ADAM-5000 System output of a channel of an analog input module. The relationship
and their High/Low alarm limits may be downloaded into the
system‘s EEPROM by the host computer.
The alarm functions can be enabled or disabled remotely. When the
alarm function is enabled, the user may select whether the digital
output is triggered. If the digital outputs are enabled, they are used
to indicate the High and Low Alarm state. The High and Low alarm
states can be read at any time by the host computer.
Every A/D conversion will be followed by a comparison with the High
and Low limit. When the input value is over the High limit or below
the Low limit, the High or Low alarm state is set to ON.
There are two alarm mode options: Momentary and Latching.
If the alarm is in Latching mode, the alarm will stay on even when the
input value returns within limits. An alarm in Latching mode can be
turned OFF by issuing a Clear Alarm command from the host computer.
A Latching alarm is cleared by the microprocessor when the opposite
alarm is set
For example, the alarm is in latching mode and the High alarm is turned
ON. When the module receives a value that is lower than the Low
alarm limit, the microprocessor will clear the High alarm and turn the
Low alarm ON.
When the alarm is in Momentary mode, the alarm will be turned ON
when the input value is outside of alarm limits and OFF while the input
value remains within alarm limits. The arrangement of coupling High
and Low alarm states with digital outputs may be utilized to build ON/
OFF controllers that can operate without host computer involvement.
Connectivity and Programming
ADAM-5000 systems can connect to and communicate with all
computers and terminals. They use either RS-232 or RS-485 transmis-
sion standards and communicate with ASCII format commands.
However, users can only select and use one communication port at
any time. All communications to and from the system are performed in
ASCII, which means that ADAM-5000 systems can be
3-4 ADAM-5000