Technical data

RS485 and RS232 Installation and Start-up Guide A-1
Appendix A – Parameter Scaling
This chapter is intended for people who are using the drive data through the
Modbus connection, and need to know in what units the data is available for
reading and writing.
Effect of Resolution
Parameter values are read and written through serial communication using
integer values. When the given parameter resolution is 0.1, desired value must
be multiplied by 10 to produce the integer value.
For example, to set parameter 2202
ACCELER TIME 1 (resolution 0.1 s) to the
value of 60.5 s, value 605 must be written through serial communication.
Signed Values
Normally, parameter values are represented as signed integers. Negative
values are given in the 2’s complement format. To calculate the 2’s
complement, take the corresponding positive value, negate it and add 1.
Signed integer values range from -32768 to 32767.
Note! Diagnostic counter values (parameters 5206 - 5215) are represented as
unsigned integers. In this case values extend from 0 to 65535.
The parameters and their resolutions are listed in the ACS 160 User’s Manual.