GE 750 Instruction Manual page 153

CHAPTER 5: SETPOINTS
5.4.2 Logic Inputs Setup

LOGIC INPUTS
SETUP
750 FEEDER MANAGEMENT RELAY – INSTRUCTION MANUAL

PATH: SETPOINTS S3 LOGIC INPUTS
[]
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
Each logic input has two setpoints representing the name and asserted logic. The following
terms apply to all logic inputs:
• The state of a contact input is either "Open" or "Closed" and is determined directly
from the rear terminal inputs.
• The state of a virtual input is either "On" or "Off" and can be set from serial
communications or the
• The state of a logic input is either "Asserted" or "Not-Asserted".
• The state of Logic Input n (where n = 1 to 14) is determined by combining the state
of Contact Input n with the state of Virtual Input n according to the
setpoint; this is a limited form of programmable logic.
ASSERTED LOGIC
• The state of Logic Input x (where x = 15 to 20) is determined by the state of Virtual
Input x according to the
programmable logic.
• A logic function is invoked when its corresponding logic input is Asserted.
• One logic input can invoke many logic functions if required.
The setpoint allows the operator to assign a user-friendly description
LOGIC INPUT N NAME
to logic inputs when replacing panel switches with a virtual switch. This name will be
displayed in the
A1 STATUS
The
LOGIC INPUT N ASSERTED
Input states to determine the Logic Input state. For Logic inputs 1 through 14, this setpoint
may be assigned the following values:
Value
Disabled
Contact Close
Contact Open
Virtual On

LOGIC INPUTS SETUP
INPUT 1 NAME:
Logic Input 1
INPUT 1 ASSERTED
LOGIC: Contact Close
INPUT 2 NAME:
Logic Input 2
INPUT 2 ASSERTED
LOGIC: Contact Close
↓
INPUT 20 NAME:
Logic Input 20
INPUT 20 ASSERTED
LOGIC: Contact Close

A1 STATUS VIRTUAL INPUTS
INPUT Y ASSERTED LOGIC
actual values menu.

VIRTUAL INPUTS
setpoint determines how to combine the Contact and Virtual
Logic Input Asserted When:
Never
Contact is closed
Contact is open
Virtual input is on
S3 LOGIC INPUTS
Range: 18 alphanumeric
characters
Range: see description
below
Range: 18 alphanumeric
characters
Range: see description
below
Range: 18 alphanumeric
characters
Range: see description
below
actual values menu.
INPUT N
setpoint; this is a limited form of
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