Omron CJ1W-PNT21, Инструкции по эксплуатации

Страница: 135 / 202

5 Operation
5-12
CJ-series PROFINET IO Controller Unit Operation Manual for NJ-series CPU Unit (W511)
• In the IO Device Input Valid ( *_DevInDataValid ) and New Alarm flags areas ( *_DevAlm ).
• Reading New Alarms from the IO Controller.
• Message routing through the IO Controller to determine Device address and IP address.
 Device Name
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 Net-
work 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.
 Device Type
The Device Type is read by the IO Controller DTM from the IO Device DTM. It can not be changed.
 IP Address
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.
 Update Rate
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 con-
figuration 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
 Watchdog Time / Data Hold 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 until 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 WatchdogmTime 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 CPU memory.
The I/O data of all IO Devices can be mapped on to the CPU memory areas. through two Output Areas
and two Input Areas. The Output data can be distributed over two Output Areas, each of which can be
mapped on to CPU memory. Similarly, the Input data can be distributed over two Input Areas, each of
which can be mapped on to CPU memory.
5-3-4 IO Device Area