CHAPTER 3: USING PROGRAMMING FUNCTIONS
IS-300CA INVERTER POWER SUPPLY
3-44 990-418
START ON STEP #
The counting of welds starts from the STEP set here. For example, if you select START ON
STEP #3
as shown above, welds will be counted from the first weld in STEP3, even if welding
for the first time. Further, the welding current will be increased (or reduced) by the extent you
have set this value for STEP3. Set the desired STEP number. 1–9 for VALVE1 and VALVE2
respectively.
STEP 1–9. Set the welding current step-up ratio (RATIO) and the number of welds (COUNT)
for each STEP. The sequence will proceed to the next STEP when the set number of welds is
reached.
VALVE # Make settings for (a) and (b) above for each valve number. Change the number to set
the schedule for each valve.
NOTE: Upper/Lower limit judgment value when STEPPER MODE is set to ON
The upper/lower limit judgment value set here is for the current when a welding is performed,
not for the initial setting. Therefore, when STEPPER MODE is set to ON to perform step-up
(step-down) for the initial setting, the upper/lower limit judgment value is stepped up or down
automatically.
RATIO has an effect on HEAT only. Fixed for UF/DL. When the HEAT value multiplied by
RATIO falls below the UF/DL value, an error occurs.
Example: When the current is set to 2 kA, H; 2.2 kA, L; 1.8 kA. When the step becomes 150%,
H and L become as follows.
H: 2.2 x 1.5 = 3.3 kA
L: 1.8 x 1.5 = 2.7 kA
c. VALVE #
Make settings for (a) and (b) above for each valve number. Change the number to set the schedule
for each valve.
NOTE: Upper/Lower limit judgment value when STEPPER MODE is not OFF
The upper/lower limit judgment value set here is for the current when a welding is performed,
not for the initial setting.
Therefore, when STEPPER MODE is not OFF to perform step-up (-down) for the initial setting,
the upper/lower limit judgment value is stepped up or down automatically.
RATIO has an effect on HEAT only. Fixed for UF/DL.
When the HEAT value multiplied by RATIO falls below the UF/DL value, an error occurs.
Example) When the current is set to 2kA, HIGH; 2.2kA, LOW; 1.8kA.
When the step becomes 150%, HIGH and LOW become as follows.
HIGH: 2.2 x 1.5 = 3.3kA
LOW: 1.8 x 1.5 = 2.7kA
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