Appendix 2. Diffrence Between Dpcs And Dpcs Emulator; Differences And Notes - Toshiba TOSDIC-CIE DS Manual

Appendix 2. Differences between DPCS and
DPCS Emulator
This appendix describes the difference between DPCS and DPCS Emulator. Please read this notes carefully
before designing a renewal system.

Differences and Notes

Hardware and Performance
Item
CPU
Floating point
arithmetic
Calculation
accuracy
Table A2.1 List of the difference (1)
DPCS
i8085/5MHz x Control
card
Software Emulation
VLCPXn
Arithmetic Processor
- 8232
VACPX2, VPCPX2
- 9511A
VACPX2B,
VPCPX2B
IEEE single precision
floating point. (Except
VACPX2B,
VPCPX2B)
Appendix2. The diffrence between DPCS and DPCS Emulator
DPCE Emulator
Celeron 500MHz
Coprocessor (built-in
CPU)
Equivalent for 80387
IEEE single precision
floating point
Notes
Application performance and execution
period are almost the same as original
DPCS. As DPCS Emulator emulates all
control card programs on single CPU,
the total time of all control card
programs execution must be in the
Control Period.
9511A(VACPX2B, VPCPX2B) uses
different floating pint data format. The
results of calculation can be different.
Input data/parameter of inappropriate
data type in a function block might
produce unexpected results. In such
cases, the output of DPCS and DPCS
emulator can be different.
Equivalent
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