Mitsubishi MELSEC QJ71C24, User Manual

Page: 337 / 442

11 - 21 11 - 21
MELSEC-Q
11 TROUBLESHOOTING
Protocol
Error code
(Hexa-
decimal)
Error
Description
Signal
name
Corrective action
MC
Non
Proce-
dure
Bidire-
ctional Pre-
defined
7D10
H
Protocol
unregistered error
•
The protocol No. specified in control
data for the CPRTCL instruction is not
registered to the Q series C24N.
•
The CPRTCL instruction was executed
with no protocol setting data written.
CHn
ERR.
•
Check if the specified protocol No. is
correct.
•
Check the Protocol registration area
(buffer memory: 4091H to 4098H) to
see if the specified protocol No. is
registered.
•
Write the protocol setting data from GX
Configurator-SC, and then execute the
CPRTCL instruction.
7D12
H
Transmission
monitoring timeout
error
•
Transmission monitoring time has timed
out.
Although the transmission was retried
the specified number of times, it did not
succeed.
CHn
ERR.
•
Check if the transmission is interrupted
due to some reason such as DTR
control.
•
Check if the CS signal is ON.
•
Check the cables for disconnection.
7D13
H
Receive wait
timeout error
•
Receive wait time has timed out.
CHn
ERR.
•
Check if the reception is interrupted due
to some reason such as DTR control.
•
Check the cables for disconnection.
•
Check the sending device for an error.
•
Using the circuit trace function
(communication data monitoring
function), check if:
1) Transmissions from external devices
are interrupted.
2) Any data are missing due to a
receive error.
3) An error exists in the data (packet)
sent from the other device.
7D14
H
CPU response
monitoring timeout
error
•
CPU response monitoring time has
timed out during transmission.
Data to be sent to the device could not
be acquired from the CPU within the set
time.
CHn
ERR.
•
Increase the Response monitoring time
(timer 1) value. (Default: 5 seconds)
•
If an error has occurred in the CPU,
refer to the troubleshooting section of
the QCPU (Q mode) User’s Manual
(Maintenance and Inspection), and take
corrective actions.
7D15
H
CPU response
monitoring timeout
error
•
CPU response monitoring time has
timed out during reception.
Data received from the device could not
be stored into the CPU within the set
time.
CHn
ERR.
•
Increase the Response monitoring time
(timer 1) value. (Default: 5 seconds)
•
· If an error has occurred in the CPU,
refer to the troubleshooting section of
the QCPU (Q mode) User’s Manual
(Maintenance and Inspection), and take
corrective actions.
7D16
H
Protocol cancel
request error
•
A cancel request was accepted during
protocol execution, and the CPRTCL
instruction failed.
•
The CPRTCL instruction failed because
protocol setting data were written during
CPRTCL instruction execution.
CHn
ERR.
•
Check the cancelled protocol in the
CPRTCL instruction’s control data
(execution count result), and eliminate
the cause of the cancellation.
•
If necessary, clear the error information
by error clear request (YE/YF).
•
To prevent concurrent execution of the
CPRTCL instruction, set the CPU to
STOP before writing the protocol setting
data.
7D17
H
Packet size error
•
A packet of more than 2048 bytes was
received.
CHn
ERR.
•
Check the data length of the packet
sent from the device.
•
Divide the packet data into several parts
and send them separately.
7D18
H
Too few digits error
•
When data are received by the protocol
including a packet that contains a
conversion variable (variable number of
data), the number of digits
corresponding to the variable is
insufficient.
CHn
ERR.
•
Correct the data sent from the device.
•
If the protocol was edited in GX
Configurator-SC (Pre-defined protocol
support function), check the packet
format of the external device to see if
the number of digits is set correctly.