YSI IQ SensorNet MIQ/A-PR Module - Manual (Page 29)

MIQ/(A-)PR What to do if ...
29 ba76020e01 01/2012
5 What to do if ...
5.1 Fault diagnosis
A simple diagnosis of the operability of the PROFIBUS module and
communication with the PROFIBUS is possible via the LEDs on the
PROFIBUS module in the MIQ/(A-)PR (see section 3.2.4).
5.2 Error elimination
Data transmission
between the Profibus
master and
IQ S ENSOR N ET system is
faulty
The PLC does not
receive any plausible
input data
Cause Remedy
– Incorrect wiring of the
connections on the terminal
strip
– Check/change the connections
(see section 3.2.1)
– Use checklist according to
section 3.5
– Incorrect setting of the
address
– Check/change the setting of
the address (see section 3.2.3)
– Incorrect protocol – Check the version of the GSD
file
– Adapt the protocol
– PROFIBUS module defective – Return the MIQ/(A-)PR to YSI
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