TECO F33 Series, Instruction Manual, Page: 139 / 192

136 Functional Description
Communication information
11.6.2 Logic Output Y [620]
By means of an expression editor, the comparator sig-
nals can be logically combined into the Logic Y function.
The expression editor has the following features:
• The following signals can be used:
CA1, CA2, CD1, CD2 or LZ (or LY)
• The following signals can be inverted:
!A1, !A2, !D1, !D2, or !LZ (or !LY)
• The following logical operators are available:
"+" : OR operator
"&" : AND operator
"^" : EXOR operator
Expressions according to the following truth table can
be made:
The output signal can be programmed to the digital or
relay outputs or used as a Virtual Connection Source
[560]
.
Communication information
The expression must be programmed by means of the
menus [621] to [625].
Example:
Broken belt detection for Logic Y
This example describes the programming for a so-
called “broken belt detection” for fan applications.
The comparator CA1 is set for frequency>10Hz.
The comparator !A2 is set for load < 20%.
The comparator CD1 is set for Run.
The 3 comparators are all AND-ed, given the “broken
belt detection”.
In menus [621]-[625] expression entered for Logic Y is
visible.
Set menu [621] to CA1
Set menu [622] to &
Set menu [623] to !A2
Set menu [624] to &
Set menu [625] to CD1
Menu [620] now holds the expression for Logic Y:
CA1&!A2&CD1
which is to be read as:
(CA1&!A2)&CD1
Y Comp 1 [621]
Selects the first comparator for the logic Y function.
Modbus Instance no/DeviceNet no: 43408
Profibus slot/index 170/57
Fieldbus format UInt
Modbus format UInt
Input Result
A B & (AND) + (OR)
^
(EXOR)
0 0 0 0 0
0 1 0 1 1
1 0 0 1 1
1 1 1 1 0
Modbus Instance no/DeviceNet no: 31035
Profibus slot/index 121/179
Fieldbus format Long
Modbus format Text
620 LOGIC Y
Stp CA1&!A2&CD1
NOTE: Set menu [624] to "
.
" to finish the expression
when only two comparators are required for Logic Y.
Default: CA1
CA1 0
!A1 1
CA2 2
!A2 3
CD1 4
!D1 5
CD2 6
!D2 7
LZ/LY 8
!LZ/!LY 9
T1 10
!T1 11
T2 12
!T2 13
621 Y Comp 1
Stp CA1
A