11 TROUBLESHOOTING
Error code
Error
(Hexa-
decimal)
7164
Request error
H
7166
System error
H
7167
Cannot execute a
H
command during
RUN
7168
H
7169
CPU error
H
716A
H
to
System error
716B
H
716C
System error
H
716D
H
Monitor data write
error
716E
H
716F
Device error
H
7170
H
7171
A compatible 1C
H
frame error
7172
H
Monitor data write
7173
H
error
Protocol No. setting
7D00
H
error
Continuous protocol
7D01
execution count
H
setting error
Protocol not-ready
7D02
H
error
11 - 20
Description
Either the request or the device
designation method is wrong.
The OS of the Q series C24 detected
some error.
A write command was designated when
"Disable write during RUN" was set.
A command that cannot be executed
during RUN was designated.
Cannot communicate normally with the
CPU.
The OS of the Q series C24 detected
some error.
The Q series C24 used is not
compatible with the Built-in Ethernet
port QCPU.
The OS of the Q series C24 detected
some error.
Monitor data was not written using QnA
compatible 2C/3C/4C frame.
Monitor data was not written using A
compatible 1C frame.
A nonexistent device was designated.
Device that cannot be specified by the
corresponding command was
designated.
Number of access points exceeded the
range.
A device that cannot be designated was
designated.
Written number of monitoring points is
incorrect. For example, [0] was
designated.
Monitor data was written for a CPU
other than a Q/QnACPU using QnA
compatible 2C/3C/4C frame.
In control data of the CPRTCL
instruction, the specified protocol No. is
out of range.
The number of protocols to be executed
continuously, which is specified with an
argument in the CPRTCL instruction, is
out of range.
The protocol was executed while Pre-
defined protocol ready (X1D) is OFF.
The CPRTCL instruction was executed
during protocol setting data writing.
The CPRTCL instruction was executed
with abnormal protocol setting data.
Signal
Corrective action
name
Check the transmission
message/request from the external
device, make the necessary
corrections, and send again.
1
Change the setting to "Enable write
C/N
during RUN" and restart data
communications.
Stop the CPU and restart data
C/N
communications.
If there is an error in the CPU, remove
C/N
the CPU error and restart data
communications.
1
To use a Built-in Ethernet port QCPU,
use a Q series C24 of function version
B or later, and the first 5 digits of its
serial No. must be 10042 or greater.
1
PRO
Rewrite monitor data.
PRO
Check and correct the external device
PRO
transmit message and restart data
communications.
PRO
Check and correct the external device
PRO
transmit message and restart data
communications.
PRO
Write the monitor data and use the A
PRO
compatible 1C frame to a CPU other
than a Q/QnACPU.
CHn
Correct the protocol No. setting.
ERR.
Correct the value set for the number of
CHn
ERR.
protocols to be executed continuously.
Confirm Pre-defined protocol ready
(X1D) turned ON before executing the
CPRTCL instruction.
To prevent concurrent execution of the
CPRTCL instruction, set the CPU to
STOP before writing the protocol setting
CHn
ERR.
data.
Write the protocol setting data again to
the Q series C24N, and then execute
the CPRTCL instruction.
If this error persists even after rewriting,
replace the module.
MELSEC-Q
Protocol
Non
Bidire-
Pre-
MC
Proce-
ctional
defined
dure
11 - 20