Version no. Description
1.0.6.0 The analogue output for control of the HLI expansion valve has been moved
from analogue output channel AO3 to channel AO1. It is now possible to con-
figure both Rotatune (VSD) and HLI 4-20mA oil cooling.
A new function makes it possible to make the compressor capacity (Yield) sig-
nal available as an analogue output on channel AO1.
A new Rota function for reciprocating compressors with VSD has been added.
With this function all part loads are run at minimum speed.
The max discharge pressure limits for HPO compressors have been increased
to make it possible to operate up to 42 Bar as specified.
For two steps reciprocating TSMC/TCMO compressors the limiting function for
Process out high/low process out were not active. This has now been correc-
ted.
SAB 120 with oil pump started the oil pump if the compressor stopped at a ca-
pacity > 5%. The oil pump should not be started and this has been corrected.
For screw compressors, the default settings have been changed for oil temper-
ature limits and discharge gas superheat limits.
A sequence control problem observed on plants with three Rota compressors
running under Multisab has been solved. Due to that problem the third com-
pressor in sequence would sometimes fail to start when it was needed. The
start timer was activated but stopped shortly after.
Capacity control through Profibus would not re-establish default Multisab se-
quence operation when control was switched back from Capacity control to
e.g. Suction pressure control. This could be seen by the fact that the start
number did not automatically switch from 0 to the original start number. This
has now been corrected.
It was not possible to change the following Danbuss parameters; M0102,
M0103, M0104 and M0105. This has been corrected.
If continuously writing values to Unisab III via Modbus TCP from a PLC, Unisab
III would be overloaded by saving data even though the data were not
changed. It used all available resources which could make Unisab fail. This has
now been corrected.
The HMI reaction time has been improved - the key response time is now fast-
er.
The update of all dynamic pictures has been improved - the drawing of the
pictures has been made faster thus improving the HMI.
In some pictures, the
F2
and
F3
keys are now used as PgUp and PgDn func-
tions. They work in most pictures with a scroll bar on the right side i.e. when
there are more lines that can be displayed at a time.
Troubleshooting
298/319
Engineering manual - Unisab III 1.10
001930 en 2014.09
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