Omron FQM1-MMA21, FQM1-CM001 Absolute Present Value Preset, Absolute Offset Preset, 7FFF

Functions for Servo Drivers Compatible with Absolute Encoders Section 7-7

Ps: Absolute offset

7FFF

Absolute encoder's position

Absolute Present Value

0

Ps

Reference position (Absolute offset position)

P0

Note With an absolute circular counter, the absolute number of rotations present value (A604/A605) is not used; only the initial incremental pulses are used. The initial incremental pulses are the data of an amount treated as the angle from an origin.

7-7-7 Absolute Present Value Preset

The absolute encoder's state (absolute number of rotations PV (in A604 and A605) and the number of initial incremental pulses (in A600 and A601)) can be reflected in high-speed counter present value 1 (A600 and A601). This function is enabled by turning ON the Absolute Present Value Preset Bit (A610.06). The absolute present value is stored in High-speedCounter Present Value 1 (A600 and A601). Additionally, absolute present values vary depending on the counter operation. See 7-7-6 Absolute Present Value for details.

7-7-8 Absolute Offset Preset

The present value to be defined as an origin is obtained from the absolute number of rotations present value (A604 and A605) at the time and the num- ber of initial incremental pulses. The value can be stored in the absolute offset (System Setup parameter). The value read from an absolute encoder at the time is defined as a machine (application) origin. This function is executed by turning ON the Absolute Offset Preset Bit (A610.05).

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