Contrel EMA-D6, Instruction Manual, Page: 17 / 22

pag. 17 / 22
LOGIC EXPRESSION menu
LOGIC EXPRESSION n (n=1..8)
UoM Default Range
1 Enable - NO YES-NO
2 Compute timing sec/min 1 sec 1-2-3-5-6-10-12-15-20-30 sec
1-2-6-5-6-10-12-15-20-30-60 min
End of day
End of week
End of month
3 Source 1 - - Internal measures-(measures node 1-20)
4 Group 1 - - Instantaneous-Average-Energies-
Digital inputs-Counters-Analog input-Math
5 Item 1 - - OFF-(measures)
6 Multiplier 1 - 1 1-100000
7 Divisor 1 - 1 1-100000
8 Operation - Sum Sum-Subtraction-Multiplication-Division
9 Source 2 - - Internal measures-(measures node 1-20)
10 Group 2 - - Instantaneous-Average-Energies-
Digital inputs-Counters-Analog input-Math
11 Item 2 - - OFF-(measures)
12 Multiplier 2 - 1 1-100000
13 Divisor 2 - 1 1-100000
NOTE: this menu is divided into 8 sections, for logic expression LE1..8
1
- Expression enabled.
2 - Selection of refresh calculation. Expression value is updated with the results of the last calculation.
3 - First measurement source. Internal measures or measures referred to the external devices (when EMA-D6 will be configured as Master RS-485).
4 - First measurement group that generates the alarm.
5 - Define which measurement of the device as the first operand.
6 - Multiplying factor referred to previous measurement.
7 - Dividing factor referred to previous measurement.
8 - Math operation between first and second operands.
9, 10, 11, 12, 13 - (see above).
Power factor rules