IS-200A
12. Troubleshooting
12-4
(2) When a Welding Does not Start Even if the Start
Signal is Input
When a welding does not start even if the start signal (2ND STAGE signal) is
input, the following causes can be thought.
READY does not light up.
Start signal is shorter than DELAY START SET time setting.
Start signal is input while the END signal is output.
Start signal is input during communicating with the MA-627A.
Ta
T
Tb1 Tb2
Tc1 Tc2
SQD
SQZ
WE1
HOLD
END
T : DELAY START SET
2ND STAGE
Ta : Data communication
time at start
(Note 1)
(Note 2)
(Note 3)
(Note 4)
CAUTION
HEAT Ⅰ
Tb : MA-627A Data
transmission time at end
transmission time at end
Tc : External comm. Data
(Note 1) When the next start signal is received while the monitor error is
displayed on the MA-627A, the caution signal is turned OFF and the
previous screen is displayed.
At this time, the data is transferred to the MA-627A from the Power
Supply. The start signal is not received while the data is transferred.
(Ta: 31
ms max. in the figure above.)
When the monitor error is displayed, input the start signal more than
(Ta + T) time.
(Note 2) When the sequence ends, the END signal is output after HOLD. The
start signal is not received while the END signal is output.
To make start takt faster, lower the output time of END signal. (Can
be set in 10-ms increment. The minimum value is 10
ms.)
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