Slope (Current Slope); Fig. 15: Example: Slope In Connection With Impulse Mode - Bosch Rexroth PST 6 Serie Betriebsanleitung

1070087088 / 08 | PST 6xxEx

Slope (current slope)

5.3.3.3
Example: 3 impulses incl. slope
UST = 6 periods (cycles)
DST = 2 periods
IMP = 3
MainWLD = 3 periods
2.CT = 2 periods

Fig. 15: Example: slope in connection with impulse mode

With activated slope, the weld timer automatically generates a linear
current increase/decrease for the 2nd current block within the pro­
grammable time period. This allows current peaks to be reduced and
will thus protect the welding equipment.
For programming you use
• the upslope time (UST) to determine in what period of time the cur­
rent is to be increased from "upslope heat" to the current setpoint of
the MainWLD (2.%I) and/or
• the downslope time (DST) to determine in what period of time the
setpoint current of the MainWLD (2.%I) is to be reduced to the "final
%I value".
Parameter setting in BOS:
In "Programming", flag "Schedule".
Prerequisite: "Slope" parameter is ON.
Please note:
• Current increase and decrease times are always positioned in the
2nd current block.
The current increase time begins with the start of the 2nd current
block.
The current decrease time ends with the end of the 2nd current
block.
• Current increase and decrease times are not influenced by an ac­
tivated impulse mode and a programmed 2.CT, if applicable. This
means, they will take place regardless of an existing 2.CT.
• If the total of UST and DST is greater than the 2nd current block, the
setpoint %I in the 2nd current block (2.%I) will never be reached!
This results in error messages such as "Current too low".
• Use the fade‐out time in connection with the slope (refer to page
278).
MainWLD
2.CT
UST
Bosch Rexroth AG
Information on this product
2nd current block
MainWLD
2.CT
265 / 416
MainWLD
DST