Weld334m - User’s manual
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2.
Characteristics and general description of the Weld334m
2.1
General description
The Weld334m is a control device intended for single-phase AC powered, resistance welding
machines. It is capable of managing all the operations run by the machine it is associated
with; the Weld334m also provides adequate diagnostics for the plant and welding process
and carries out welding current regulation by chopping the voltage applied to the power
transformer.
The Weld334m can be field programmed via the HHT4300 graphic unit or, through the
centralising network, via a remote computer equipped with the WMS software and the
adequate communication card.
It permits running up to a maximum of 255 welding programs and 16 different self-
increment programs (stepper). The internally mounted clock provides the correct absolute
timing reference; this function is also available for the stand-alone utilisation, meaning with
independent control.
The HHT4300 programming unit is removable, thereby preventing any interference of
unauthorised personnel on the welding programs.
The operating frequency of the unit is 50Hz or 60Hz.
Facility is also provided to memorise and transfer data and programs through a commercially
available PCMCIA type memory card.
The welding control interfaces with a number of equipment and actuators, e.g. welding
solenoid valves, process controllers (PLC) and robots, by connecting with the field or with
standard wiring or through a serial line (optic fiber) in conformity with the Profil-C0 protocol
of Interbus-S standard.
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