Vishay G4 User manual

GB
G4 Multi Channel
Weighing Instrument
Program version 1.5.0.0
Scale Batching Program Option
Technical Manual Supplement
PM/DT/HE/RM types

Contents
1. Introduction
General .............................................1-1
Front panel ........................................1-1
2. Batching principles
General .............................................2-1
Digital inputs and outputs..................2-1
Batch start check...............................2-2
Batching activities .............................2-2
Setpoint values..................................2-2
3. Activity description
General .............................................3-1
Weigh In ............................................3-2
Weigh Out .........................................3-6
Pulse Batching ..................................3-6
Dump.................................................3-7
Fill......................................................3-8
Timer and Timer with Output ............3-9
Latch On..........................................3-10
Latch Off..........................................3-10
Manual ............................................3-11
4. Batching parameters
Changing and storing........................4-1
Parameters........................................4-2
5. Operation
General .............................................5-1
PM/DT/HE instrument display...........5-1
RM-instrument display ......................5-4
Batching commands .........................5-5
Batched weights..............................5-10
Printing ............................................5-10
6. Log files
General .............................................6-1
Log file handling ................................6-1
Log file description ............................6-2
7. Batching alarms
G4 Multi Channel Weighing Instrument
General .............................................7-1
Batching alarms ................................7-1
8. Communication
General .............................................8-1
Last activity registers ........................8-1
Last batch registers...........................8-2
Current batching status registers......8-4
Batch data registers ..........................8-5
Manually entered weight registers ....8-6
Batched weight registers ..................8-7
Batching status .................................8-9
Batching step ....................................8-9
Batching alarm ................................8-10
Batching commands .......................8-11
(Parameter list templates)
General Batching Parameters .............1
Appendices
Activity Parameters. ............................. 2

Technical Manual Supplement

G4 Multi Channel Weighing Instrument
1. Introduction
General
In the program version 1.5.0.0 the ‘G4 Modular Weighing Instrument’ includes a
program option for ‘Batching’. The option can be activated by a code specific for each
individual instrument. The code can be ordered from Nobel Weighing Systems and
should be entered in menu ‘Program Options’ in ‘Parameter Set-up’ under the
instrument ‘Main Menu’.
This manual should be used as a supplement to the ‘Technical Manual’ for the
‘G4 Modular Weighing Instrument’. It describes in detail the batching functionality. Note
that this manual can be used for all instrument types (PM, DT, HE and RM) while the
Technical Manuals are different for instruments with graphical display (PM, DT and HE)
and for the alphanumerical display instrument (RM).
When batching with multiple scales, more digital inputs and outputs may be needed.
Connection of external Ethernet WAGO I/O modules will add up to 128 inputs and 128
outputs.
Front panel
Graphical display
The following section applies to the graphical operating display used in the PM, DT and
HE instrument types.
This type of instrument with a graphical display is well suited for use as a complete
multi scale batching system including an easy to use operator interface. Push buttons
on the front panel are used to start, stop, reset etc. It will also display necessary
batching status, alarms etc. The instrument can also be remotely controlled from a
supervising computer (PLC, SCADA system etc).
RM-instrument display
The following section applies to the alphanumerical display used in the RM (DIN rail
mount) instrument type.
The RM instrument is a complete multi scale batcher but it is not intended as an
operator interface for batching. It is possible to set-up the batching sequences
from the RM instrument front panel. However for control (start, stop, reset etc) of
the batching sequence should a supervising computer be used (PLC, SCADA
system etc).
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G4 Multi Channel Weighing Instrument
2. Batching principles
General
Batching with the G4 Instrument means performing up to 12 activities in numerical
order as one sequence for each scale. Batching can be used with each used scale
in the instrument. Each Scale Batching sequence operates independent of the
other. The batching sequence can be repeated a defined number of times. As
batching is performed, the instrument function is supervised and possible alarms
will be given. Printing of alarms and batched weights can be performed on a
connected printer, note that all scales / batching sequences share the same
printer. The batching events can also be written to a log file in the instrument. Each
scale will generate (if configured) it’s own log file.
Digital inputs and outputs
The instrument uses digital outputs and inputs to control and monitor the batching
process. If the number of internal inputs and outputs (inputs and outputs on IO
modules in the instrument) are not sufficient it is possible to use a WAGO-I/O-
SYSTEM 750 to increase the number of inputs and outputs in a batching system.
See the ‘Technical Manual’ and the documentation, covering the WAGO I/O
SYSTEM, supplied by WAGO.
Outputs can be divided in two categories (regarding batching). First there are
indications used by an operator (lamps etc.) or by a supervising computer to
monitor the status of the batching. Secondly there are outputs used to control the
batching process, batching valves, heaters, stirrers etc.
Internal outputs can be used for both categories while external outputs (WAGO-
I/O-SYSTEM) are dedicated as batching process controls.
Inputs can be divided into three categories: First there are control signals used by
an operator (buttons etc) or a supervising computer to control the batching
sequence. These signals are start, stop, restart, reset, reset alarm etc. Secondly
there are acknowledgement signals used as interlocks in the batching process.
Thirdly there are pulse-counting inputs for pulse batching activities where the
number of pulses corresponds to the amount of material batched.
Internal inputs can be used for all three categories while external inputs (WAGO-
I/O-SYSTEM) are dedicated to acknowledgement signals.
Internal inputs and outputs are configured in menu ‘Parameter Set-up / Inputs’ and
‘Parameter Set-up / Outputs’. See the ‘Technical Manual’ chapter ‘Set-up’. Note
that internal inputs and outputs must be set to ‘Batch Activity’ (the default value) to
be used in batching activities.
A digital input may be used in activities belonging to more than one scale (i.e. it is
possible to share inputs between scales).
A digital output may only be used in activities belonging to one scale (i.e. it is not
allowed share outputs between scales).
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Technical Manual Supplement
Batch start check
When batching is started (start button or communication start command) an I/O
usage check is done to verify that all the rules described above are followed. This
check is only done for the scale to start. If there are any violations to the I/O
usage rules there will be an error and the batching sequence will not start. Note
that if any batching is running editing of parameters is not allowed, except for
some activity parameters. It’s therefore recommended that all settings are
properly tested before full production begins.
Batching activities
The following types of activities are available for the batching sequence:
Weigh In used to batch a component into the weighed vessel (batch in).
Weigh Out used to batch from a previously filled, weighed vessel (batch out).
Displayed weight during Weigh Out is always negative.
Dump used to empty a vessel into which components have been
batched.
Fill used to fill up a vessel to a certain level.
Timer used to pause the batching sequence for a defined time.
Timer w. Output used to activate an output for a defined time.
Latch On used to make an output signal.
Latch Off used to break an output signal.
Manual used to halt the batching, making it possible to manually add
special material. Then batching must be manually restarted.
Pulse Batch used for batching with the aid of pulses from a flow meter.
Setpoint values
The activity types Weigh In, Weigh Out, Timer, Timer w. Output, Manual, and
Pulse Batch require Setpoint values. All Setpoint values can be shown and edited in
menu ‘Batch Data’ under the Batching display. Manual editing (from front panel) of
setpoints can only be done on an instrument with graphical display.
Weigh In and The Setpoint value determines the component quantity,
Weigh Out expressed in the measurement unit.
Timer and The Setpoint value determines the duration of the activity,
Timer w. Output expressed in seconds with max. one decimal.
The range is 0.0 to 999999.0 seconds.
Manual The Setpoint value normally determines a small component
quantity to be added manually.
Pulse Batch The Setpoint value determines the component quantity,
expressed in the pulse batching unit.
The activity types Dump, Fill, Latch On and Latch Off do not require Setpoint values.
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G4 Multi Channel Weighing Instrument
3. Activity description
General
In the description of activities below Scale 1 Activity 1 parameters are used as an
example. The parameter names includes the scale number and the activity number.
E.g. ‘1/1:AcivityType’ applies to Scale 1, Activity 1 while ‘3/4:ActivityType’ applies to
Scale 3, Activity 4 etc. Calibration parameters have a prefix that shows which scale the
parameter is belonging to. E.g. ‘1:Capacity’ apply to Scale 1.
Weigh in/out Pulse batch Dump Fill Latch On Latch Off Manual
BATCHING
Select first
activity
Output On Output Off
Check
Acknowledge
Check
Acknowledge
Timer Timer
Check
Acknowledge
Check
Acknowledge
Output On
Output Off
All activities
done?
No
All batches
done?
Yes
No
Yes
Batch end
Gross Net
Timer Timer w. Output
Check
Acknowledge
Check
Acknowledge
Dump Fill
Yes Yes
Check
Acknowledge
No
Check Setpoint
Check
Acknowledge
Auto Tare
Batch. Coarse
Fine+Coarse? No
Manual
Auto TareAuto Tare
Batch. Coarse
Fine+Coarse?
Batch. Fine Batch. Fine
Select next
activity
mode?
No change
Set Gross Mode Set Net Mode
END BATCHING
Principles how batching is carried out. The batching
sequence can include up to twelve activities.
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Technical Manual Supplement
Weigh In
The Weigh In activity is used when the material is batched into the weighed vessel.
Setpoint check
When a Weigh In activity is started, the Setpoint value is checked to determine if the
receiving container has sufficient capacity for the set quantity of material.
The implication of this Setpoint check is that actual Gross weight + Setpoint value must
be less than ‘S1:Capacity’ for the scale.
If the remaining scale capacity is not sufficient the batching sequence will be halted, an
alarm message will be displayed and printed/logged to file. When the alarm cause has
been taken care of the alarm can be reset and the batching restarted.
Acknowledgement check
When the Setpoint value has been checked and accepted, the acknowledgement input
signal is checked according to ‘1/1:Acknowledge Type’ setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the correct
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
Stability Check before batching
If ‘1:Motion Check’ is ‘On’ the instrument waits for the weight to become stable before
Auto taring is performed. Alarm is never initiated by an unstable weight in conjunction
with start of batching. After the instrument is tared it switches to net weight and
displays zero weight.
Batching
Depending on the settings of ‘1/1:Batching Mode’ and ‘1/1:Fine on during Coarse’
parameters there are three different ways that batching can be done.
 ‘1/1:Batching Mode’ is ‘Fine+Coarse’ and ‘1/1:Fine on during Coarse’ is ‘Yes’:
The coarse output and the fine output are activated. The instrument shows
increasing weight. When the weight reaches ‘Coarse Level’ the coarse output
is deactivated (Coarse Level = Setpoint – Fine Value – Inflight Value). When
the increasing weight reaches ‘Inflight Level’ the fine output is deactivated
(Inflight Level = Setpoint – Inflight Value).
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G4 Multi Channel Weighing Instrument
 ‘1/1:Batching Mode’ is ‘Fine+Coarse’ and ‘1/1:Fine on during Coarse’ is ‘No’:
The coarse output is activated. The instrument shows increasing weight. When
the weight reaches ‘Coarse Level’ the coarse output is deactivated and the fine
output is activated (Coarse Level = Setpoint – Fine Value – Inflight Value).
When the increasing weight reaches ‘Inflight Level’ the fine output is
deactivated (Inflight Level = Setpoint – Inflight Value).
 ‘1/1:Batching Mode’ is ‘One Phase’:
The output is activated. The instrument shows increasing weight. When the
increasing weight reaches ‘Inflight Level’ the output is deactivated
(Inflight Level = Setpoint – Inflight Value).
The ‘1/1:Inflight Value’ is adjusted automatically after each batching if the activity
parameter ‘1/1:Inflight Factor’ is set to a value higher than zero.
Waiting after batching
The instrument waits equivalent to ‘1/1:Wait Time’, a time that must be set so that all
material is really stable on the scale before the waiting time has expired.
Batching timeout
The total batching time for the activity is monitored and if the time exceeds the set
‘1/1:Timeout Value’, an alarm will be initiated. Timeout count will start when the
acknowledgement signal is received and stop during possible batching halts.
Timeout count starts all over again when a Timeout alarm has been reset and
batching has been restarted.
No
Coarse On
Fine On
Wait for
Setpoint - Fine value -
Inflight value
Fine on
during coarse?
Yes
BATCHING
COARSE
Coarse Off
END
Flow chart for batching step ”Batching coarse”.
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Technical Manual Supplement
Stability check after batching
After the complete batching of a Weigh In (or Weigh Out) activity and Wait time,
a stability check is performed if ‘1:Motion Check’ is ‘On’ (stability check is never
performed for a Pulse Batching activity).
Unstable weight initiates an alarm. A new weight stability check is performed at
restart, implying that the weight MUST be stable for the instrument to continue the
batching sequence. If stable weight cannot be obtained, batching must be reset or
the ongoing activity skipped.
Tolerance check
The batched weight is always checked against the set tolerance limits. One parameter
defines the ‘1/1:Minus Tolerance’ (weight below the Setpoint value) and the other
defines the ‘1/1:PlusTolerance’ (weight above the Setpoint value). The tolerance setting
range is 0.00 - 100.00 %.
Fine / Output On
Wait for
Setpoint - inflight value
No
Yes
BATCHING
FINE / ONE PHASE
END
Fine / Output Off
Wait during Wait Time
Stable Weight?
Yes
No
Minus
Tolerance
error?
Set Alarm
Restart
Calculate inflight value
Tolerance
error?
No
Yes
Set Alarm
ACCUMULATE WEIGHT
No
Yes
Pulsing time
>0s?
No
Yes
Weight < Setp. -
Inflight value
Calculate inflight value
Fine / Output On
Wait Pulse Time
Fine / Output Off
Flow chart for batching steps ”Batching fine”
and ”Batching one phase”.
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G4 Multi Channel Weighing Instrument
100.00 % means that tolerance check is not performed (all weights are approved).
5.00 % means that the batched weight is permitted to deviate from the Setpoint value
by 5 % thereof.
If the weight is below the ‘1/1:Minus Tolerance’ limit, and a ‘1/1:Pulsing Time’ other
than zero is selected, the fine output will be activated again for the time defined by the
parameter ‘1/1:PulsingTime’. After the ‘1/1:Wait Time’ a renewed tolerance check will
be performed.
If the weight value is still below the ‘1/1:Minus Tolerance’ limit, pulsing of the fine
output will be performed repeatedly until the weight value is above the
‘1/1:Minus Tolerance’ limit. Selection of a ‘1/1:Pulsing Time’ other than zero makes it
possible to ensure that the obtained batch weights will never be below the
‘1/1:Minus Tolerance’ limit.
If ‘1/1:Pulsing Time’ is zero and the weight
value is below the ‘1/1:Minus Tolerance’
limit, batching will recommence in the fine
phase if the remaining weight up to the
Setpoint value is greater than the
‘1/1:Inflight Value’.
In other cases an alarm will be obtained.
An alarm is always obtained if the weight
value exceeds the ‘1/1:Plus Tolerance’
limit.
The operator can bypass these tolerance
alarms by resetting the alarm and restarting
the batching sequence. Either the
erroneous weight can be accepted or other
manual adjustments can be made before
batching is restarted. When restarting after
a tolerance alarm a second tolerance
check will not be performed but the actual
weight will be used for accumulation and
printing.
Maxcorr = Plus tolerance
CALCULATE NEW
INFLIGHT VALUE
END
Maxcorr >
|Weight - Setpoint|
Yes
No
Yes
No
Inflight Factor
> 0 ?
Yes
No
Plus tolerance >
Minus tolerance?
Maxcorr = Minus tolerance
Maxcorr = |Weight - Setpoint|
Corr =
Maxcorr * Inflight Comp Factor
Corr >
10% of
Setpoint
Yes
No
Corr = 10% of Setpoint
Weight >
Setpoint
Yes
No
Inflight Value =
Inflight Value + Corr
Inflight Value =
Inflight Value - Corr
Automatic adjustment of Inflight value.
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Technical Manual Supplement
Automatic inflight compensation
Automatic inflight compensation is operative when the ‘1/1:Inflight Factor’ has a value
higher than zero. It is used to adjust the ‘1/1:Inflight Value’ after each activity to bring
the batched weight value as close to the Setpoint as possible.
Automatic inflight compensation for any activity is performed by:
New Inflight value = preceding Inflight value + (batched weight - Setpoint value) x
‘1/1:Inflight Factor’.
The range of the ‘1/1:Inflight Factor’ is 0 - 100 % (0 % means no compensation).
A 50 % Inflight factor adjusts the ‘1/1:Inflight Value’ by 50 % of the difference between
batched weight and Setpoint value.
The previous figure describes the ‘1/1:Inflight Value’ adjustment. Usually, the difference
between batched weight and Setpoint value is the starting point for the changes.
The difference between batched weight and Setpoint value is limited to the largest
value of:
Setpoint value ‘1/1:Plus Tolerance’ or
Setpoint value ‘1/1:Minus Tolerance’.
This limitation ensures that the correction (for example, by a possible tolerance error)
will not be completely unreasonable. The correction of the ‘1/1:Inflight Value’ is always
limited to 10 % of the Setpoint value.
Note that the inflight value is only calculated once, even in pulsing is made several
times.
Weigh Out
Weigh Out is very similar to Weigh In, but batching is done from an already filled
vessel. The only difference being that the Setpoint value is checked to determine that
a sufficient material quantity is available in the container. The requirement
is for the gross weight to be larger than the Setpoint value + 20 ‘1:Resolution’.
If this requirement is not satisfied an alarm is initiated.
The weight display during this type of batching is always negative.
Pulse Batching
The Pulse Batching activity is very similar to the activities Weigh In and Weigh Out, but
the Pulse Batching activity does not use the measured weight value for the batching.
Instead it counts pulses (normally from a flow meter) that are scaled to a weight,
volume or any other unit. Another difference is that there are no stability and setpoint
checks included in the Pulse Batching sequence.
There are four more parameters in this activity, defining the input for pulses
’1/1:Pulse Input No’, the number of decimals for Pulse Batching ‘1/1:No of Decimals’,
the Pulse Batching unit ‘1/1:Unit’, and the number of pulses/unit ‘1/1:Scale Factor’.
NOTE! For a Pulse Batching activity the weight in this manual should be read as
‘No of counted pulses’ ‘1/1:Scale Factor’.
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G4 Multi Channel Weighing Instrument
Dump
Only emptying of the vessel into which the components have been batched is
performed by this activity.
Acknowledgement check
The acknowledgement input signal is checked according to ‘1/1:Acknowledge Type’
setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
When the acknowledgement signal is correct the instrument switches to display of
gross weight.
Dumping
The dump output, defined in parameter ‘1/1:Output No’, is activated. When the gross
weight has come down to the ‘1/1:Low Level’ a timer is started. This is a low-weight
value, which is used to obtain a detectable weight value close to zero.
After a time equivalent to ‘1/1:Wait Time’, the dump output is deactivated. Wait time
must be selected long enough to allow all material left at the dump low level to leave
the vessel during this time.
Dumping timeout
The total dumping time is monitored and if it exceeds the
set ‘1/1:Timeout Value’, an alarm will be obtained. Timeout
count will start when the acknowledgement signal is
received and stop during possible batching halts.
Timeout count starts all over again if a Timeout alarm has
been reset and dumping has been restarted.
DUMP
END
Set Gross Mode
Dump Output On
Wait for Low Level
Wait during Wait Time
Dump Output Off
Dump activity
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Technical Manual Supplement
Fill
This activity type is used to fill a vessel with material.
Acknowledgement check
The acknowledgement input signal is checked according to ‘1/1:Acknowledge Type’
setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
Filling
If the gross weight is below ‘1/1:Low Level’ the instrument switches to display of gross
weight and activates the Fill output defined in parameter ‘1/1:Output No’, else nothing
more is done in the activity.
When the gross weight has come up to the
‘1/1:High Level’ the output is deactivated.
The instrument waits equivalent to ‘1/1:Wait Time’. It
must be set so that all material is really on the scale No
before the waiting time has expired.
Filling timeout
The total filling time is monitored and if the time
exceeds the set ‘1/1:Timeout Value’ an alarm will be
obtained. Timeout count will start when the
acknowledgement signal is received and stop during
possible batching halts.
Timeout count starts all over again if a Timeout alarm
has been reset and filling has been restarted.
FILL
END
Gross Weight
< Low Level?
Yes
Set Gross Mode
Fill Output On
Wait for High Level
Fill Output Off
Wait during Wait Time
Fill activity
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G4 Multi Channel Weighing Instrument
Timer and Timer with Output
Timer activities are used to switch on an output signal for the set time or to give a
‘pause’ (without any output signal).
Acknowledgement check
The acknowledgement input signal is checked according to ‘1/1:Acknowledge Type’
setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
Timer
When the acknowledgement signal is correct the Timer output (defined in parameter
‘1/1:Output No’) is activated if ‘1/1:Activity Type’ is ‘Timer w. Output’.
The instrument counts down the time corresponding to Setpoint value (the count-down
can be watched on the display). If batching is restarted after a temporary halt (due to,
for example, an alarm) the time count starts from where it was stopped.
When the time has expired the output is deactivated (if it was active).
TIMER
END
Timer Output On
Wait Setpoint Time
Timer Output Off
TIMER
END
Wait Setpoint Time
Timer and Timer with output activities.
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Latch On
Latch On activities are used to switch on an output signal.
Acknowledgement check
The acknowledgement input signal is checked according to ‘1/1:Acknowledge Type’
setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
When the acknowledgement signal is correct the output is activated.
The ‘On During Halt’ parameter determines if the output should be switched off or not
during temporary halts.
Note that latches are turned off automatically when the batching sequence is finished.
This means if the output is supposed to be on for the rest of the current batching
sequence it is not necessary to use an Latch Off activity to turn it off.
Latch Off
Latch Off activities are used to switch off an output signal.
Acknowledgement check
The acknowledgement input signal is checked according to ‘1/1:Acknowledge Type’
setting’:
 ‘No Test’: No acknowledgement checking is done. The batching sequence
continues immediately.
 ‘At Start’ or ‘Continuous’: An unsatisfactory signal will initiate an alarm and the
batching sequence is halted. The alarm should be reset and the sequence
restarted to continue the batching sequence. The acknowledgement input
signal will then be checked again.
 ‘Wait’ or ‘Wait+Cont.’: The instrument will wait (without alarm) until the
acknowledgement input signal is received. When the acknowledgement signal
is correct the batching sequence continues.
When the acknowledgement signal is correct the output is deactivated.
Note that latches are turned off automatically when the batching sequence is finished.
This means if the output is supposed to be on for the rest of the current batching
sequence it is not necessary to use an Latch Off activity to turn it off.
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G4 Multi Channel Weighing Instrument
Manual
A Manual activity halts the batching to allow special operations that must be carried out
manually. (For example, to add small quantities of material manually.) Before batching is
halted autotaring is performed, which means that the net weight zero is displayed when
the manual operation starts.
Batching must be restarted either by giving a Restart Command (communication or
digital input) or manually by pressing the START button (only on PM/DT/HE instrument).
If ‘1/1:Print Weight’ is ‘Yes’ then the weight value (weighed by the scale or entered
manually) will be added to the accumulating registers and printed. Parameter
‘1/1:Enter Weight’ defines whether the operator shall have the opportunity to enter the
weight value for the added material manually, or not. If parameter ‘1/1:Enter Weight’ is
‘Yes’ but the operator does not enter a weight value manually, then the weight value
from the scale will be used. A “manual entered weight” sent by communication is used
in the same way as if the operator enter a value from the front panel.
MANUAL
END
Print Weight?
Yes
No
Accumulate Weight
Halt Batching
Stable Weight?
No
Yes
Wait for Command Restart
(Manual operation is
performed)
Alarm
Restart
Flow chart for activity Manual.
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