Method of operation
2
gas-net
C1 and C2
Page 2-5
The following table shows useful combinations for counters being weighted with
a conversion factor:
Input value
Target
value
Factor for counter
k-ratio
calculation
method
V or Q
V
*Z
k=const or SGERG
E
*Z *Hs
k=const or SGERG
m
*Z *Rho
k=const or SGERG
V or Q
E
*Hs
no correction
m
*Rho no
correction
A counter is considered being disturbed in one of the following cases:
-
The optional related message input
Disturbance information
has been set.
-
The input value for the creation of the counter is disturbed (protocol timeout,
cable break, etc.)
-
A coefficient is disturbed (e.g. the pressure input value of a parameterized
conversion factor)
If the totalizer is transferred digitally, it is possible to either transfer the original
totalizer or to create an own counter. Totalizers/counters being created by the
device itself can be set via the data interface by means of the GW-GNET+ soft-
ware during an online connection. The setting of totalizers is subject to the user
lock (numeric code).
The
Counters
module is able to file up to 100 counters.
2.5.2 Counters - Intercalating Totalizers
If an input totalizer comes in via a digital protocol only at regular intervals, the
option
Intercalate totalizer
is available to achieve that the counter increases
continuously and not suddenly.
Based on the input values the
Intercalate totalizer
functionality creates a count
value, which is updated continuously. This updating is based on the change of
the incoming count value during the previous time interval and can thus not start
unless valid count values permitting a calculation of the average change have
arrived two times in a row.
This calculated average change per time interval is continuously added to the
internally created totalizer. As soon as the next totalizer arrives, the change rate
is calculated anew, thus achieving that the difference in case of deviations be-
tween the created totalizer and the original totalizer is compensated over the
