Panasonic FP Series User Manual

Appendix Programming Information
1251
40.4 Real Numbers
Instructions used with the FP10SH and the FP2 series allow the use of real numbers for calculation. Real
number types available are floating point constants and BCD constants.
40.4.1 Floating Point Constant (f)
Floating point constants consist of two words processed by single precision floating point logic. There are up to
seven effective digits. The mantissa is 23 bits and the exponent is 8 bits. (Based on IEEE754)
31 30 29 23 22 16
... ...
14 13 12 3 2 1 015
...
Bit position
Exponents (8-bit)
Mantissa (23-bit)
0 positive
1 negative
Sign bit:
Numbers which can be used are: ±(1.175494 x 10
-38
to 3.402823 x 10
38
).
40.4.2 BCD Type Constant
BCD-type floating-point constants are processed as three words as shown below.
Example
DTx
DTx+1
DTx+2
Sign: 0 when positive
1 when negative
Integer:
Decimal:
Numbers which can be used are as follows: -9999.9999 to 9999.9999
The principal instructions which allow use of BCD constants are:
 F300 BSIN BCD type sine operation
 F301 BCOS BCD type cosine operation
 F302 BTAN BCD type tangent operation
 F303 BASIN BCD type arcsine operation
 F304 BACOS BCD type arccosine operation
 F305 BATAN BCD type arctangent operation
In FPWIN Pro use 16# to specify a BCD constant. This data type is implemented as ARRAY 0..2 OF WORD.

Panasonic FP Series Specifications

General

Mounting	DIN rail
Type	PLC
Communication Interface	RS-232, RS-485, Ethernet (depending on model)
Input Voltage	100-240V AC or 24V DC (depending on model)
Output Type	Relay, Transistor
I/O Points	Varies by model
Operating Temperature	0°C to 55°C
Dimensions	Varies by model
Weight	Varies by model