Fema I4 Series, Руководство пользователя

Страница: 3 / 24

SERIES I4 · Model I4L
Section INDUSTRIAL . ISOLATED SIGNAL CONVERTERS
www.fema.es 3
The instrument includes a configurable ‘ messages ’ function that provides
advanced information about the system, available to the operator with a
single click at the front key ‘ LE ’ (
3
).
This information is helpful during start-up, installation, system
verification, routine maintenance and troubleshooting, as messages and
values provide information on the actual input and output signal value,
actual percentage of the input signal compared to the full scale, scaled
process values and excitation voltage and excitation current provided to
the load cell.
This information is available at any time, and is displayed sequentially
when requested (except while on ‘ SOS mode ’). Access to this information
reduces maintenance time, improves time invested in failure location,
and helps for an easy resolution of the problem.
Additionally, each instrument can be assigned a custom label code of up
to 8 characters (see 4), that can be displayed at the front display or at the
messages sequence, making system identification of each instrument
an easy task.
To configure the ‘ messages ’ function, see section 13.8.
Table 1 | Available label codes
Letters Numbers
Special
A n 0 -
b o 1 _
c P 2 .
d q 3 º
E r 4 (blank)
F S 5
G t 6
h u 7
I V 8
J W 9
K X
L Y
M Z
6. Messages
Labeling examples: an application measures weight from five different
load cells, at the four corners of a platform and the center. All signals are
converted to 4/20 mA for retransmission to PLC or SCADA. Each I4L can
be configured the following label for easy identification :
• Label for instrument 1: cornEr1
• Label for instrument 2: cornEr2
• Label for instrument 3: cornEr3
• Label for instrument 4: cornEr4
• Label for instrument 5: cEntEr
If this is the first time you are configuring the instrument, below
are the steps to follow during a first installation. Read all the
manual sections in order to have a full and clear view of the
characteristics of the instrument. Do not forget to read the installation
precautions at section 17.
1. Install the instrument at the DIN rail
2. Read how to operate the instrument (see section 12)
3. Read the ‘
practical load cell information ’ (see section 7)
4. Connect the input, the output and the power terminals (see section 9).
• error messages may appear in the process of connection (see
section 16), for example, if ‘ sense ’ is not yet connected, or there is
no current flowing to the cell, because the cell is still not connected.
5. Configure the input and output signals
• choose a predefined configuration code (see section 8)
• introduce the code at the instrument (see section 13.1)
6. If needed, customize the input and output signal ranges (see section 13.4)
• if needed, correct the slope of the load cell using the ‘ field correction ’
functions (see section 13.5) or manually operating the ‘ input signal
low ’ and ‘ input signal high ’ parameters (see section 13.4)
• if needed, apply a ‘ tare ’ to the system (see section 13.4)
7. If needed, configure the display reading (see section 13.6), the key ‘ UP ’
(
5
) ‘ force ’ menu (see section 13.7), and the key ‘ LE ’ (
3
) ‘ messages ’ function
(see section 13.8)
8. If needed, block access to the ‘
configuration menu ’ (see section 13.9)
4. Installation and start-up
The instrument includes a configurable ‘ SOS mode ’ function that provides
a way to manually configure a fixed output signal. This output signal
remains fixed, independent of the input signal value or sensor state.
This function allows to perform urgent maintenance or repair tasks at
the input section of the system, for example replacing damaged sensors,
while the instrument still provides a controlled signal that allows the
process to continue its activity, under human surveillance. When the
maintenance or repair task has been performed, the instrument can be
taken back to the standard working mode, where the output signal is
proportional to the input.
When manually activated, the ‘
SOS mode ’ generates the output signal
configured, and the front display remains flashing with the message
‘ SoS ’. All other systems are disabled, which means that :
• no error messages will be shown on display
• no key ‘
UP ’ (
5
) ‘ fast access ’ menu is accessible
• no key ‘ LE ’ (
3
) ‘ messages ’ function is accessible
• no ‘ Eco ’ mode activates
Only key ‘ SQ ’ (
<
) is accessible, to access the ‘ configuration menu ’
(eventually this access can be password locked) in order to deactivate
the ‘ SOS mode ’. Deactivation of ‘ SOS mode ’ must be performed manually
by configuring the function to ‘ oFF ’.
To configure the ‘ SOS mode ’ function, see section 13.9.
5. SOS mode