7-23
Note 3. There are parameters that make setting unit changes when the values are
increased with the Digital Operator. The smaller units are, however, used for
communications in such cases. For example, the value in n083 (register 0153
Hex:jumpfrequency1)willbesetin0.01-Hzincrementsifthefrequencyisless
than100Hzand0.1-Hzincrementsifthefrequencyis100Hzorover.Thevalue
0.01 Hz is always 1 Hex for communications.
If the jump frequency is 100.0 Hz, the minimum unit of setting will be
0.01 Hz and the data will be converted as follows:
100.0 (Hz)/0.01 (Hz) = 10000 = 2710 Hex
D Negative Values Expressed in 2’s Complements
If the frequency reference bias in n061 is --100%, the minimum unit of
setting will be 1% and the data will be converted as follows:
100 (%)/1 (%) = 100 = 0064 Hex
® 2’s complement: FF9C Hex
Bit reversed.
1 is added.
Note Whether the data is positive or negative is determined by the parameter set
value.
The MSB of negative-value data is always set to 1. Data with its MSB set to 1 is
not, however, always negative-value data.
For example, the setting range of the n083 parameter (register 0153 Hex: jump
frequency 1) is within a range from 0.00 to 400.00 Hz. If the jump frequency is
400.0 Hz, the data is obtained from the following formula and its MSB will be 1.
400.0 (Hz)/0.001 (Hz) = 4000 = 9C40 Hex
D Setting All Unused Bits to 0
·Bits11through15oftheRUNcommand(register0001Hex)areunused.Whenwriting
the data, be sure to set all of these bits to 0.
These bits when read are set to 0.
D No Data Settings in Unused Registers
·Registers described “not used” may be used for internal processing. Do not write any
data to such registers.
Communications Chapter 7
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