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5 PARAMETER SETTINGS
5
5 PARAMETER SETTINGS
This chapter explains the setting items of the parameters that are required to run the
QJ71DN91.
The following three methods are available to set the parameters.
The parameters set are saved in the flash ROM inside the QJ71DN91 as needed.
Once the parameters are saved in the flash ROM, it is not necessary to save them in
the flash ROM until they are changed.
The parameters can be written to the flash ROM for a maximum of 100,000 times.
• Setting the parameters using the sequence program (see Sections 7.3 and 8.2)
• Setting the parameters using GX Configurator-DN (see Chapter 6)
• Setting the parameters using auto configuration (see Section 5.3)
5.1 Description of Parameter Settings
The following three methods can be used to set the parameters:
• Set the parameters using the TO instruction of the sequence program.
• Set the parameters using GX Configurator-DN.
• Set the parameters using auto configuration.
5.1.1 Parameters for the master function
The following explains the setting items of the parameters for the master function.
(1) Description of the parameter settings using the sequence program
The parameter settings using the sequence program include the following items:
1) Constant scan
2) nth node number (MAC ID)
3) Node number of the nth connection type of the nth slave node
4) Number of byte module points of the nth slave node
5) Number of word module points of the nth slave node
6) Number of double-word module points of the nth slave node
7) Expected packet rate of the nth slave node
8) Watchdog timeout action of the nth slave node
9) Production inhibit time of the nth slave node
The parameters 2) through 9) can be set for a maximum of 63 modules.
When configuring a DeviceNet network that uses a QJ71DN91 as the master
node, it is necessary to set the node number (MAC ID) for the QJ71DN91 and
each of the slave nodes.
The node numbers that can be used are between 0 and 63, and any non-
duplicate node number can be set for the QJ71DN91 and each of the slave
nodes within this node number range.
For the setting method of the node number (MAC ID) of the slave node, refer to
the manual for the slave node.
For the method and details of the parameter settings using the sequence
program, see Section 7.3.1, "Parameter settings using the sequence program",
and Section 3.4.2 (13), "Parameters for the master function".