3-6
Section
Creating and Editing Master Parameters
56
When editing the Master parameters in an existing network configuration file or
an actual Master Unit, specify the Master in the device list window and open the
“Edit Device Parameters” window.
To write Master parameters to an actual Master Unit in the network, specify the
Master in the device list window and open the “Edit Device Parameters” window.
When a Master parameter file has been created offline, open the desired Mas-
ter’s “Edit Device Parameters” window, read the Master file that was created
beforehand, and write it to the device (Master).
When Master parameters have been created online (the Master was specified in
the device list window and the parameters were created), just write the parame-
ters to the device (Master).
Note
1. Master parameters created offline do not correspond to any of the Masters
in the device list as long as the node address remains unset. After saving the
parameters in a Master parameters file, specify the desired Master in the
device list window, and open the “Edit Device Parameters” window. By read-
ing the saved file, the Master parameters can be made to correspond to the
specified Master which has a node address. When you want to write the
parameters to the Master Unit, just select “Write to Device.”
2. It won’t be possible to write the Master parameters file if the PC setting and
Master model in the created Master parameters file do not match the PC set-
ting and Master model in the Master parameters read from the network con-
figuration file or actual Master Unit.
3-6-1 Settings in the Master Parameters
Window
Description
Settings
Master
Master Unit information
Master Unit model and model of the PC to which
the Master is mounted
Register Slave
Registration of the Slaves participating in
remote I/O communications
Node address, vendor, device type, product code,
output size (bytes), and input size (bytes)
I/O Allocation
Allocation of PC
data areas to the
Block allocation
Block number, stating word in each block, and
number of words in each block
registered Slaves
Allocation for each
Slave
Block number, starting word, Low/High byte
specification, and number of bytes occupied
Communication
Cycle Time
The interval between remote I/O
communications with the same Slave
Communication cycle time
Note The I/O allocation settings will be initialized when the Master Unit model or PC
model settings are changed.
3-6-2 Differences between Creating/Editing Master Parameters
This section describes the differences between creating and editing the Master
parameters.
Creating New Parameters
Create the Master parameters by inputting all of the required information
directly, without using a network configuration file or device list from the actual
network. This method can be used when the network configuration has been
decided but the actual network hasn’t been assembled.
The main features of this method are outlined below:
•
The Master parameters can be created even if the actual network doesn’t
exist.
•
The “Create Master Parameters” or “Master Parameter Wizard” command can
be used to create the parameters.
•
If the “Master Parameter Wizard” command is used, I/O can be allocated auto-
matically. I/O words are allocated in node-address order with automatic alloca-
tion, but the allocation can be changed later by editing the Master parameters.
Editing Master
Parameters
Writing Master
Parameters to the Master
Inputting and Registering
All of the Slaves
