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21 Annex
21.1.2
Possible faults on digital JUMO ecoLine and tecLine sensors
Fault symptom
A sensor is not detected af-
ter being connected and is
also not visible for manual
linking (cf. Chapter "Sub-
menu for linking", page 99).
see previous page
132
Possible cause
The serial interface of the device
concerned is configured incorrect-
ly.
Two or more sensors of the same
kind were connected.
Several digital JUMO ecoLine or
tecLine were connected to the
same device address, causing
collisions during bus communica-
tion.
More than 6 digital sensors were
connected.
The voltage supply for powering
the sensor electronics is inade-
quate.
Remedy
Check the following serial inter-
face setting:
Protocol
Modbus digital sensors
Baud rate
•
with JUMO ecoLine sensors:
9600
•
only JUMO tecLine sensors
and sensors with JUMO dig-
iLine electronics: 9600, 19200
or 38400
Data format
•
with JUMO ecoLine sensors:
8 - 1 - no parity
•
only JUMO tecLine sensors
and sensors with JUMO dig-
iLine electronics:
8 - 1 - no parity
8 - 1 - odd parity
8 - 1 - even parity:
Follow the instructions in the oper-
ating manual for startup of digital
sensors.
Digital JUMO ecoLine and tecLine
sensors must be put into opera-
tion individually.
⇨
Chapter 7.3 "Digital sensors",
page 70
⇨
Chapter 8.2.7 "Digital sensors",
page 97
Ensure that no more than 6 digital
sensors are connected to a JUMO
AQUIS touch S.
Ensure compliance with the spec-
ifications in the tables for planning
the cabling for digital sensors.
⇨
Chapter 21.2 "Planning the ca-
bling for digital sensors", page
135
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