Entron EN1000 series

ENTRON Controls, LLC. • 700120S • Page 85
The ENTRON UPSLOPE and DOWNSLOPE functions are sequential. The UPSLOPE COUNT
and DOWNSLOPE COUNT setting and the WELD count times are independent of each other.
Adjusting either of the SLOPE COUNTS or WELD count does not affect the setting or operation
of the other switch setting. No arithmetic is involved in setting the SLOPE COUNT.
6.3.1 NO SLOPE – SLOPE MODE=
0000
0000
00
When
0000
0000
00 is programmed, SLOPE is disabled. The output of the welding transformer may look
like a natural UPSLOPE waveform. The welding transformer secondary load characteristics
will affect the rate at which this natural UPSLOPE occurs.
6.3.2 UPSLOPE – SLOPE MODE=
0101
0101
01
When
0101
0101
01 is selected and the control initiated, UPSLOPE will occur before WELD. If the control
sequence is REPEAT mode or PULSATION mode, the UPSLOPE will only occur before the
first weld impulse. If in INTERMITTENT or CONTINUOUS SEAM mode, UPSLOPE will
only occur when first initiated.
When a single schedule is used to program UPSLOPE and WELD as a part of weld sequence
(schedule 10 in example below), starting current by default is equal to one quarter of PERCENT
CURRENT. In this example, starting current is: 60%/4 = 15%; and PERCENT CURRENT
increment is: (60% - 15%)/09 = 5%.
Schedules 11 and 12 are used to show how two CHAINED schedules can be used to program
UPSLOPE and WELD parts of the weld sequence with any other values for starting PERCENT
CURRENT. In this example, starting current is 30%; and PERCENT CURRENT increment is:
(75% - 30%)/15 = 3%.
6.3.3 DOWNSLOPE – SLOPE MODE=
0202
0202
02
When
0202
0202
02 is selected and the control initiated, DOWNSLOPE will occur after WELD. If the
control is in REPEAT mode or PULSATION mode, DOWNSLOPE will only occur after the
last weld impulse. For example, if the schedule has programmed 10 cycles of DOWNSLOPE
and 25 cycles of WELD, DOWNSLOPE will start after WELD. The complete WELD and
DOWNSLOPE time would add to 35 cycles. If in INTERMITTENT or CONTINUOUS SEAM
mode, DOWNSLOPE will only occur when the last initiation, with a programmed
DOWNSLOPE, is removed.
6.3 SLOPE MODES (cont.)
SCHEDULE SQUEEZE
WELD/
HEAT
PERCENT
CURRENT
HOLD OFF IMPULSES COOL
VALVE
MODE
CYCLE
MODE
SLOPE
MODE
SLOPE
COUNT
10 10 26 60 20 00 01 00 01 00 01 09
SCHEDULE SQUEEZE
WELD/
HEAT
PERCENT
CURRENT
HOLD OFF IMPULSES COOL
VALVE
MODE
CYCLE
MODE
SLOPE
MODE
SLOPE
COUNT
11 10 00 30 00 00 01 00 01 02 01 15
12 00 20 75 20 00 01 00 01 00 00 00