KBR multicomp F144-MS-1V1C1TI6DO6RO-3 - Data Formats

Rev. 1.00
22586_EDEBDA0253-0318-1_EN
51
KBR multicomp F144-3 6DO/6RO
13.1 Modbus commands supported
0x04 Read input registers
0x2B Read device identication
The multicomp F144-3 does not support broadcast commands. All Modbus
commands described are device-specic commands.
13.2 Data formats
(unsigned) short: 0x1234
Address +0 +1
Contents 0x12 0x34
Rule for byte sequence: MSB before LSB
(unsigned) long: 0x12345678
Address +0 +1 +2 +3
Contents 0x12 0x34 0x56 0x78
Rule for byte sequence: MSB before LSB
oat:
Format Complies with the IEEE 754 standard
Representation 4 bytes
Accuracy 24 bits (
represent >7 decimal points)
Composition 24-bit mantissa; 8-bit exponent
Mantissa 24 bits (M) + 1 bit (S)
Exponent The MSB of the mantissa is always 1 => it is not saved
separately! S = sign of the mantissa: S = 1
negative
number; S = 0
positive number
Exponent 8 bits (0-255); is saved relative to 127, i.e. the current
value of the exponent is calculated by subtracting the
number 127 from the saved value.
Curr. exp. = saved exp value. – 127
=> range from 128 to -127!