Operation; Load Sensing; Speed Sensing; Modes Of Operation - Siemens Milltronics BW100 Instruction Manual

Operation

Load Sensing

In order for the BW100 to calculate rate and hence totalize material flow along the belt
conveyor, a load signal representative of weight of material on the belt is required. The
load signal is provided by the belt scale. The BW100 is compatible with belt scales fitted
with one or two strain gauge type load cells.
Specifications
Refer to
requirements and connection.

Speed Sensing

In order for the BW100 to calculate rate and hence totalize material flow along the belt
conveyor, a speed signal representative of belt speed is required. In constant speed
applications (no speed sensor), the BW100 can be programmed to provide an internal
speed signal. This is achieved by entering the design speed (P014) and providing a jumper
across speed input terminals (TB1-5/6). Speed constant (P015) defaults to 100.
For optimum accuracy of the weighing system, both constant and variable speed
applications, a speed sensor is required. Again, the design speed and speed constants
need to be programmed, however the jumper across the speed input has to be removed
and the speed sensor connected.
Specifications
Refer to
sensor requirements and connection.

Modes of Operation

RUN is the normal or reference mode of operation. It continuously processes the load
signal from the belt scale to produce internal load and rate signals, which are in turn used
as the basis for totalization, mA output and relay control. The RUN display is programmed
(P081) to scroll through rate, totalization, load and speed; either manually by pressing the
ENTER key, or automatically. A bar graph is continuously displayed. It is proportional to
the analog output as programmed (see
From the RUN mode, access to the PROGRAM mode on and zero and span calibration is
made.
The PROGRAM mode allows viewing and, with security permission (P000), changing
parameter values. During PROGRAM, RUN mode functions are still active, i.e.: rate, relay,
analog output and totalization. Error interrupts are suppressed and the bar graph is
disabled.
If the PROGRAM mode is left idle for a period of ten minutes, it automatically reverts to
the RUN mode.
Page 42
Installation/Load Cell
on page 3 and
Installation/Speed Sensor
on page 3 and
Milltronics BW100 - INSTRUCTION MANUAL
on page 6 for belt scale
Analog Output
on page 43).
on page 6 for speed
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