Latch alarms – Rockwell Automation 1734-XXXX POINT I/O Digital and Analog Modules and POINTBlock I/O Modules User Manual
Page 103
Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
POINT I/O Module Data 105
•
Calibration Mode Bit - This bit (Channel Status Bit 1) is set when you
begin calibration. See the Calibrate Your Analog Modules chapter of this
manual for calibration details. When set, the channel status indicator
blinks green.
•
Low Alarm Value Bit - When the input signal is less than the Low Alarm
value, this bit (Channel Status Bit 2) is set. The default value for this alarm
is as follows:
•
1734-IE2C module is 3113 counts (3.8 mA)
•
1734-IE2V module is 500 counts = 500 mV (0.5V).
•
High Alarm Value Bit - When the input signal is more than the High High
Alarm value, this bit (Channel Status Bit 3) is set. The default value for
this alarm is as follows:
•
1734-IE2C module is 16547 counts (20.2 mA).
•
1734-IE2V module is 9500 counts = 9500 mV (9.5V).
•
Low Low Alarm Value Bit - When the input signal is less than the Low
Low Alarm value, this bit (Channel Status Bit 4) is set. The default value
for this alarm is as follows:
•
1734-IE2C module is 2867 counts (3.5 mA).
•
1734-IE2V module is 200 counts = 200 mV (0.2V).
•
High High Alarm Value Bit - When the input signal is more than the High
Alarm value, this bit (Channel Status Bit 5) is set. The default value for
this alarm is as follows:
•
1734-IE2C module is 16792 counts (20.5 mA).
•
1734-IE2V module is 9800 counts = 9800 mV (9.8V).
•
Under-range Status Bit - This bit (Channel Status Bit 6) is set when the
module returned data is at a minimum. 1734-IE2C module is 98 counts
(around 120
μ
A); 1734-IE2V module is -0.25 or -10.25V, depending on
range. When set, the channel status indicator blinks red.
•
Over-range Status Bit - This bit (Channel Status Bit 7) is set when the
module returned data is at a maximum. 1734-IE2C module is around 21
mA. 1734-IE2V module is +10.25V. When set, the channel status
indicator blinks red.
Latch Alarms
The latch alarms lets low- and high-alarm status information to be latched when
an alarm is set. Even if an alarm is momentarily set, the status bit stays set until a
reset latch service is issued. Default setting is Unlatched. Each channel can be
configured individually.