Mitsubishi Electric MELSEC iQ-R Series User Manual page 42

Slave Function Parameters
Set the slave function parameter.
Item
Slave Receive Size
Slave Transmit Size
Master/Slave Function Common Parameters
Set the parameter common in the master/slave function.
Item
Auto Communication Start Setting
Data consistency setting
Operation setting when bus off error occurs
Details on the expected packet rate and the production inhibit time
The following table lists the details on the expected packet rate and the production inhibit time.
Connection Type
Polling
2 PARAMETER SETTINGS
40
2.2 Basic Settings
Description
Set the I/O receive data size as the slave function.
(Byte)
Set the I/O transmit data size as the slave function.
(Byte)
Description
Set whether to start the I/O communication
automatically when the CPU module is powered off
and on, or auto configuration is completed.
Sets whether to enable or disable the data
consistency with the data consistency dedicated
instruction or refresh.
"Only master function instruction is enabled", "Only
slave function instruction is enabled", or "Master
function and Slave function instruction are enabled"
is set. In this case, the data consistency can be
maintained by using the data consistency dedicated
instruction when reading/writing the I/O data from/to
the buffer memory of the RJ71DN91.
When "Refresh is enabled" is set, the data
consistency can be maintained when the receive/
transmit data in the buffer memory of the RJ71DN91
is refreshed with to the CPU device.
Set whether to reset the communication chip
automatically to restart the communication when a
bus off error occurs.
EXPECTED PACKET RATE
(1)
The communication watchdog timer value for the
slave is set. When the communication between the
master and slave is cut out for the specified period
(the setting time  4), the slave node will carry out
the action specified with WATCHDOG TIMEOUT
ACTION.
(2)
When the expected packet rate setting value  1,
accordingly, the expected packet rate  0ms,
then, the expected packet rate  the production inhibit time must be observed.
(3)
When 1 is set, accordingly the expected packet rate
is 0ms, the watchdog timer monitor function is
invalid.
Setting range
0 to 128
(Default: 8)
0 to 128
(Default: 8)
Setting range
• Start
• No Start
(Default: Start)
• Disable
• Only master function instruction is enabled
• Only slave function instruction is enabled
• Master function and Slave function instruction are
enabled
• Refresh is enabled
(Default: Disable)
• No reset
• Reset
(Default: No reset)
PRODUCTION INHIBIT TIME
(1)
Minimum transmission cycle of slave = Set the
minimum time in which the slave can prepare the
transmit data.
The master transmits the polling request to the slave
*1
in this time or longer.
(3)
When 1 is set, accordingly the production inhibit time
is 0ms, the master transmits the polling request to the
slave at the scan interval of the module.