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
7D10H
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.
7D12H
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.
7D13H
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.
7D14H
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.
7D15H
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.
7D16H
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.
7D17H 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.
7D18H 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.
To Next Page
Loading...
