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W
F
EIGHING
UNCTIONS AND
means that the speed value output is updated every 2 seconds, the value
will still be defined in LU per second however.
5.5.3
DR 5 – Pulse constant
The pulse constant of the speed sensor indicates the number of pulses per
LU (length unit) of the belt. SIWAREX FTC calculates the current belt
speed on this basis.
5.5.4
DR 5 – Constant belt speed
Constant speed must be defined if no speed sensor is connected. The
calculation of the flow-rate is then performed using this value.
When a speed sensor is connected, the value must be set to 0.
5.5.5
DR 5 – Minimum belt speed
Minimum belt speed is a limit value for minimum belt speed in % of the
nominal speed. The entry of the number e.g. 800 corresponds with 80.0 %.
After this value has been undercut, SIWAREX FTC sets a status bit (see
scale status...).
5.5.6
DR 5 – Maximum belt speed
Maximum belt speed is a limit value for maximum belt speed in % of the
nominal speed. The entry of the number e.g. 1020 corresponds with 102.0
%. After this value has been exceeded, SIWAREX FTC sets a status bit
(see scale status...).
5.5.7
DR 5 – Reaction time for belt monitoring at start
Monitoring the belt speed is only activated after this delay time when the
belt is started.
5.5.8
DR 5 – Reaction time for belt monitoring in operation
When the minimum belt speed is undercut, the message or status bit is
only activated after this delay time has elapsed.
5.5.9
DR 5 – Nominal flow-rate
Nominal flow-rate in WU (weight units) / sec is defined by the user.
It corresponds with the flow-rate that the belt is equipped for.
5.5.10 DR 5 – Effective belt length
Effective belt length in length units LU. The effective belt length
corresponds with half of the distance between the belt rollers which are
found before and after the roller with the belt scale.
5.5.11 DR 5 – Correction factor for belt loading
A material test can be performed to compare the actual required material
quantity with the total calculated by SIWAREX FTC. A correction factor can
be defined for the calculation of the flow-rate quantity for small deviations.
SIWAREX FTC
P
ARAMETERS
5-53
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