BEKA BA578C, Руководство пользователя, Страница: 21 / 25

Fig 10 Typical application of alarms
10.1.2 Programming & adjustment
When an alarm card is added to a BA578C
transmitter the main programme menu is extended
as shown in Fig 11. The additional functions
'ALr1', 'ALr2' and 'AcSP' appear between 'Cond'
and 'COde' in the programme menu. For simplicity
Fig 13 only shows the functions available on alarm
1, but alarm 2 has identical facilities.
The alarms relate to the digital display and the
setpoints are shown in the same units as the
display.
The following table summarises each of the alarm
programme functions and includes a cross
reference to more detailed information. Again only
the functions on alarm 1 are listed, but alarm 2 has
identical facilities.
10.2 Summary of programmable
functions.
Display Summary of function
'EnbL' Alarm enable
Enables or disables the alarm function
without changing the alarm parameters.
See section 10.3.1
'SP1' Alarm setpoint 1
Adjusts the alarm setpoint. The alarm
is activated when the indicator display
equals the setpoint.
The setpoint can also be adjusted
directly from the operating mode.
See section 10.3.2
'HI.LO' Alarm function
Defines whether the alarm has a high or
low function
See section 10.3.3
'no.nc' Normally open or normally closed
output
Determines whether the single pole
alarm output is open or closed in the
alarm condition.
See section 10.3.4
'HStr' Hysteresis
Adjusts the alarm hysteresis.
See section 10.3.5
'dELA' Alarm delay time
Adjusts the delay between the display
equalling the setpoint and the alarm
output being activated.
See section 10.3.6
'SIL' Alarm silence time
Defines the time that the alarm output
remains in the non-alarm condition
following acceptance of an alarm.
See section 10.3.7
'AcSP' Access setpoint
Sub-menu which enables the function
allowing direct access to the alarm
setpoints from the transmitter display
mode, and defines a separate security
code.
See section 10.3.8
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