Input/output data
5-4
Error code
Name
Error occurrence
ID
Countermeasures taken by customer
DEC
HEX
202
CA
DP, DN
disconnection
error
Error ID is stored. The DP, DN signal lines may be disconnected,
or there may be no response from slave units.
The system configuration may have been
changed after slave unit failure or automatic
address recognition. Narrow down the
disconnected area by using error ID information
or similar method, and then perform the
following:
Check that there are no disconnections in any
transmission line. Also check that a link
connector that is appropriate for the particular
wire diameter is used and it is crimped with the
correct pin assignment.
Check that signal lines are correctly connected
to the terminal block. Also check that there is
no miswiring or insufficient tightening of
screws.
When newly creating a system or altering the
system (adding or eliminating slave units,
changing addresses), please carry out
automatic address recognition. Then, check
that the number of slave units and addresses
are the same as those of the actual system.
If the slave unit
“LINK” LED is not flashing,
check the transmission line for disconnection,
short-circuit, miswiring, or contact failure near
the unit.
300
301
12C
12D
Slave unit
hardware error
Occurrence ID is
stored.
Slave unit hardware malfunction has been
detected.
Turn the power of the slave unit off and on.
Also, check for any problems due to noise.
