wtw MIQ/2-PR, Operating Manual, Page: 23 / 28

MIQ/2-PR What to do if ...
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ba75974e01 07/2012
4 What to do if ...
Data transmission
between the Profibus
master and
IQ S
ENSOR
N
ET
is faulty
The PLC does not receive
any plausible input data
Cause Remedy
– Incorrect wiring of the PROFI
-
BUS cable on the connector
– Check/change the connections
(see section 3.3)
– Use checklist according to
section 3.2
– Incorrect setting of the
address
– Check/change the setting of
the address (see section 3.4)
– Incorrect protocol – Check the version of the GSD
file
– Adapt the protocol
– MIQ/2-PR module defective – Return the MIQ/2-PR module
to WTW
Cause Remedy
– Input data and output data
are not consistent
– When programming the PLC,
define input data and output
data as consistent over the
entire data length
– The data interpretation of the
PLC is not correct
– Observe the data alignment of
the PLC data representation. If
necessary, exchange the high-
order and low-order bytes word
by word