Specifications

Command Set 4-10
Enable Alarms (EA)
Digital outputs DO0/LO and DO1/HI serve a dual purpose as both digital
outputs and alarms. Digital output 0 is shared with the LO alarm and digital
output 1 is shared with the HI alarm. The Enable Alarms (EA) command
configures the shared outputs to indicate alarm conditions and disconnects
digital outputs 0 and 1. The EA command only affects the electrical output
of the alarms to the pins. The alarm status can be read at any time with the
Digital Input (DI) command. The complement to the EA command is the
Disable Alarms (DA) command.
Command: $1EA
Response: *
Command: #1EA
Response: *1EAE1
Events Read & Clear (EC)
The EC command is used to read the value of the Events Counter and
automatically clears the count to zero:
Command: $1EC
Response: *0000123
Command: #1EC
Response: *1EC000012339
The EC command eliminates a problem that may occur with a Read Events
(RE) and Clear Events (CE) command sequence. Any counts that may
occur between the RE-CE sequence will be lost. The EC command
guarantees that the counter is read and cleared without missing any counts.
High Alarm Limit (HI)
The high alarm command sets the value and type of the high alarm. The data
specified by the HI command is stored in nonvolatile memory and compared
with the sensor data after every A/D conversion. The high alarm is activated
if the input data is greater than the value stored by the HI command. The high
alarm status may be read using the Digital Input (DI) command. The alarm
may be used to activate a digital output by using the Enable Alarms (EA)
command. The HI command also specifies whether the high alarm is
momentary or latching. A letter indicating the alarm type, “L” for latching or
“M” for momentary, must follow the alarm value. For example:
Command: $1HI+00100.00M
Response: *
Command: #1HI+00100.00M
Response: *1HI+00100.00ME3