Totalization - Siemens Milltronics BW500 Operating Lnstructions

Example:
P014 = 2m/s, design speed
P100 = 3, belt speed
P101 = 100% (2 m/s)
P102 = 20% (0.4 m/s)
P117 = 2% (0.04 m/s)
2 m/s
0.4 m/s
alarm 'on' is with relay de-energized

Totalization

The totalization function is based on the internal rate (mass per unit time) signal
proportional to belt speed and load on the associated belt scale. It is not affected by the
damping function (P080). The rate signal is sampled several times a second to accurately
count the mass of material conveyed. The count is held in the master totalizer used to
increment the internal totalizers and to produce a pulse signal for the remote totalizers.
The BW500 provides several separate totalizer functions:
Internal totalizers
• local display (totalizers 1 and 2)
• verification totalizer (totalizer 3)
• material test totalizer (totalizer 4)
• batch total (totalizer 5)
External totalizers
• totalizer outputs (remote totalizers 1 and 2)
To avoid totalizing material at flow rates below the low flow rate limit, the totalizer drop
out limit (P619) is set to a percentage of the design load. Below this limit, totalization
stops. When material flow returns to a rate above the drop out limit, totalization resumes.
Totalizer resolution or count value is set by the respective internal (P631) and external
1)
(P638) totalizer
1)
If the resolution selected causes the totalizer to lag behind the count rate, the
next possible resolution is automatically entered.
Page 68 Milltronics BW500 and BW500/L - OPERATING INSTRUCTIONS 7ML19985DK05
resolution parameters.
high
100%
low
2 %
20%
actual low
alarm
'off' = 22%
'on' = 20%