Siemens SENTRON PAC3120 Manual page 26

Description
2.3 Average values and counters
Defining the limit values
The following must be specified for each of the six limit values in order to program the limit
monitoring function:
● Limit monitoring on/off
● Monitored measured variable
● Upper or lower limit violated
● Limit
● Time delay
● Hysteresis
Combining the limit values
Figure 2-1
The following operators are available:
● AND
● OR
The placeholder "----" means: This limit value is not combined with any other limit value.
The logic combines limit values 0 to 5 as follows:
(((((opLIM0 opLIM1 LIM1) opLIM2 LIM2) opLIM3 LIM3) opLIM4 LIM4) opLIM5 LIM5)
LIM0
LIM1
LIMx
op
The brackets in the formula show that the AND/OR priority rule does not apply.
The result of the logic operation is the "LIMIT LOGIC".
24
Device setting "LIMIT LOGIC"
represents limit value 0
represents limit value 1
represents limit value x
represents the logic operator AND/OR in the formula
PAC3120 and PAC3220
Equipment Manual, 10/2019, L1V30425208F-01