PL-565 Accumass BW500 Page 93
Operation
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 (P638) totalizer* resolution parameters.
*If the resolution selected causes the totalizer to lag behind the count rate, the next
possible resolution is automatically entered.
e.g.: Internal totalizer 1
given: P005 = 1 (t/h)
P631 = 5
then: totalizer count increments by 10 for each 10 metric tonnes registered
External totalizer 1
given: P005 = 1 (t/h)
P638 = 5
then: contact closure occurs once for every 10 metric tonnes registered
For remote totalization, the contact closure duration (P643) is automatically
calculated upon entry of the design rate (P011) and remote totalizer (P638)
parameters, so that the duration of contact closure allows the relay response to track
the total up to 150% of the design rate. The value can be changed to suit specific
contact closure requirements, such as in the case of programmable logic controllers.
If the duration selected is inappropriate, the next possible duration is automatically
entered.
The totalizers are reset through the master reset (P999), the totalizer reset (P648) or
through the keypad.
• master reset: the reset of all totalizer functions is included in the master reset.
• totalizer reset: totalizer reset can be used to resets internal totalizers 1 and 2, or
totalizer 2 independently. Resetting the internal totalizers 1 and 2
resets the internal registers for external totalizers 1 and 2.
• keypad: pressing
while in the run mode resets internal totalizer 1
Placing the internal totalizers on to the display scroll of the run mode is controlled by
the totalizer display parameter (P647); displaying either one or both totalizers.
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