How to Assign a MODBUS Address
Parameters • 13
Ust
Maximum number of steps
(
LSt
to 800*10)
Selects the maximum number of steps. At this number of steps, the valve
should be opened completely. Read the datasheet provided by the valve
manufacturer to set this parameter correctly. The maximum number of
steps should be set within the advised range of functioning.
CAUTION! When this parameter is changed, the valve must be re-ini-
tialized. The controller performs this procedure automatically and re-
starts its normal functioning when the programming mode ends.
Sr
Step rate
(10 to 600 step/sec)
Maximum speed to change a step without losing precision
(= losing steps). Set parameter under the maximum speed.
CPP
Current per phase (Only bipolar
valves)
(0 to 100 * 10mA)
Maximum current per phase used to drive valve.
CHd
Holding current per phase
(Only bipolar valves)
(0 to 100 * 10mA)
The current per phase when the valve is stopped for more than 4 minutes.
oPE
Start opening percentage
(0 to 100%)
Opening valve percentage when the start function is active and during
post defrost phase. This phase duration is
SFd
time.
SFd
Start function duration
(0.0 to 42.0 min: tens of seconds)
It sets start function duration and post-defrost duration.
During this
phase, the alarms are neglected.
Sti
Stop regulation interval
(0.0 to 24.0 hours: tens of minutes)
After regulating continuously for
Sti
time, the valve closes for
Std
time
to prevent ice from forming.
Std
Stop duration
(0 to 60 min)
Defines the stop regulation time after
Sti.
During this stop, display shows
StP
message.
MnF
Maximum opening percentage
at normal functioning
(0 to 100%)
During regulation, it sets the maximum valve opening percentage.
FOP
Forced opening percentage
(0 to 100 -
not used; nU
)
If
FOP
=
not used
;
nU
, valve works with regulation algorithm. If
FOP
is different from
not used; nU
,
the valve stays at
FOP
opening percent-
age. This function could be useful during plant starting or during service
operations.
PI PARAMETERS (For use of trained staff only)
Pb
Proportional band
(0.1 to 50.0 / 1 to 90°F)
PI
proportional band. A value
bigger than 5°C is advised.
Code
Description
Function
Table 10-1 - List of Parameters
