UB25 LINEAR DC RESISTANCE WELDING CONTROL
990-665
F-1
APPENDIX F
RELAY TIMING DIAGRAMS
Introduction
Instructions for relay setup are in
Chapter 5, Section VI, Relay Settings.
Instructions cover the
ON/OFF
state, the
SET RELAY TO
and the
WHEN
states:
•
WELD
•
END OF WELD
•
ALARM
•
OUT OF LIMITS
−
P1 HIGH LIMIT
−
P1 LOW LIMIT
−
P2 HIGH LIMIT
−
P2 LOW LIMIT
The following diagrams show the timing sequence for each relay
WHEN
state.
WELD
When welding, the relay output signal will start within 5 milliseconds after the start of
SQUEEZE
and
will stay energized for 0-150 milliseconds after the end of the
HOLD
period.
