Hitachi CONVENTION 14 Instruction Manual page 264

ModBus Holding Registers
The following tables list the holding registers for the inverter interface to the network.
The table legend is given below.
Function Code - The inverter's reference code for the parameter or function (same as
inverter keypad display)
Name - The standard functional name of the parameter or function for the inverter
R/W - The read-only(R) or read-write access(R/W) permitted to the data in the
inverter
Description - How the parameter or setting works (same as Chapter 3 description).
Reg. - The network
byte and low-byte address.
Range - The numerical range for the network value that is sent and/or received
TIP: The network values are binary integers. Since these values cannot have an
embedded decimal point, for many parameters it represents the actual value (in
engineering units) multiplied by a factor of 10 or 100. Network communications must
use the listed range for network data. The inverter automatically divides received
values by the appropriate factor in order to establish the decimal point for internal use.
Likewise, the network host computer must apply the same factor when it needs to work
in engineering units. However, when sending data to the inverter, the network host
computer must scale values to the integer range listed for network communications.
Resolution - This is the quantity represented by the LSB of the network value, in
engineering units. When the network data range is greater than the inverter's
internal data range, this 1-bit resolution will be fractional.
Func.
Name
Code
Output frequency
command
Inverter status
Process Variable (PV)
register address offset
List of Holding Registers
R/W Description
R/W Inverter output frequency (set
A001=03 to enable this network
register),
range is 0.0 to 400.0 Hz
R 00...Initial status
01...(Reserved)
02...Stop Mode
03...Run Mode
04...Free-run stop (FRS)
05...Jogging
06...DC braking
07...Retry
08...Trip alarm
09...Under-voltage
R/W PID loop PV value from the
network (set A076=02 to
enable this setting), range is
0.0 to 100.0%
for the value. Some values have a high-
Reg.
0002h
0003h
0005h
B − 21
B 21
Network Data
Range Res.
0 to 4000 0.1 Hz
0 to 9
0 to 1000 0.1%