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Instance SizeWriteReadDefaultSetting
range
ContentNameAttribute
01
1A Power scale Power data unit selection can be set and
read. The power data unit value is
calculated as follows:
Unit = 0.1 [W] x 1/2
c
c: Power scale set value
Set a negative value as its 2’s
complement.
–15 to 15
(F1 to 0F
hex)
00 Yes Yes Byte
1B Voltage scale Voltage data unit selection can be set and
read. The voltage data unit value is
calculated as follows:
Unit = 0.1 [V] x 1/2
d
d: Voltage scale set value
Set a negative value as its 2’s
complement.
–15 to 15
(F1 to 0F
hex)
00 Yes Yes Byte
1C Time scale Time data unit selection can be set and
read. The time data unit value is calculated
as follows:
Unit = 0.1 [V] x 1/2
e
e: Voltage scale set value
Set a negative value as its 2’s
complement.
–15 to 15
(F1 to 0F
hex)
00 Yes Yes Byte
1D Reference From
Net
00: Operate at B1–01 setting.
01: Set B1–01 to “3” and operate with
CompoBus/D.
--- 00 Yes No Byte
Note 1. The Net Reference and Reference From Net functions are applicable for Inverter software
versions S1042 and later. Cannot be changed during running. Check the version with the In-
verter monitor function U1–14. If the software version is S1040, set b1–01 to “3.”
Note 2. Under the DeviceNet protocol, the unit for the speed reference is always r/min. The number of
motor poles (2 to 32) must be set in parameter o1–03 (frequency reference setting and dis-
play units) when using DeviceNet (open network).
Note 3. Cannot be changed during running.
D Communications Data Setting Examples
Example 1: Finding the communications data for outputting a frequency of 60 Hz with the following
conditions set.
Number of poles (o1–03): 4
Speed scale (attribute 16): 0
• Converting frequency to rotational speed:
Frequency x 120 / number of poles = 60 x 120/4 = 1,800 r/min
• Converting rotational speed to minimum unit:
Rotational speed / unit = 1,800 / (1 r/min x 1/2
0
) = 1,800
• Converting communications data to hexadecimal: 1,800 (dec) = 708 (hex)
Example 2: Finding the communications data for outputting a frequency of 60 Hz with the following
condition set.
Frequency setting (o1–03): 0 (Cannot be set with DeviceNet protocol.)
• Converting frequency to minimum setting unit:
Frequency / minimum unit = 60 / 0.01 = 6,000
• Converting communications data to hexadecimal: 6,000 (dec) = 1,770 (hex)
CompoBus/D Communications Card Operations Chapter 5