occur. Also check if the Watchdog Time and
Data Hold Time set are sufficient when the network is brought to a normal
state.
After making the changes, select the Apply button in the lower right corner of
the user interface to accept the changes. Next select the IO Device Area to set
the memory locations where the I/O data for the IO Devices resides in PLC
memory.
Section 7-4
95