Automation Operators - GE D90 Plus Instruction Manual

AUTOMATION LOGIC

Automation operators

Editing operators
Automation one-shots
Boolean operators and latches
476
Type State
Virtual On
output
The following operators are available for the creation of automation logic:
• One-shots
• Boolean operators and latches
• Math operators
• Virtual outputs
• Comparators
• Timers
Unlike earlier versions of the D90
latches and not through setting menus.
The following sections provide detail on these operators.
The table outlines automation editing operators.
Table 31: Automation logic editing operators
Syntax Description
Insert an operand in an equation list
INSERT
Delete an operand from an equation list
DELETE
The first END encountered signifies the last line in the list of processed
END
logic operands
The table outlines automation one-shot syntax.
Table 32: Automation logic one shots
Syntax Description
One shot that responds to a positive-going edge
POSITIVE ONE SHOT
One shot that responds to a negative-going edge
NEGATIVE ONE SHOT
One shot that responds to both the positive and negative-going edges
DUAL ONE SHOT
A one-shot accepts any digital input or the output of any logical operator. Its output asserts
for one scan following a transition of its input. A negative one-shot operates on a falling
edge of its input, and a positive one-shot operates on a rising edge of its input. A dual one-
shot operates on a rising edge or falling edge of its input. A total of 64 one-shots are
Plus
available in the D90 automation controller.
Figure 406: One-shot used in automation logic
The table outlines Boolean logic and latch syntax.
Example Characteristics (input is logic 1 or "on" if...)
The virtual output is presently in the on state
VIRT OP 1 ON
Plus
, automation timers are implemented like gates or
PLUS
D90 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 8: AUTOMATION