GE b30, Instruction Manual, Page: 329 / 632

CHAPTER 5: SETTINGS PRODUCT SETUP
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-121
5
When testing is in progress, the LEDs are controlled by the test sequence, rather than the protection, control, and
monitoring features. However, the LED control mechanism accepts all the changes to LED states generated by the relay
and stores the actual LED states (on or off) in memory. When the test completes, the LEDs reflect the actual state resulting
from relay response during testing. The reset pushbutton does not clear any targets when the LED Test is in progress.
A dedicated FlexLogic operand,
LED TEST IN PROGRESS
, is set for the duration of the test. When the test sequence is initiated,
the LED TEST INITIATED event is stored in the event recorder.
The entire test procedure is user-controlled. In particular, stage 1 can last as long as necessary, and stages 2 and 3 can be
interrupted. The test responds to the position and rising edges of the control input defined by the
LED TEST CONTROL
setting. The control pulses must last at least 250 ms to take effect. The following diagram explains how the test is
executed.
Figure 5-51: LED test sequence
Application example 1
Assume one needs to check if any of the LEDs is “burned” through user-programmable pushbutton 1. Apply the following
settings.
Configure user-programmable pushbutton 1 by making the following entries in the
SETTINGS

PRODUCT SETUP

USER-
PROGRAMMABLE PUSHBUTTONS  USER PUSHBUTTON 1
menu. (The option does not display when not purchased.)
PUSHBUTTON 1 FUNCTION
: “Self-reset”
PUSHBTN 1 DROP-OUT TIME
: “0.10 s”
Configure the LED test to recognize user-programmable pushbutton 1 by making the following entries in the
SETTINGS

PRODUCT SETUP  USER-PROGRAMMABLE LEDS  LED TEST
menu:
LED TEST FUNCTION
: “Enabled”
LED TEST CONTROL
: “
PUSHBUTTON 1 ON
”