Sigma II User’s Manual Chapter 5: Parameter Settings and Functions
5-139
5 Improved Functions
5.11 Improved Functions (Applicable only to SGDH amplifiers of version
#33
or higher.)
5.11.1 Moment of Inertia Ratio Setting Range
A load with moment of inertia ratio (Pn103) more than the existing maximum value
10,000% may be connected to a direct-drive motor. Accordingly, the upper limit of
Pn103 is increased to 20,000%. (100% = 1:1)
5.11.2 Adaptation to Single-turn Data Absolute Encoder
A single-turn data absolute encoder is mounted to SGMCS servomotor as standard.
The machine configuration with a SGMCS servomotor does not require harmonic
gear, etc. so that the servomotor can be connected directly to a load. Therefore, for
its absolute value detecting system, the load-end absolute value can be obtained by
measuring only the angle of motor shaft.
In this case, the encoder multi-turn data is not required and no backup battery is
required.
(With a single-turn data absolute encoder, the multi-turn data is always set to"0")
Confirm the single-turn absolute encoder model in Motor Models Display (Fn011)
on the digital operator or panel operator:
FN011-E. □□■■ (Encoder Model/Encoder Resolution Display)
□□：Encoder model
00: Incremental encoder
01: Multiturn data absolute encoder
02: Single-turn data absolute encoder
■■：Encoder Resolution
13: 13 bits
16: 16 bits
17: 17 bits
20: 20 bits
Single-turn data absolute encoder
model
UTSB □ -B □□□□
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