IDEC High Performance Series - Manual (Page 32)

1 WindO/I-NV2 Specifications
2-2 WindO/I-NV2 User’s Manual
1.2 Available Data
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Data types
Data type is the format of the data related to the minimum and maximum values of data that can be processed by a
part and handling of negative and real numbers.
Data types and data ranges that can be used on the MICRO/I and WindO/I-NV2 are listed below.
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Numeric value handling by data type
Data stored in devices is handled as described below.
Data type Required word count Processable data range
BIN16 (+) 1 0 to 65535
BIN16 (+/-) 1 -32768 to 32767
BIN32 (+) 2 0 to 4294967295
BIN32 (+/-) 2 -2147483648 to 2147483647
BCD4 1 -999 to 9999
BCD8 2 -9999999 to 99999999
float32 2 -3.4x10 38 to -1.18x10 -38 , 0 , 1.18x10 -38 to 3.4x10 38
Data type Data handling
BIN16 (+) Data is handled as an unsigned 16-bit integer.
BIN16 (+/-)
Data is handled as an signed 16-bit integer.
If the sign bit (bit 15) is 1, the value is two’s complement.
BIN32 (+)
Handled as an unsigned 32-bit integer with the starting address
as the lower word.
BIN32 (+/-)
Handled as a signed 32-bit integer with the starting address as
the lower word.
If the sign bit (bit 31) is 1, the value is two’s complement.
BCD4
Data is handled as a four digit (16-bit) binary-coded decimal
value.
Each four bits from bit 0 to bit 11 is handled as the absolute
value for the 1st to 3rd digit.
Bit 12 to bit 15 is handled as the minus sign (-) when its value is
F (hex) and it is handled as the absolute value for the 4th digit
when 0 to 9 (hex).
BCD8
Data is handled as an eight digit (32-bit) binary-coded decimal
value.
Each four bits from bit 0 to bit 27 is handled as the absolute
value for the 1st to 7th digit.
Bit 28 to bit 31 is handled as the minus sign (-) when its value is
F (hex) and it is handled as the absolute value for the 8th digit
when 0 to 9 (hex).
bit bit
15 0
1 word
bit bit
15 0
1 word
Sign bit
bit
31 bit
0
Upper word Lower word
bit
0
bit
31 Lower word Upper word
Sign bit
bit bit
15 0
1 word
Sign
1st 2nd 3rd
Absolute value
bit
0
bit
31
Absolute value
Lower word Upper word
Sign
1st 2nd 3rd 4th 5th 6th 7th