Endress+Hauser Proline Promass 83 - Page 142

10 Block SPECIAL FUNCTION Device Functions Proline Promass 83 MODBUS RS485
142 Endress+Hauser
Example 2
The second example explains the parameter settings of the various functions for batching with the
entry format in % for the switch points of the valves.
The following batching is to take place:
• 2-stage batching with a batching quantity of 15 kg in total.
• Coarse batching quantity from 3 to 12 kg. Valve 2 opens when 20% (3 kg)
of the batching quantity is achieved and closes when 80% (12 kg) is achieved.
• Valve 1 opens at the start of the batching and closes (automatically) when the batching quantity
(15 kg) is achieved.
• %-input should be entered.
A0004684
Fig. 38 : Example 2
v = Flow velocity [m/s]
t = Time
V
1
= Valve 1 open
V
2
= Valve 2 open
m = Start batching, valve 1 (7220) opens
n = Valve 2 (7222) opens, coarse batching quantity starts
o = Valve 2 (7223) closes, coarse batching quantity achieved
p= Valve 1 (7221) closes, end of batching
x = After run quantity
The following parameter settings must be made:
– Select the unit for batching:
Function UNIT MASS (0401) Page 15 = kg (kilogram)
– Select the measured variable for batching:
Function ASSIGN BATCH VARIABLE (7202) Page 132 = MASS FLOW
– Enter the batching quantity:
Function BATCH QUANTITY (7203) Page 132 = 15 [kg]
– Select the entry format:
Function BATCH STAGES (7208) Page 136 = 2-stage
– Select the entry format:
Function INPUT FORMAT (7209) Page 137 = %-INPUT
– Percentage data for when the first valve should open:
Function OPEN VALVE 1 (7220) Page 138 = 0 [%]
(Valve 1 closes automatically when the batching quantity is achieved = 15 [kg], display in
function CLOSE VALVE 1 (7221) Page 138)
– Percentage data for when the second valve should open:
Function OPEN VALVE 2 (7222) Page 139 = 20 [%] corresponds to 3 kg
– Percentage data for when the second valve should close:
Function CLOSE VALVE 2 (7223) Page 140 = 80 [%] corresponds to 12 kg
Example 2 a
Batching specifications identical to those in example 1, however the new batching quantity is 45 kg.
The following parameters must be set manually:
Enter the new batching quantity:
Function BATCH QUANTITY (7203) Page 132 = 45 [kg]
The following functions are automatically adjusted to suit the new batching quantity:
– Function OPEN VALVE 1 (7220) Page 138 = 0 [%]
– Function OPEN VALVE 2 (7222) Page 139 = 20 [%] corresponds to 9 kg.
– Function CLOSE VALVE 2 (7223) Page 140 = 80 [%] corresponds to 36 kg.
0
➀
➁
➂
➃
v
t
x
V
V
2
1
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