Instruction Manual
ITEM TE700
TECNA
S.p.A.
72/128
The adjustment, made through TA, is to be used when a Rogowsky coil cannot be installed on
the secondary circuit of the spot welder or if set to seam weld mode.
If the seam weld mode is selected when Rogowsky has been selected as current sensor, a
continuous weld cannot be carried out but the minimum COLD 2 TIME will be 8 mS. If TA has
been selected as current sensor, the COLD 2 TIME may be set to 0mS and a continuous
weld may be carried out without any interruptions.
EXT.REF.INPUT
This parameter allows the operator to enable an analogue input in the inverter unit with
dynamics 0 – 10V by means of which a current profile may be supplied to the welder to be
followed through a variable voltage applied at the appropriate input.
VE INPUT
This parameter allows the gauging of the voltage at the electrodes but, before doing so, be
sure that the wires that carry out the measurement are properly installed.
TH TR. PRIM
This parameter allows the setting of the primary thermal current of the welding transformer. If
the value is equal to zero or the value of the TH TR. TIME parameter equals zero, the limit
switch at the thermal current of the welding transformer is deactivated. This function may be
activated only when the inverter unit has been set with an operating frequency of 1000 Hz. If
the operating frequency is greater than 1000 Hz the following message is displayed:
FAIL INIT THERMAL
LIM
CHECK PARAM. CONFIG.
This parameter may be modified only after having set an operating frequency of 1000 Hz. The
function cannot be activated if an operating frequency greater than 1000Hz is set.
TH TR. TIME
This parameter allows the setting of the thermal time constant of the welding transformer. If
the value is equal to zero or the value of the TH TR. PRIM parameter equals zero, the limit
switch at the thermal current of the welding transformer is deactivated. This function may be
activated only when the inverter unit has been set to an operating frequency of 1000 Hz. If the
operating frequency is greater than 1000 Hz the following message is displayed:
FAIL INIT THERMAL
LIM
CHECK PARAM. CONFIG.
The parameter may be modified only after having set an operating frequency of 1000 Hz.