Omron DRT2 Series Operation Manual page 22

DRT2 Features
Peak/Bottom Hold (Input
Units Only)
Top/Valley Hold (Input
Units Only)
Rate of Change (Input
Units Only)
Comparator (Input Units
Only)
Off-wire Detection (Input
Units Only)
User Adjustment
Cumulative Counter
Communications Error
Output (Output Units
Only)
The maximum (peak) and minimum (bottom) values input to Analog Input Ter-
minals can be held. These values can then be compared with alarm set val-
ues, and flags turned ON as appropriate to indicate the status (comparator
function).
The top and valley values for values input to Analog Input Terminals can be
held. The timing of tops and valleys can be monitored with the Top/Valley
Detection Timing Flags. The top and valley values can be compared with
alarm set values, and flags turned ON as appropriate to indicate the status
(comparator function).
The rate of change for values input to Analog Input Terminals can be obtained
for each sampling cycle.
Values input to Analog Input Terminals or values after math processing can be
compared to the alarm set values (HH, H, L, and LL), and the result indicated
with the Analog Status Flags. If the result is outside the set range, the Normal
Flag (pass signal) is turned ON.
Disconnections can be detected in wiring for analog (voltage or current) inputs
that are enabled as AD conversion points. The status can be checked at the
Master using the Off-wire Detection Flag. This function is valid only for the
input ranges 4 to 20 mA and 1 to 5 V.
Input (or output) can be adjusted to compensate for errors in the input (or out-
put) voltage or current resulting from the characteristics or connection meth-
ods of the input (or output) device. Compensation is performed by applying
linear conversion based on the points corresponding to 0% and 100%.
A cumulated value that approximates the integral of analog input (or output)
values over time can be calculated and read. Monitor values can also be set in
the Unit. When the cumulated count value exceeds the set monitor value, the
Cumulative Counter Flag in the area for Generic Status Flags turns ON.
The values output by Output Units when errors occur can be set for each out-
put.
Section 1-1
5