Absolute rotary encoders identify every point in a movement through a unique digital signal. Due to their ability to assign an exact, unique position value to every linear and angular position, absolute rotary encoders have become one of the most important links between the mechanical system and the control system. The basic principle of an absolute rotary encoder is the optical sampling of a transparent code disc which is fixed with the driving shaft.
The absolute rotary Ø 58 mm encoder by Schneider Electric has a maximum resolution of 8 192 points per revolution. This encoder can detect up to 4 096 revolutions. Therefore the largest resulting resolution is 33 554 332 points (25 bit).
The integrated CAN interface of the absolute rotary encoder supports all the CANopen functions.
The following modes can be programmed and enabled or disabled:
- Polled mode
- Cyclic mode
- Sync mode
The protocol supports the programming of the following additional functions:
- Code sequence (complement)
- Resolution per revolution
- Total revolutions
- Preset value, two limit switches
- Bit-rate and node-ID
The connection cap ensures a simple assembly and addressing. It fulfils the function of a T-coupler and proposes M12 connectors for incoming and outgoing bus signals.
The rotary encoder can be powered through CAN network or by using the dedicated PG9 connection comfortably connectable with screw terminals. The device address is adjusted with rotary switches.
Additionally the connection cap offers direct diagnosis: operating mode, bus errors or incorrect wiring are shown by two LEDs on the rear side of the cap and provide a fast and simple error recognition.
The Osicoder absolute rotary Ø 58 mm encoders comprise:
- One M12 male connector (bus IN) and one M12 female connector (bus OUT) for connection of the CANopen bus
- One PG9 connection for to power cord
- Shaft of the encoder full shaft or blind shaft, depends on model)