Mitsubishi QJ71DN91 User Manual page 62

3 SPECIFICATIONS
b15
Flash ROM clear
1: Clear
2: Not cleared
3 - 45
Table 3.28 Contents of communication test result
Error code Contents
Node number
0001
H
duplicate error
0002 Bus off error
H
Network power
0003
H
supply error
0004 Communication
H
0005 error
H
0006 No error
H
(26) Parameter save area selection bit (address 0630
This bit selects which parameter is to be saved when the save parameter to flash
ROM request (Y17) is turned ON from OFF.
To clear the parameters of the flash ROM, set 8000
In this case, the parameters of the buffer memory are not cleared.
The default value varies depending on the operating mode. See Table 3.29.
to
Not used
Table 3.29 Default value of the parameter save area bit
0 to 2 (master function only)
3 to 5 (slave function only)
6 to 8 (master function and slave function)
(27) Auto communication start setting (address 0631
This setting is used to set whether or not the I/O communication automatically
starts when the power is turned ON or at reset by the parameter saved in the flash
ROM.
0: I/O communication does not start automatically (default value).
1: I/O communication starts automatically.
: The I/O communication does not start automatically when any value other than
0 or 1 is set.
Detailed contents
There is another node in the
network which has the same
node number as the local
node.
A bus off occurred during the
test.
The network power supply is
turned OFF.
The data could not be sent or
received correctly.
Communication test was
completed normally.
b3 b2 b1 b0
Parameter for the master
Parameter for the slave
Auto communication start setting
1: Save
2: Not saved
Mode
MELSEC-Q
Handling method
• Assign different node numbers to all nodes in
the network.
• Set the communication speed of all nodes in
the network to the same value.
• Check the overall network conditions, including
if the terminal resistor is disconnected, if the
length of the communication cable is correct,
etc.
• Turn ON the network power supply.
• Connect one or more nodes in the network.
• Set the communication speed of all nodes in
the network to the same value.
• Check the overall network conditions including if
the terminal resistor is disconnected, if the
length of the communication cable is correct.
etc.
—
/1584)
H
.
H
Default value
0005
0006
0007
/1585)
H
H
H
H
3 - 45