Omron SYSMAC CS Series Operation Manual page 18

Features and Functions
Alarm output
Alarm output
Rate-of-change
Calculation and Alarm
LL
Alarm setting
(low low limit)
Alarm setting L (low limit)
The Analog I/O Units listed below calculate the rate of change for the process
value, and output an alarm when the high or low limit is exceeded. The rate-
of-change value is derived by taking the difference each second between the
process value at that time and the process value before the comparison time
interval. The comparison time interval can be set from 1 to 16 seconds. This
allows even a small process value rate of change to be detected.
This function is supported by the following Units:
CS1W-PTS01-V1 Isolated-type Thermocouple Input Unit
CS1W-PTS02/PTS03 Isolated-type Resistance Thermometer Input Unit
CS1W-PTW01 Isolated-type 2-Wire Transmitter Input Unit
CS1W-PDC01 Isolated-type Analog Input Unit
L H HH
(low limit) (high limit) (high high limit)
H (high limit)
Section 1-2
Process value input
Process value input
5