Precision Digital PD554 - Manual (Page 11)

2. Front Panel Buttons and LED Indicators
KEY Function
Pressing SET/ENT key for at least 3 seconds switches between the operating display and
the parameter setting display. This key is used to verify and bypass parameter settings
when in the parameter group display.
Used to change the value of digits when setting parameters.
Used to move between parameter groups.
Used to move to the next digit when setting parameters.
Pressing program button 1 for 1 second runs program 1.
Pressing program button 2 for 1 second runs program 2.
Pressing the rest button for 1 second after a program runs will reset the controller to
"STOP" mode and end all programs.
S / T
(UP/DOWN)
W (SHIFT)
PROG1 (P1)
PROG2 (P2)
RESET (RST)
SET/ENT
(ENTER)
LED Function
EV1,2,3
OUT
AT
PRG1
PRG2
HOLD
LEDs light when c orresponding relays are energized.
LED lights to display when control output is active.
LED lights when auto-tuning is in process.
LED lights while program 1 is running.
LED lights whil e program 2 is running.
LED lights when the program has been paused through the HOLD feature.
Control Keys
LED Display
PD550 Series Nova Programmable Process and Temperature Controller Instruction Manual
11