MODEL 207A AND 207A-1
OPERATION MANUAL
Doc. No. 740044
Rev F
SECTION IV - SYSTEM FUNCTIONS
4.6 FAULTS (continued)
The method of alerting the operator depends on what the fault is and when it
occurs. A problem with TEMP, LVPS or INPUTAC when the M-207A is first
turned on will create a FAULT SCREEN and the fault must be corrected before
the M-207A will proceed with any other functions.
A problem with COOL, GAS or SENSOR is common at power on or when
preparing for welding. These items will only create the FAULT SCREEN if they
occur during a weld sequence. BAD START appears only during weld sequence
(after pre-purge) and does not create a fault screen.
STUB OUT and HIGH VOLTS will only occur during a weld and will cause an
ALL STOP condition. After postpurge the normal “return to home” sequence will
also be disabled.
4.7 SENSOR 1, 2, 3 FAULTS
The M-207A has 3 separate inputs that the user can define for creating a fault
condition based on some external problem. The most common would be
connecting a gas analyzer (s) to the M-207A to detect excessive Oxygen in the
I.D. purge of a weld.
The user must make these connections and use the SET-UP screen (see 4.8) to
define what a fault is for this external input.
4.8 SET-UP FUNCTIONS
The following SET-UP functions provide some customizing and calculation
features to enhance system performance:
1. CALCULATE
- Calculates TUNGSTEN LENGTH or performs IPM to
RPM conversions or calculates total LEVEL TIME required. All of these
calculations are used during weld procedure development.
2. WELD-SELECT - The optional REMOTE PENDANT may select up to 4
pre-determined weld schedules from memory. This function defines which
of the schedules may be selected.
4.13
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