Mitsubishi QJ71C24N User Manual page 337

11 TROUBLESHOOTING
Error code
Error
(Hexa-
decimal)
Protocol
7D10
H
unregistered error
Transmission
7D12 monitoring timeout
H
error
Receive wait
7D13
H
timeout error
CPU response
7D14 monitoring timeout
H
error
CPU response
7D15 monitoring timeout
H
error
Protocol cancel
7D16
H
request error
7D17 Packet size error
H
7D18 Too few digits error
H
11 - 21
Description
• 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.
• Transmission monitoring time has timed
out.
Although the transmission was retried
the specified number of times, it did not
succeed.
• Receive wait time has timed out.
• 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.
• 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.
• 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.
• A packet of more than 2048 bytes was
received.
• 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.
Signal
Corrective action
name
• Check if the specified protocol No. is
correct.
• Check the Protocol registration area
(buffer memory: 4091H to 4098H) to
CHn
see if the specified protocol No. is
ERR.
registered.
• Write the protocol setting data from GX
Configurator-SC, and then execute the
CPRTCL instruction.
• Check if the transmission is interrupted
due to some reason such as DTR
CHn
control.
ERR.
• Check if the CS signal is ON.
• Check the cables for disconnection.
• 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
CHn
function), check if:
ERR.
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.
• Increase the Response monitoring time
(timer 1) value. (Default: 5 seconds)
• If an error has occurred in the CPU,
CHn
refer to the troubleshooting section of
ERR.
the QCPU (Q mode) User's Manual
(Maintenance and Inspection), and take
corrective actions.
• Increase the Response monitoring time
(timer 1) value. (Default: 5 seconds)
•· If an error has occurred in the CPU,
CHn
refer to the troubleshooting section of
ERR.
the QCPU (Q mode) User's Manual
(Maintenance and Inspection), and take
corrective actions.
• 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
CHn
ERR. 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.
• Check the data length of the packet
CHn sent from the device.
• Divide the packet data into several parts
ERR.
and send them separately.
• Correct the data sent from the device.
• If the protocol was edited in GX
CHn Configurator-SC (Pre-defined protocol
ERR.
support function), check the packet
format of the external device to see if
the number of digits is set correctly.
MELSEC-Q
Protocol
Non
Bidire- Pre-
MC Proce-
ctional defined
dure
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