5 what to do if, 1 fault diagnosis, 2 error elimination – YSI IQ SensorNet MIQ/A-MOD Module User Manual
Page 35: What to do if, Fault diagnosis, Error elimination, Chapter 5 w, S (see chapter 5 w, 5what to do if
MIQ/(A-)MOD
What to do if ...
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What to do if ...
5.1
Fault diagnosis
A simple diagnosis of the operability of the Modbus module and
communication with the Modbus is possible via the LEDs on the
Modbus module in the MIQ/MC (-A)-MOD (see section 3.2.4).
5.2
Error elimination
Data transmission
between the Modbus
master and
IQ S
ENSOR
N
ET
system is
faulty
The Modbus master
does not receive any
plausible input data
Cause
Remedy
– Incorrect wiring of the
connections on the terminal
strip
– Check/change the connections
on the terminal strip (see
section 3.2.1)
– Incorrect setting of address,
baud rate, parity
– Check/change the settings
– Incorrect protocol
– Adapt the protocol
– Modbus module defective
– Send MIQ/MC(-A)-MOD
module to YSI
Cause
Remedy
– The data interpretation is not
correct
– Observe data formats of the
MIQ/MC(-A)-MOD (see also
section 4.5).