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SIMATIC 545/555/575 System Manual
Installing 575 System Hardware
4.9 Installing the Floating-Point Coprocessor (Optional)
The 575–2104 CPU has a socket for a Motorola MC68882 floating-point
coprocessor (12.5 MHz or faster). If you install a floating-point coprocessor
in this socket, you may create external subroutines (XSUBs) to perform high
speed floating-point calculations; (the 575–2104 operating system does not
otherwise use the floating-point coprocessor). Installation of the math
coprocessor (PPX:2589739–8010) is illustrated in Figure 4-14.
The 575–2105 and 575–2106 CPUs have the Motorola MC68882
floating-point math coprocessor built onto the board, which is automatically
used in conjuction with PowerMath.
Alignment notch
on silkscreen
Alignment
mark
Figure 4-14 Installing the Math Coprocessor on the 575–2104 CPU
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