I/O data
5-13
Countermeasures taken by customer
Parameter access
target ID error
Since the error is
not caused by the
slave unit alone,
the “0x0FFF”
value is stored.
Parameter access has been carried out for an
ID whose address has not been automatically
recognized. Narrow down error IDs by
checking the alarm ID information in the
memory. Then carry out the following:
• Check if the slave unit ID of the parameter
access target in the program matches the ID
of the actual system. Note that the ID of the
input slave unit and the ID of the input/output
mixed slave unit are their addresses +200H.
• When newly creating a system or adding or
eliminating slave units, changing addresses,
perform automatic address recognition
operation.
Then, check that the number of slave units
and addresses match those of the actual
system.
Check for any effects by noise.
The slave unit is notifying error status.
Check the details of the target unit status and
remove obstacles.
The model of a new slave unit subject to the
single unit simplified replacement function is
not matched with that of the former unit.
Connect an appropriate slave unit.
A duplicate address (ID) is set for a
connected slave unit.
After narrowing down error IDs, check the
setting of the slave unit address (ID), and set
the ID so that there will be no duplication.
Occurrence ID is
stored. (255 or
767)
There is a slave unit whose address has not
been set (factory setting). Carry out the
following:
• Set the slave unit address.
• Check that the slave unit address is not set
at 255.
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