Fema B Series, User Manual, Page: 21 / 36

FEMA ELECTRÓNICA . SERIES B . Models Bxx-RTU
21
1.21.9 Alarms configuration menu for ‘full slave’
Alarm 1
Alarms in
‘full slave’ mode
Alarm 2
Alarm 3
Menu available only in ‘Full slave’ mode. In ‘Full slave’ mode
alarms are remotely controlled from the bus.
By default all alarms are set to ‘remote’ (‘
rMtE’ ) when the
‘full slave’ mode is selected. Select the ‘ Watchdog ’ (‘ W.doG ’)
value to any alarm to activate in case of watchdog error.
For more information see section
1.21.8.
Remote
Watchdog
Remote
Watchdog
Remote
Watchdog
1.21.10 Alarms configuration menu for ‘process slave’
Alarm 1
Setpoint
Hysteresis
Setpoint 2
Active
Type of alarm
Alarms in ‘process
slave’ mode
Activation
delay
Deactivation
delay
Inverted relay
Locked alarm
Maximum
Minimum
Watchdog
Menu available only in ‘Process slave’ mode. In ‘process
slave’ mode, alarms are locally controlled from the instru -
ment. Locally configure the alarm parameters for each alarm.
For more information see section
1.21.8
. At the alarm menu
(‘ ALr1 ’, ‘ ALr2 ’ or ‘ ALr3 ’) configure the following parameters:
• at the ‘ Active ’ (‘ Act ’) parameter select ‘ on ’
• at the ‘
Type of alarm
’ (‘
TypE
’) parameter select ‘
MAX
’ for
maximum alarm (activates when reading is higher than set -
point), or ‘
MIn
’ for minimum alarm (activates when reading
is lower than setpoint), or select watchdog alarm (‘
W.doG
’)
to activate the alarm in case of watchdog error
(see section
1.21.4).
• at the ‘ Setpoint ’ (‘ SEt ’) parameter configure the alarm ac -
tivation point. Parameter value is accessible through ‘fast ac -
cess’
(see section 1.21.11).
• at the ‘ Hysteresis ’ (‘ hySt ’) parameter select the hysteresis
value. Hysteresis applies to the alarm deactivation. Alarm
deactivates once the reading is beyond the setpoint plus the
hysteresis value. Hysteresis prevents relay switching in case
of signal fluctuations close to the setpoint value.
• at the ‘
Activation delay ’ (‘ dEL.0 ’) parameter configure the
delay to apply before the alarm is activated. Delay starts to
count once the setpoint is reached. Value from 0.0 to 99.9
seconds.
• at the ‘ Deactivation delay ’ (‘ dEL.1 ’) parameter configure
the delay to apply before the alarm is deactivated. Delay
starts to count once the setpoint is reached plus the hyster -
esis value. Value from 0.0 to 99.9 seconds.
• to work with ‘windowed alarms’
(see Figure 7)
activate
‘ Setpoint 2 ’ (‘ SEt2 ’) to ‘ on ’ and then configure the desired
second setpoint value. Second setpoint must always be
higher in value than the first setpoint.
• at the ‘
Inverted relay ’ (‘ r.Inv ’) parameter select ‘ on ’ to in -
vert the activation logic of the relay. Relay is inactive when
alarm is active, and relay is active when alarm is inactive.
• at the ‘
Locked alarm ’ (‘ A.Lck ’) parameter select ‘ on ’ to
block the automatic alarm deactivation. Alarm deactivation
must be performed manually, by pressing the ‘LE’ front but -
ton
(see section 1.21.20)
.