Functional Description
Edition: 02
3 - 3
accuSpin
1R
17.11.03 He/Ha
Main Board Functions (continued)
•
Frequency Converter
The motor is provided 3-phased with chopped direct voltage blocks. These blocks are
variable in frequency and pulse width modulation and are dephased to 120° between the
motor windings. Beginning with low frequency and small pulse width chopped blocks,
both parameters will be increased up to the operators set speed. By this variation the
acceleration power of the drive motor can be effected. For deceleration the frequency
and pulse width parameters will be reduced. The frequency converter is protected
against over current and over voltage.
3.2.3 Micro Controller (Central Processing Unit)
The controller block includes the central processor unit (CPU) 87C51FB and the data
storage (NV-RAM) 9366 with the software identification No. for:
•
CPU: 0498 (second displayed No. in speed field)
•
RAM: 4599 (third displayed No. in speed field)
The second parts of these No.'s (displayed in the time field) will be upgraded if necessary.
The ROM with control program is integrated in the CPU. The most important operating
parameters (e.g. the maximum data or the last operator settings) are stored in the NV-RAM.
