Omron SYSMAC CJ1W-PRM21, Руководство по эксплуатации

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Configuring the Master
Section 6-4
Through these settings the Master Unit will
• Go to OPERATE mode, i.e. full data exchange with the slave devices,
when switching to RUN / MONITOR mode.
During download of the parameters, the PLC CPU will be switched to
PROGRAM mode and the Unit will be forced to OFFLINE. After resetting
the Unit, and switching the PLC CPU to RUN / MONITOR, the PROFI-
BUS-DP Master Unit will automatically go to OPERATE mode.
• Go to CLEAR mode, i.e. full data exchange with the slave devices, when
switching to PROGRAM mode.
If the PLC CPU is switched to PROGRAM mode, the Master Unit will force
all allocated slave stations to the fail safe state, i.e. it will read all inputs,
but send either 0 data or no data to the slaves.
• Auto-CLEAR mode is OFF.
In case of a failing slave, the Master Unit will continue to exchange I/O
data with the other slaves, while attempting to bring the faulty slave back
to I/O data exchange.
• Auto-Addressing is ON.
With this option ON, mapping of the I/O data is done automatically, i.e. no
gaps are left between consecutive blocks of data. See also section
6-4-3
Defining and Changing I/O Mapping .
Example After making the changes, select the Save button in the lower right corner of
the User Interface to accept the changes. Next select the Bus Parameter tab
to display the Bus Parameters.
6-4-2 Setting the Bus Parameters
The Bus Parameter setup tab contains all the settings required to setup the
communication cycles on the network. The settings depend on the selected
baud rate, the number of slaves, the amount of I/O data per slave, etc.
By default, the Master DTM will calculate the bus parameters, based on this
information.
!Caution
Although the user can decide to modify some of these parameters, it is not
recommended to do that. Making the wrong configuration may lead to unex-
pected behavior.