Error Codes; Communication Error Codes - Mitsubishi QJ71DN91 User Manual

9 TROUBLESHOOTING

9.2 Error Codes

9.2.1 Communication error codes

Error
Error detection
code
The value of the local node number (MAC ID) is
36 QJ71DN91 out of range.
H
The value of the mode switch is out of range.
Two or more nodes that have the same node
39 QJ71DN91
H
number (MAC ID) exist in the network.
E0 QJ71DN91 Network power is not being supplied.
H
E1 QJ71DN91 Other modules are not found in the network.
H
Node number setting switch or mode switch
F0 QJ71DN91
H
setting was changed during operation.
Error
Error detection
code
The number of input points and output points of
02 QJ71DN91
H
the slave node set by parameters are both 0.
The lower byte of the slave node number in the
03 QJ71DN91
H
buffer memory is out of range.
The higher byte of the slave node number in the
04 QJ71DN91
H
buffer memory is out of range.
The connection type in the buffer memory is out
05 QJ71DN91
H
of range.
A slave node having the same node number as
06 QJ71DN91 the node number of the local node is set in the
H
buffer memory.
9 - 6
This section explains the contents of error codes and actions to be taken.
Error codes are classified into the communication error codes and the execution error
codes during message communication.
(1) As for the communication error codes, read them when either the master function
for error set signal (X03) or the slave function for error set signal (X08) is turned
ON, and check the contents of the errors.
(2) As for the message communication execution error codes, read them when the
message communication completion (X02) is turned ON, and check the contents
of the errors.
The error information is stored in buffer memory address 01B1
function is used, and is stored in buffer memory address 0601
function is used. It is separated into the higher byte and lower byte.
Higher byte: Error code
Lower byte: Node number of the node in which an error is detected
Buffer memory
01B1 Higher byte
H
(1) When the error-detected node number (lower byte of error information) is FF
Description
(2) When the error-detected node number (lower byte of error information) is FE
Description
Lower byte
Node number of the node in which an error is detected
Error code
Corrective action
• Set the local node number between 0 and 63.
• Set the mode switch to other than D and E.
• Set non-duplicate node numbers.
• Supply the network power (24V DC).
• Connect other modules in the network.
• Return the node number setting switch or mode
switch setting to the original setting.
Corrective action
• Set the number of input points and output points
according to the slave node specifications.
• Set it between 0 and 63.
• Set it between 01 and 04 , or to 80
H H
• Set it to one of the following:
0001 , 0002 , 0004 or 0008
H H H
• Set non-duplicate node numbers in all nodes.
MELSEC-Q
when the master
H
when the slave
H
Detection time period
Master
function
Detection time period
Master
function
.
H
H
H
Slave
function
H
Slave
function
9 - 6