Endress+Hauser Proline Promass 83 - Examples of Setting Parameters for Batching Processes

10 Block SPECIAL FUNCTION Device Functions Proline Promass 83 MODBUS RS485
140 Endress+Hauser
10.2.3 Examples of setting parameters for batching processes
The two examples in the next section clearly show the effect of different entries and options in the
function group.
Example 1
The first example explains the parameter setting of various functions for carrying out batching and
illustrates how functions are affected when the batching quantity is changed.
The following batching is to take place:
• 2-stage batching with a batching quantity of 10 kg in total.
• Coarse batching quantity of 8 kg. Valve 2 opens at the start of the batching and closes when 8 kg
is achieved.
• Fine batching of 2 kg. Valve 1 opens at the start of the batching and closes (automatically) when
the batching quantity (10 kg) is achieved.
• Once 9 kg have been batched a batching progress message should be generated.
• Value-input should be entered.
CLOSE VALVE 2
MODBUS register:
Data type:
Access:
7223
See Note
Float
read/write
For specifying the quantity value at which contact 2 closes.
This is used as a switch point for valve 2 to output via an assigned output. The
quantity value is entered as a % or as an absolute value, depending on the option
in the function INPUT FORMAT (7209).
Display: Value or 100% (corresponds to the batching quantity)
Factory setting: 0 [unit] or 0 [%]
! Note!
• Dynamic tracking for % data: If the value is entered as a %, this %-value always
refers to the batching quantity (e.g. 70% of a batching quantity of 10 liters =
7 liters). If the BATCH QUANTITY (7203) is adjusted (reduced/increased), the
effective quantity switch point is automatically and dynamically adjusted (e.g.
taking 70% and changing the batching quantity from 10 to 20 liters, the
quantity switch point is adjusted from 7 liters to 14 liters).
• Dynamic tracking for value data: If you enter value-input, this value is
“absolute” for batching quantities that do not change (e.g. always 7 kg for a
batching quantity of 10 kg). If the BATCH QUANTITY(7203) is adjusted
(reduced/increased), the quantity switch point is automatically and
dynamically adjusted/tracked (e.g. with a new batching quantity changing
from 10 to 20 liters, the quantity switch point is adjusted from 7 liters to 14
liters). In other words, the existing value data is tracked as a percentage of the
altered batching quantity.
! Note for MODBUS!
The MOBBUS register depends on the option selected in the function BATCH
SELECTOR (7200):
• BATCH # 1 = MODBUS register 8027
• BATCH # 2 = MODBUS register 8029
• BATCH # 3 = MODBUS register 8031
• BATCH # 4 = MODBUS register 8033
• BATCH # 5 = MODBUS register 8035
• BATCH # 6 = MODBUS register 8037
Function description
SPECIAL FUNCTION → BATCHING FUNCTION → VALVE PARAMETER