Entron EN1000 series

Page 114 • 700120S • ENTRON Controls, LLC.
9.5 RETRACTION APPLICATION
Retraction is used for welding guns and stationary machines with cylinders and valves configured
for retraction operation. Retraction can be accomplished by de-energizing a valve solenoid,
allowing the electrode arms to separate further than normal to allow large parts to be placed
between welding electrodes.
The retraction valve can be activated by a momentary (
PP
PP
P
.O..O.
.O..O.
.O.=
0808
0808
08) switch closure that toggles the
electrodes between the retracted and non-retracted state or a maintained (
b.S.b.S.
b.S.b.S.
b.S.=
0909
0909
09) closure.
AIR OVER OIL RETRACTION (
PP
PP
P
.O..O.
.O..O.
.O.=
0707
0707
07) is used on welding guns and stationary welders that
incorporate special air over oil cylinders
9.5.1 MOMENTARY CLOSURE –
PP
PP
P
.O..O.
.O..O.
.O.=
0808
0808
08
While the RETRACTION PROCESS OUTPUT is enabled, the TS1-TLS1/AUX1 terminal is
configured as a retraction input. The Temperature Limit Switch normally connected to
terminal TS1-TLS1/AUX1 should be moved to TS1-TLS1/NW1. A momentary closure from
TS1-TLS1/AUX1 to TS1-GND will toggle the valve from the ON to the OFF state. These
contacts are normally tied to a momentary type switch that is independent from the initiation
switch. When the valve is off and the gun is in a fully retracted state, the control cannot initiate
a weld sequence and an ERROR
E.rE.r
E.rE.r
E.r
..
..
.=
2727
2727
27 message will appear on the display if initiation is
attempted. Only when the valve is on and the electrodes are in the pre-weld or extended position
will the initiations be enabled. When Valve 3 is on, VALVE 3 indicator LED on the Control
Panel will be blinking.
The valve output between TS1-SV5 and TS1-SV6 is enabled by toggling the TS1-TLS1/AUX1
to TS1-GND switch. This output remains on during and after a weld as long as switch is not
activated.
SUCCESSIVE schedules can be used with MOMENTARY RETRACTION.
When the retraction valve is on, the control may not be placed into PROGRAM mode. The
TS1-TLS1/AUX1 (retraction input) must be momentarily activated.
If the TS1-TLS1/AUX1 input switch is held closed for a long period of time, ERROR
E.rE.r
E.rE.r
E.r
..
..
.=
0606
0606
06
message will be displayed, but the error condition is abandoned and the valve output will be
toggled upon the opening of TS1-TLS1/AUX1 from TS1-GND. The Control Panel indication
of Valve 3 output (retraction valve) will not indicate the status of PROCESS OUTPUT.