VIPA PC-CPU 486, Руководство пользователя

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Chapter 3 BIOS / Register Manual VIPA PC-CPU 486
3-14 HB111E - Rev. 02/32
For the communication to the CPU there are 4 page frames available at the
CPU. The communication has to be realized at the PLC side with an
according PLC application, at the PC side with C-functions. A more
detailed description of the C-functions is to find in the header file and in the
sources.
Note!
This kind of communication with a CPU is only possible when you're
operating the PC as CP. The according adjustment has to take place in the
BIOS in the "VIPA Configuration". Choose the CPU Mode "disable".
The project engineering in the hardware configurator from Siemens is as
S5 adapter in the hardware catalog under simatic400/im-400/s5-adapter
without additional parameters.
The CPU supports up to 255 page frames with a length of each 1kByte.
The PC may use up to 4 page frames for the communication with the CPU.
Starting with the basic page frame that you have to set, the following 3
ascending page frames are occupied by the PC:
Page frame
Byte 0
Page frame
Byte 1023
b+0
b+1
b+2
b+3
Page frame number = 4
Page frame base b
255
Page frame length = 1K
CPU Address range
256 Page frame
Page frame
interface to
S7-400
from Siemens
Outline
Structure