NOVUS FieldLogger Register - Manual (Page 3)

FieldLogger Register
NOVUS AUTOMATION 3/8
ACQUISITIONS SCREEN
Parameters related to how and when readings take place are defined
in this screen. Acquisition is the operation of reading and registering
in local memory the process variables (temperature, pressure etc)
present in the input channels enabled. Among parameters are
acquisitions start and end of readings and time interval between
acquisitions.
In models without local memory, aimed only at measuring and
making them available in the supervisory software, this screen will
not be enabled.
The acquisition screen parameters are:
Acquisitions start – There are 3 options to start acquisitions in the
logger:
1 Specific date and time. Day, month, year, hour, minutes and
seconds are defined. When they are reached they start reading
signals from the input channels of the logger.
2 Digital input (DI) activation. In this mode, acquisitions start
whenever the DI is triggered and stop when it is disabled.
3 Through Start button – Determines that acquisitions start
when the Start button is pushed from the screen. In this option,
observe that settings must be already configured and applied to
the logger.
Base Interval Between Loggings – Defines the minimum time
interval between acquisitions. It can be from hours up to tenths of
seconds and it is common to all channels. However, a multiplier of
the base interval can be defined for each active channel.
Interval multiplier – Readings can be taken in different times for
each channel, a base interval multiplier is defined for each channel.
The multiplier can be defined between 1 and 255.
Example: For a base interval of 10s, the logger will record at every
10s the value measured in channels programmed with multiplier
equals 1. At every 20s in channels with multiplier equals 2,…
Acquisition end – Defines the acquisitions end. Options are:
1 Specific date and time. Day, month, year, hour, minutes and
seconds are defined. When they are reached they stop acquiring
values from the input channels of the logger.
Note: Acquisitions can be stopped before the preset period is
reached by pressing the Stop Now button or when the full
memory capacity is reached.
2 Stop after a defined number of base intervals is reached.
Note: Acquisitions can be stopped before the expected
acquisitions number is reached by pressing the Stop Now button
or when the full memory capacity is reached.
3 Never stop (wrap around). Acquisitions are taken
continuously. When the full memory capacity is reached, older
information are replaced by new ones. The process is only
interrupted if the Stop Now button is pressed.
4 Full memory. Acquisitions end when the full memory
capacity is reached. Pressing the Stop Now button also ends
acquisitions.
The Acquisitions screen has also an important group of information
about the logger and acquisitions:
Current Time: Displays current date and time used by the
computer.
Logger Time: Displays current date and time used by the
logger.
Logging Available Memory: Displays the total memory capacity
for the logger.
Programmed Number of Acquisitions: Indicates the number of
acquisitions that will be performed and logged in memory. It is
also possible to check the number of acquisitions per channel
enabled.
Programmed Number of Base Intervals: Informs the minimum
interval between programmed acquisitions.
Estimated time: Informs time required to complete the
programmed acquisitions.
After setting up the logger and estimating possible implications, the
user must send the configuration to the logger. Press Apply.
To send and leave the configurator software, press OK. To leave the
configuration without sending to the logger, press Cancel.
Note: When the new configuration is sent, the logger time is updated,
adopting the computer time (date and hour).
Figure 3 – Acquisitions screen
COMMUNICATION SCREEN
This screen is showed even when there is no communication
between logger and computer. It provides parameters related to
system communication. Its fields are:
Host Parameters (HP) – Provides a choice for the serial
communication port to be used.
Network Operation – Makes possible to define a new
communication address and baud rate for the logger. Define
values and press Change. If connected, it makes possible to
read the complete configuration of a given logger. It is only
necessary to select the required address and press Read
Configurations. The configurator starts to display the selected
logger configuration on the screen.
Parity – Makes possible to define parity used in serial
communication. The number of Stop Bits as recommended by
the Modbus standard depends on parity. When parity is
configured as none, 2 stop bits are used; when parity is
configured as Odd or Even, 1 stop bit is used.
Note: Baud rate and parity must be the same for all the network
elements.
Automatic Search – Makes possible to search the connected
logger communication parameters, in a point-to-point
communication, testing all possibilities of addresses and possible
transmission rates (baud rate). After the parameters are found,
they are displayed.
Figure 4 – Communication screen