á
•
Off: Limit value not active
•
Overflow (+): The limit value message is active when the measured value is
larger than the limit value.
•
Underflow (–): The limit value message is active when the measured value
is smaller than the limit value.
â
Hysteresis
ã
This flag is activated for the measured value (“-” in flag means no flag activa‐
tion) when the measured value is beyond the limit value.
ä
Programmed time limit value for an internal failure of the measuring signal or
the source value for this measured value.
å
Activated flag when the time limit value is overflown.
æ
Start value for using the measured value mask. Is also the output value in the
measured value mask range.
ç
Effective range of the measured value mask. Valid as from the start value; pos‐
itive or negative value possible.
è
Number of decimal places.
5.
Make the desired entries.
6.
Select
Save
.
6.6
Measuring points - automatic
6.6.1
Function of the measuring points automatic
Measuring point switchover
Measuring points are extraction points for sample gas. The “measuring points auto‐
matic” allows the BCU to control automatically up to 8 measuring points.
Hold function for analog outputs
When the measuring point automatic is activated for a measured value, the measured
values of the measuring points (MViMPj) are also provided internally as well as the
measured value (MVi). These measured values of the measuring points can be output
via the analog outputs. During the measuring time of the measuring point (
suring points - automatic", page 52
), the current measured value measured by MAR‐
SIC200 is output as measured value. During the remaining times, the last measured
value measured with this measuring point is output as a constant value.
NOTE
When the measuring point automatic is activated, an identifier of the current measuring
point is shown on the Measuring Screens and on the BCU display.
6.6.2
Criteria for measuring point automatic
•
One digital output exists for each measuring point in the MARSIC200. The digital
output is configured for the measuring point (see “Technical Information BCU”).
•
A device is installed outside the MARSIC200 that switches the sample gas path to
the measuring point (e.g., a solenoid value). The associated digital output controls
this device.
•
At least two measuring points are configured and switched to “active” (
uring measuring point automatic", page 53
).
NOTE
Digital outputs for measuring points automatic are controlled using tag MPiS (see
“Technical Information BCU”).
6
TESTS AND SETTINGS
52
T E C H N I C A L I N F O R M A T I O N | MARSIC200
8017324/15A2/V6-0/2019-10 | SICK
Subject to change without notice
