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3. Errors Displayed on the V7 Series 2-33
MONITOUCH Operations
Solution
1. Confirm link unit settings. (After making settings, cut power to the PLC.)
2. Go to the editor (V-SFT) and confirm the settings in the [Comm. Parameter] dialog in
the [System Setting] menu.
3. If errors only occur from time to time, it is possible that there is a noise-based
communication error.
* If you still cannot solve the error even after following the suggestions above, contact your
local distributor.
Error Message Contents Solution
Error code received An error code was sent to the
link unit by the CPU of the PLC.
Examine the CPU error code and solve
the problem.
Break The PLC’s SD (TXD) remains at
the low level.
Examine the connection between the
PLC’s SD (TXD) and the V7’s RD (RXD).
Invalid memory
(applicable to MITSUBISHI CPU)
You specified an address that
exceeds the memory range of
the PLC that you are linked to.
Check the type and range of memory
that you set.
Invalid CPU model
(applicable to MITSUBISHI CPU)
The PLC currently being
supported does not have a
corresponding CPU.
Confirm whether or not the CPU that you
are using can be used with the V Series.
Format The code of the received data is
invalid.
Check 1, 2, 3 described below.
Compare
(applicable to HIDIC S10)
Transmission data and received
data are different.
Check 1, 2, 3 described below.
NAK
(applicable to Allen-Bradley PLC)
A NAK code is received. Check 1, 2, 3 described below.
TNS discrepant
(applicable to Allen-Bradley PLC)
Transmitted TNS data and
received TNS data are not in
agreement.
Check 1, 2, 3 described below.
Communication Error An unclear communication error
is detected.
Check 1, 2, 3 described below.
Count error
(applicable to MITSUBISHI
CPU/Q link unit)
The expected data amount is
different from the count value.
Check 1, 2, 3 described below.
Command error
(applicable to MITSUBISHI
CPU/Q link unit)
The response code differs from
the expected code.
Check 1, 2, 3 described below.
Invalid cassette
(applicable to MITSUBISHI
ACPU)
This cassette is not included in
the memory cassettes currently
being supported.
Contact your local distributor.
Password error
(applicable to MITSUBISHI
QCPU)
The password is incorrect. Contact your local distributor.