M-system 47DAC Operating Manual page 122

Figure 1: P output
■ P OUTPUT ASSIGNED TO H ALARM OUTPUT
(1) The P status in the range between the L and the H setpoints is output using the H alarm output. 'H' indicator does not
turn on.
(2) The H alarm output is not provided when the display value exceeds the H setpoint. However 'H' indicator turns on.
Figure 2: Latching alarm
■ OUTPUT LATCHED / MEASURING CONTINUED
H alarm setpoint
(1)
L alarm setpoint
H alarm output (hi)
(1)
L alarm output (lo)
Power
(1) The L alarm output is provided when the measured
value falls below the L setpoint. The output is held
even when it exceeds the L setpoint. The display
value corresponds to the measured value.
(2) When the power is turned off and restarted, the alarm
output is reset.
(3) The H alarm output is provided when the measured
value exceeds the H setpoint. The output is held
even when it falls below the H setpoint. The display
value corresponds to the measured value.
(4) The L alarm output is provided when the measured
value falls below the L setpoint. The output is held
even when it exceeds the L setpoint. The display
value corresponds to the measured value.
HH alarm setpoint
H alarm setpoint
L alarm setpoint
LL alarm setpoint
HH alarm output (hi)
H alarm output (hi)
L alarm output (lo)
LL alarm output (lo)
'HH' indicator
'H' indicator
'P' indicator
'L' indicator
'LL' indicator
Display value
Measured value
(4)
(3)
(2) (4)
Display value
(1) (2)
(2)
(1)
■ OUTPUT LATCHED / MEASURING STOPPED
H alarm setpoint
(1)
L alarm setpoint
H alarm output (hi)
(1)
L alarm output (lo)
Power
(1) The L alarm output is provided when the measured
value falls below the L setpoint. The output is held
even when it exceeds the L setpoint. The display
value is also held (measurement stopped).
(2) When the power is turned off and restarted, the
alarm output is reset. The display value corre-
sponds to the measured value.
(3) The H alarm output is provided when the measured
value exceeds the H setpoint. The output is held
even when it falls below the H setpoint. The display
value is also held (measurement stopped).
(4) The L alarm output is not provided when the input
falls below the L setpoint.
47DAC OPERATING MANUAL EM-9518-B Rev.4
Display value
Measured value
(4)
(3)
(2)
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