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SYSTEM DATA
12.11 Digital Inputs Setpoints
54
The S3 setpoints page is for entering the characteristics of the digital inputs. In our
example, these characteristics are specified under the Control System Requirements
heading. Program the S3 setpoints as indicated.
Some of the functions assigned to the digital inputs of the 469 Motor Management Relay
are pre-defined functions, which can be selected from a list. There are four user-defined
functions, called General Switch A to D, associated to the assignable inputs. Set these
inputs to operate output relays, with or without delay, responding to the status change of
dry contacts connected to the digital input terminals. Use the following procedure to set
these functions:
1.
Change the default names to meaningful values so they can be easily identified, either
via the LCD or when reviewing event reports.
2.
Identify their asserted logic.
3.
Define the functionality of the digital inputs.
All the other assignable input functions are pre-defined, and when selected, they can be
set to generate Trip or Alarms, as well as to energize auxiliary outputs as needed.
For breaker position monitoring, set the following pre-defined Digital Input called "Starter
Status". As per the information provided above, a 52b contact will be used, and must be
connected between terminals D16 to D23:
S3 DIGITAL INPUTS
To set the relay to monitor access to the station, use Assignable Input 1 as "General Switch
A", as follows. To define the digital input, enter the following data in the
setpoints page.
ASSIGNABLE INPUT 1
To identify the digital input:
: "General Sw. A"
INPUT 1 FUNCTION
: "Stn. Monitor"
SWITCH NAME
To define the asserted logic:
: "Normally Open"
GENERAL SWITCH A
To define the functionality:
BLOCK INPUT FROM START
GENERAL SWITCH A ALARM
ASSIGN ALARM RELAYS
GENERAL SWITCH A ALARM DELAY
GENERAL SWITCH A EVENTS
GENERAL SWITCH A TRIP
If the relay will not be used to trip the motor when someone gain unauthorized access to
the station, the next setpoints shall be left with their default values:
GENERAL SWITCH A TRIP
: "Trip"
ASSIGN TRIP RELAYS
GENERAL SWITCH A TRIM DELAY
STARTER STATUS
STARTER STATUS SW
: "0 s"
: "Latched"
: "Alarm"
: "5.0 s"
: "On" so this event is registered.
: "Off"
: "Off"
: "5.0 s"
469 MOTOR MANAGEMENT RELAY – QUICK REFERENCE GUIDE
QUICK REFERENCE GUIDE
: "Starter Auxiliary b"
S3 DIGITAL INPUTS
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