8.13.1 Specification of tare weight
You can enter a tare weight. If a tare weight is to be applied, it must be enabled with the
corresponding command. The tare weight must not exceed the maximum tare load specified in
data record DR 3.
8.14 DR 30 current process values
Current states and process values in the scales can be monitored using process values and
advanced process values from data record DR 31. Monitoring selected data during
commissioning is extremely useful as it helps you to optimize parameters.
Procedure
● Read data record DR 30 cyclically or on a time-triggered basis
● Display/analyze the required tags
It is not always necessary to cyclically read data record DR 30. If the relevant process tags have
already been selected in data record DR 14 (→ DR 14 SIMATIC interface parameters
(Page 81) ), they are immediately transferred via the I/O interface. In this case, these tags and
all status bits and messages are accessible without data record communication.
Table 8-11 Assignment of data record 30
Variable Note Type L Rw Default Min. Max.
Data record
number
Contains no. of data record UINT 2 r 30 - -
Length Data record length information UINT 2 r 44 - -
Application Information on which applica‐
tion the data record belongs to
UINT 2 r 201 - -
Version identi‐
fier
Information on the current da‐
ta record version
UINT 2 r 1 1 255
1/4d zero Set if gross is less than ± 0.25e BIT 2 r 0 - -
9e max Set if the weight has exceeded
the gross weighing range by
more than 9 display steps (d)
BIT 0 r 0 - -
Tared Set if tare memory is not equal
to zero
BIT 0 r 0 - -
Manual tare
set (pT)
Set if the tare memory is as‐
signed an external specified
value
BIT 0 r 0 - -
Reserve BIT 0 r 0 - -
Waiting for
standstill
Set if module is waiting for
standstill to execute command
BIT 0 r 0 - -
Standstill Set if standstill condition is met BIT 0 r 0 - -
Reserve BIT 0 r 0 - -
Empty Set if "Empty" condition is met BIT 0 r 0 - -
Limit value 1 Limit value 1 has responded BIT 0 r 0 - -
Scale parameters and functions
8.14 DR 30 current process values
SIWAREX WP321
84 Operating Instructions, 08/2019, A5E33715669A-AD
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