YSI DIQ/S 182-MOD System 182 - Manual (Page 126)

Modbus connection System 182
7 - 14 ba76025e01 02/2012
7.6 Modbus error elimination
Note
Here you will find causes and actions to take of errors concerning the
Modbus 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 Modbus
master and
DIQ/S 182-MOD is faulty
The PLC does not
receive any plausible
input data
Cause Remedy
– Incorrect wiring of the
Modbus cable on the
connector
– Check/change the connections
(see section 7.2)
– Use checklist according to
section 7.1
– Incorrect setting of address,
baud rate, parity
– Check/change the settings
(see section 7.3)
– Incorrect protocol – Adapt the protocol
– DIQ/S 182-MOD defective – Send DIQ/S 182-MOD to YSI
Cause Remedy
– The data interpretation is not
correct
– Observe data formats of the
DIQ/S 182-MOD (see also
section 7.4.4).