Delta AH500 - Page 130

AH500 Module Manual
5-8
4. Average
Digital values are averaged. The number by which the sum of several digital values is divided is
between 1 and 100. The sampled values are taken as a queue, and the length of the queue is N.
Each time a new sampled value is put at the end of the queue, an original value at the start of the
queue is removed. The N values are averaged so that the periodic noise is suppressed.
5. Disconnection detection
If a channel is enabled, the module will check whether a sensor is disconnected. If an input circuit
is an open circuit, the module will give an alarm. Please refer to description below for more
information.
6. Channel detection
If an input signal exceeds a range of inputs which can be received by hardware, an error
message appears. Please refer to section 5.2.1 for more information.
a. Giving alarms or warnings
The procedure below explains how to set a module so that it gives an alarm or a warning.
Channel
detection
Enabling
physical range
detection
Yes
Giving alarms
Yes
The BUS FAULT LED
indicator on the CPU
module and the ERROR
LED indicator on the
temperature
measurement module
are ON.
There are error logs in
the CPU module and the
temperature
measurement module.
No (Warning)
No (No detection)
The warning
LED indicators
blink.
Yes
The BUS FAULT LED
indicator on the CPU
module and the
ERROR LED indicator
on the temperature
measurement module
blink.
There are error logs in
the CPU module and
the temperature
measurement module.
No
The BUS FAULT LED
indicator on the CPU
module and the
ERROR LED indicator
on the temperature
measurement module
are not ON.
There are error logs in
the CPU module and
the temperature
measurement module.
There are no error logs
in the CPU module
and the temperature
measurement module.