Holtgreven GSE-355 I.S. - Manual (Page 86)

77
E
XAMPLE
(I
NDEPENDENT
)
Setup a continuous-cycle static weighing system that fills a weigh hopper from a storage bin. The weigh hopper should
stop the fill at a predetermined target, dump the product into a bag, and then restart the fill. A warning light should
come on to give an operator advance notice to change the bag. The following setup might be used to achieve 1000 lb
dumps:
Parameter Setting Description
P5121.1 ~ Base 1 ~ Net Weigh hopper dump valve based on net weight.
P5122.0 ~ Act 1 ~ HI Hopper dump valve opens when net weight rises above target 1.
P5123.-- ~ Targ 1 ~ 1000 Target 1 value = 1000 kg.
P5124.1 ~ Stbl 1 ~ Inhib Hopper dump valve delayed until scale is stable.
P5125.2 ~ Rset 1 ~ Auto Dump valve auto-closes when net is within +/- 5 grads of zero and stable.
P5127.1 ~ Rstb1 ~ Inhib Dump valve closure delayed until scale is stable.
P5131.1 ~ Base2 ~ Net Weigh hopper fill valve based on net weight.
P5132.1 ~ Act 2 ~ Under Fill valve opens when net weight falls below target 2.
P5133.-- ~ Targ 2 ~ =100 Target 2 value = 100 kg.
P5134.1 ~ Stbl2 ~ =Inhib Fill valve opening delayed until scale is stable.
P5135.4 ~ Rset 2 ~ =Targ Fill valve closes when net weight reaches reset target 2.
P5136.-- ~ Rtrg2 ~ 1000 Reset target 2 = 1000 kg.
P5137.0 ~ Rstb2 ~ Ignore Fill valve closes regardless of stability.
P5141.1 ~ Base 3 ~ Net Alarm light relay based on net weight.
P5142.0 ~ Act 3 ~ Above Alarm relay activates when net weight rises above target 3.
P5143.-- ~ Targ 3 ~ =900 Target 3 = 900 kg.
P5144.0 ~ Stbl3 ~ Ignore Alarm relay activates regardless of scale stability.
P5145.3 ~ Rset 3 ~ Non-L Alarm relay closes when net weight falls below target 3.
P5147.0 ~ Rset3 ~ Ignore Alarm relay closes regardless of scale stability.
Bargraph Setup (LCD)
A bargraph display is available for the ChecP and ChecA setpoint modes of operation. To enable the bargraph, refer to
parameter P5011 (SPbar) in the Parameter Map section beginning on page 52. To weight each segment of the
bargraph refer to parameter P5012 (bArPc) in the Parameter Map section beginning on page53.
S
CALING FOR “ BARS ” ( BARGRAPH ARROWS )
If the first bar turns off at the specified percentage (set at P5012) of the low limit, and the last bar turns off at the low
limit, then the difference will be divided by 8 to determine the number of lbs per bar. At less than 5 grads, the entire
graph is off.
Example#1: “ChecP” (refer to
Figure 33
)
- Lower Limit is set at 50lbs.
- P5012 is set for 80%
- (Bar weight = 50 – 40 = 10 )
(10/8 = 1.25 lbs)
NOTE: Right-side bars will have the same scaling (lb per bar) as the left-side bars. They are represented as a mirror
image of each other.
Bars ON Weight Range (Lower Tolerance Limit)
9 < 40