Liquid Dosing Control Manual
9.17.150 rev A – September 2020
Page
15
of
34
- Write value <index> to parameter 128 – Counter Unit
(Measurement unit per batch)
- Write value 1 to parameter 126 – Counter Setpoint Mode (Enable new setpoint on limit)
- Write value 0 to parameter 127 – Counter New Setpoint
(Setpoint 0 on batch limit)
When configuring the instrument for batch dosing, always set New setpoint on limit to 0. With
any other value the media flow will not stop after reaching the configured batch size. In that
case, dosing can only be stopped by disabling the counter (Counter Mode = Off) and
changing the main setpoint to 0.”
- Write value <index> to parameter 157 – Reset Counter Enable
(Reset counter)
The following reset methods are supported
Value 1 – Micro-Switch
Value 4 – Parameter 114 – Reset / External Input (pin 5)
Value 7 – Micro-switch / parameter 114 – Reset / External Input (pin 5)
Value 8 – Automatically
Value 16 – Analog Setpoint Input
Note on External Input (pin 5)
External input (pin5) is optional on instruments in the ES-FLOW, ML- and MI-series.
Note on Analog Setpoint Input
When the Analog Setpoint Input will be set to 0, the counter will be reset. When the
setpoint will be set to a value >0, the batch counter will restart the next batch.
For connecting an external device for a Batch Reset signal, refer to the Liquid Flow Controller
hook-up diagram.
Prepare a Batch counter [Batch mode]
Step DDE ProPar Name
Data
type
Execute Value Remark
1
130
104/8
Counter Mode
Uint8
write
2
Counter Mode up to limit (batch
Mode)
2
124
104/3
Counter Limit
Float
write
x.xx
Batch size
3
128
104/2
Counter Unit
Uint8
write
xx
Counter Unit [for example g / kg]
4
126
104/5
Counter setpoint
mode
Uint8
write
1
Enable new setpoint on batch
limit
5
127
104/6
Counter New
setpoint
Uint16
write
0
New setpoint when batch limit is
reached
6
157
104/9
Reset Counter
Enable
Uint8
write
7
Enable reset source [default 7 =
all inputs]
Optimize Full Scale flow for Batch mode
The Liquid Flow Controller needs to be configured for the hourly total flow equivalent.
With a 1 gram dose in 1 second every 10 seconds, the hourly equivalent is 3600 gram.
The total amount of liquid dosed is 360 gram.
For the best performance it's advised to optimize the Full Scale Capacity according to the
maximum flow rate during a batch.This will result in a minimum loss of resolution and highest
possible accuracy.
