GE Industrial Solutions Entellisys System User Manual - Manual (Page 148)

FlexLogic™ 148
11
The characteristics of the different types of operands are listed in Table 11-1.
Table 11-1 FlexLogic operand types
Operand type State Example format Characteristics [Input is ‘1’ (= ON) if...]
Contact Input On Contact Input On Voltage is presently applied to the input
(external contact closed).
Off Contact Input Off Voltage is presently not applied to the input
(external contact open).
Contact Output On Contact Output On Voltage exists across the contact.
Off Contact Output Off Voltage does not exist across the contact.
Element (Analog) Pickup LONG TIME 1 PKP The tested parameter is presently above the
pickup setting of an element, which responds
to rising values, or below the pickup setting
of an element, which responds to falling
values.
Dropout LONG TIME 1 DPO This operand is the logical inverse of the
above PKP operand.
Operate LONG TIME 1 OP The tested parameter has been above/below
the pickup setting of the element for the
programmed delay time, or has been at logic
1 and is now at logic 0 but the reset timer has
not finished timing.
Fixed On On Logic 1
Off Off Logic 0
Virtual Input On Virtual Input 1 On The virtual input is presently in the ON state.
Virtual Output On Virtual Output 1 On The virtual output is presently in the set state
(i.e., evaluation of the equation which
produces this virtual output results in a “1”).