wtw DIQ/S 182-PR, System Operating Manual

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System 182 PROFIBUS connection
7 - 11 ba75503e07 04/2012
the status of the main measured value, bits 3-0 encode the status of the
secondary measured value.
Other data All other data always consist of only a single byte (Int8).
7.6 PROFIBUS error diagnosis
A simple diagnosis of the PROFIBUS communication is possible via
the measured value and status display (status
online / offline , see
section 4.2).
7.7 PROFIBUS error elimination
Note
Here you will find causes and actions to take of errors concerning the
PROFIBUS communication only. General errors of the IQ S
ENSOR
N
ET
system are dealt with in chapter 9 W
HAT TO DO IF
....
Data transmission
between the Profibus
master and
DIQ/S 182-PR is faulty
The PLC does not
receive any plausible
input data
Cause Remedy
– Incorrect wiring of the
PROFIBUS cable on the
connector
– Check/change the connections
(see section 7.2)
– Use checklist according to
section 7.1
– Incorrect setting of the
address
– Check/change the setting of
the address (see section 7.3)
– Incorrect protocol – Check the version of the GSD
file
– Adapt the protocol
– DIQ/S 182-PR defective – Send DIQ/S 182-PR 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