Fema B RTU Series, User Manual, Page: 22 / 36

FEMA ELECTRÓNICA . SERIES B . Models Bxx-RTU
22
1.21.11 Fast access
The ‘
fast access
’ is an operator configurable menu. The op -
erator can access this menu with a single press of the front
key ‘UP’ (
5
). The configured menu entries will be accessible.
Eligible parameters to be accessed by this menu are:
• access to the bus activity through the ‘UP’ (
5
) key allows
to see if there is activity at the bus
(see 1.21.12)
.
• access to the maximum and minimum alarms through the
‘UP’ (
5
) key allows to read and reset the values. To reset
the memory values: visualize the value on display, press the
‘UP’ (
5
) key, when the ‘ rSt ’ message appears, press ‘SQ’
(
<
) . The instrument will return to the memory visualiza -
tion. Press the ‘LE’ (
3
) key to exit his menu.
• access to the alarm setpoints through the ‘UP’ (
5
) key al -
lows to read and modify the values. Only in ‘Process slave’
mode.
• access to the address through the ‘UP’ (
5
) key allows to
read the local address of the instrument.
The ‘
fast access
’ menu is not affected by the password func -
tion. This means that the configuration menu can be password
blocked, while some configured functions or parameters can
still be accessible to the operator through the ‘
fast access
’
menu.
• Super fast access
If only a single function is selected for the ‘
fast access
’ menu,
pressing the the ‘UP’ (
5
) key will shortly display the function
name and then automatically jump to the function value.
The ‘ On Power Up ’ (‘ on.Pu ’) functions allows to define a se -
ries of actions to activate when the instrument restarts after
a power loss. Functions available are a delay so the instru -
ment waits a defined time before starting to measure and
control, and the state of the alarms. The functions will apply
only after a restart due to power-loss, they will not apply af -
ter a restart due to changes in configuration.
Delaying the measure and control functions gives additional
time to elements of the system who are slower, so they can
start completely before the instrument begins to acquire sig -
nal and control the outputs.
While on delay mode, the instrument shows all decimal points
lightened and flashing, all alarms are deactivated, and there
is no signal acquisition or communications control. When the
delay time is over, the instrument starts its normal function -
ing.
In ‘Process slave’ mode, the alarms are controlled locally and
the alarm configuration is performed by the operator through
the front keypad. Enable the ‘ Setpoint on bus ’ (‘ StP.b ’) to
‘
on
’ to enable the writing of setpoint alarms though the bus.
By default the value if ‘ oFF ’.
Note : when the ‘setpoint on bus’ parameter is enabled, writ -
ing a value to the register will update the alarm setpoint,
but modifying a setpoint through the front keypad will not
update the register value.
Only available in ‘Process slave’ mode. Set to ‘ Manual ’ to
manually configure the position of the decimal point. By de -
fault, the value is set to ‘ Remote ’ and the decimal point is
controlled through the bus.
‘Bus activity’ function is a detector of electrical activity on
the bus. The function is to help when connecting the instru -
ment to the bus for the first time. It provides information on
wether there is electrical activity on the bus or not.
The ‘Bus activity’ function is visible in the form of a counter
increasing its value on the display. It indicates that the UART
is detecting information bytes on the bus. This detection
means that there are data on the bus, and that it conforms
to the configured speed and data format.
The ‘Bus activity’ is accessible through the key ‘UP’ (
5
)
when configuring the fast access menu
(see section 1.21.11).
1.21.12 ‘Bus activity’ function
1.21.13 ‘On power up’ function
1.21.14 ‘Setpoint on bus’ parameter
1.21.15 ‘Decimal point’ parameter