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Mains load optimization (ASM procedure)
For systems in which several Power Controllers are employed in full wave switch mode TAKT, it is
possible that individual Power Controllers are synchronized so that a regular mains load is achieved
by defi ned switching of the individual Power Controller in sequence. This avoids load peaks by
random simultaneous switching of many Power Controllers and load troughs are fi lled up. The
upstream transformer and/or the upstream feed point may be designed for a lower load. Besides
savings in investment and operating cost, lower mains reactions also result.
2.2 SET POINT CONTROL CHARACTERISTIC
The set point control characteristic of Thyro-P may be easily adapted for the control output signal
of the upstream process controller or automation system. All signals customary on the market may
be used. The adaption is made by changing the starting and ending points of the control characte-
ristic. Inverted operation (ending value is smaller than the starting value in voltage or current) is also
possible.
The effective set point is the total set point. It is formed by adding the four set points as shown in
fi g. 2.
In the simplest case all the set point values are added algebraically. The prerequisite for a set point
to infl uence the total set point value is that it must be enabled by the set point Enable Register.
• Set point 1 (X5.2.10 - X5.1.13 ground) 0-20mA default
• Set point 2 (X5.2.11 - X5.1.13 ground) 0-5V default
The inputs set point 1, 2 are two electrically equal analogue inputs for current or voltage signals,
with subsequent A/D converter (resolution 0.025% of the fi nal value), and they may be set to the
following signal ranges:
0(4)-20 mA (Ri about 250⍀) max. 24mA siehe ”ATTENTION“
0-5 V (Ri about 8,8k⍀) max. 12V
0-10 V (Ri about 5k
⍀) max. 12V
The following table shall be used for the hardware confi guration of the set point inputs (see also
FILE COMPONENT MOUNTING DIAGRAM CONTROL DEVICE, fi gure 10). If the hardware con-
fi guration is changed, the Thyro-P parameters must be changed accordingly with the LBA or the
Thyro-Tool.
X221 for Set point input 1
Bridge X221 Signal range Set point input 1
closed* 0(4) -20mA (X5.2.10)
open 0-5V / 0-10V (X5.2.10)
X222 for Set point input 2
Bridge X222 Signal range Set point input 2
closded 0(4)-20mA (X5.2.11)
open* 0-5V / 0-10V (X5.2.11)
* default
ATTENTION
If the open-circuit voltage of the connected set point exceeds 12V in the 20mA signal range, the
set point inputs can be destroyed, if the belonging bridge (X221, X222) is open.
Within the stated input ranges, these values with the control characteristic may be adjusted to any
common signal characteristic.