IS-120B
4. How to Operate Screens
4-15
(
c
)
NON-CURRENT PULSE COUNT
If the flowing current (or voltage) drops to a certain level,
IS-120B
judges that
no current (or no voltage applied) flows. Then,
[
TROUBLE
]
lamp turns on
(
when the
[
TROUBLE
]
lamp comes on, operation stops automatically.
)
.
In the early period of supply of the power, the current does not flow freely due
to the high secondary resistance of the welding transformer and the
IS-120B
may judge that no current flows (or no voltage is applied).
To prevent such troubles,
NON-CURRENT PULSE COUNT
is used to set the
number of current pulses less than or equal to the specific level (0.8kA in
HIGH
Range, 0.08kA in
LOW
Range) at which
IS-120B
judges that no current flows
(no voltage is applied).
The setting range of this item is 1 through 9. The set number of weak current
pulses is the number obtained by multiplying the number of this item by 10.
Example:
When the system is used at 1000Hz and the above item is set to 2,
the set number of weak current pulses is 2 x 10 = 20.
Since the length of 1 pulse at 1000Hz is 0.5ms, if the current is not
detected for 20 x 0.5ms = 10ms,
IS-120B
judges it as non-current.
(
d
)
CURRENT MONITOR NUMBER
Set the monitor value of the current which is displayed when Miyachi Technos
Monitor Unit
MA-628A
is connected.
1
Monitor value of
WELD1
is displayed.
2
Monitor value of
WELD2
is displayed.
(
e
)
WELD COUNT
If the number of welds performed while the external
WELD COUNT
signal is
input is less than the
WELD COUNT
setting, the
COUNT ERROR
signal is
output
(
See the figure below
)
.
For example, if the number of weld is set to 5 on a PLC, for example, set
WELD
COUNT
to 5.
This function can be turned on and off with
WELD COUNT
(
See
(8)(b)
)
on the
(8) MODE SWITCH
screen.
Weld count
Count trouble
Trouble reset
Number of weld
４
５
１
２
３
４
５
１
２
３
When trouble occurs
Normal operation
