Omron J7 series, User Manual

Page: 124 / 177

110
Setting the Communications Data
Chapter 7-6
Negative Values Expressed in 2’s Complements
If the frequency reference bias in n42 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
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.
Setting All Unused Bits to 0
Bits 9 through 15 of the RUN command (register 0001 Hex) are unused.
When writing the data, be sure to set all of these bits to 0. These bits when
read are set to 0.
No Data Settings in Unused Registers
Registers described “not used” may be used for internal processing. Do not
write any data to such registers.
Bit reversed.
1 is added.