Programmable absolute encoders for EtherNet/IP
30 April 2012
Sick UK has introduced a range of EtherNet/IP-compatible programmable absolute encoders – the AFS60 single-turn and AFM60 multi-turn products - offering diagnostic and monitoring capabilities for improved plant reliability and availability.
Designed for both precision applications and harsh industrial conditions, these encoders are the first to integrate DLR (Device Level Ring) technology for continuous monitoring of network integrity.
Network communications can be rebuilt seamlessly in the event of a cable break preventing downtime. Furthermore, the position of the break is reported, enabling remedial action to be taken quickly and efficiently at the next convenient opportunity.
The round loop capability of the AFM60 EtherNet/IP multi-turn encoder cuts programming and hardware costs for machine builders. Its rotary axis function enables the number of encoded rotations to be defined as a fraction - an important function for rotary applications such as turntables or power presses, which often have gearing between the encoder and rotating axis. This saves complicated PLC calculations and control programming, and so cuts costs during installation, maintenance and service.
- Temperature limits are user-programmable. When a Sick EtherNet/IP encoder reaches the defined maximum or minimum value, the encoder generates a message to the controller warning of a potentially critical state.
- Two operating hour counters: One starts when power is switched on, the other monitors actual shaft rotations. This information can be utilised to create preventative maintenance alerts relating to the mechanical components connected to the encoder.
- Each encoder has five dual colour LEDs that continuously show the current operating state of encoder functions and data transfer. Programmable position limit values can also be monitored to realise soft limit switches or programmable cam functions.
- In addition to position information, each encoder provides speed and acceleration feedback and has configurable limits. By monitoring these values, speed and acceleration sensitive components in the drive chain can be protected.
EtherCAT and ProfiNET variants will shortly be added to Sick’s AFM60 and AFS60 family of encoders.
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