Omron SmartSlice GRT1 Series Operation Manual page 23

Features of the GRT1-series Slice I/O Units
Total ON Time Monitor
Operation Time Monitor
1-2-3 Analog Unit Features
Setting the Number of AD
Conversion Points
Moving Average
Scaling
Peak/Bottom Hold
Top/Valley Hold (Input
Units Only)
Rate of Change
Comparator
Off-wire Detection
User Adjustment
4
Note The Contact Operation Counter and Total ON Time Monitor cannot be used at
the same time for a single contact.
This function can record the total ON time of devices connected to the Unit,
such as sensors and relays. The total time is stored in the Unit and can be
read by the Configurator or explicit messages. A warning set value can be set
in the Unit to monitor the total ON time, and turn ON a warning flag in the Sta-
tus Area when the set value is reached.
Note The Total ON Time Monitor and Contact Operation Counter cannot be used at
the same time for a single contact.
This function can measure and monitor an Input Unit's operating time. The
time required for a bit to go ON or OFF can be measured at high speed within
the Unit, so that ladder programming is not required to measure the operating
time. The trigger edge (ON → OFF or OFF → ON), input number, and output
number can be selected freely, providing flexibility when testing. A warning set
value can be set in the Unit to monitor the operating time, and turn ON a
warning flag in the Status Area when the set value is reached.
The conversion cycle when both analog input points are used is 2.42 ms max.
The AD conversion cycle can be shortened by reducing the number of points
used (i.e., the number of AD conversion points).
Analog Input Terminals can calculate the average of the past eight analog
input values to produce a stable input value even when the input value is
unsteady.
Scaling allows values to be converted according to the industry unit required
by the user. It reduces the number of operations requiring ladder program-
ming in the Master CPU Unit. Scaling also supports an offset function for com-
pensating for errors in scaled values.
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 accordingly 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 accordingly to indicate the status (com-
parator 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.
With Analog Input Terminals, 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 values can be adjusted to compensate for errors in the input or
output voltage or current resulting from the characteristics or connection
Section 1-2