AMNYTT amnytt.no 4/2022 - Page 85

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Ethernet-APL comparison to legacy technologies

Perceived complexity
Engineering Cost & Efforts
Operation efficiency & transparency
2nd channel access ( Monitoring + Optimization )
MRO Functionality / Performance
Ethernet-APL
One single network technology
Reduced engineering time per device
Flexible topology and redundancy
Seamless data access
Fully digital data transfer
Easy and fast access
Multiple communication channels
Remote diagnostic and configuration access
Fast device exchange
Fieldbus
Requires gateways and protocol conversion
Limited total cable length and participants of each bus segment
Data access with protocol conversion
Fully digital data transfer
Additional hardware
Low bandwidth
One message at a time ( half duplex )
Remote diagnostic and configuration access
Challenging fieldbus troubleshooting
4-20mA , optional HART
Current signal easy to understand
Extensive hazardous area calculation
AD / DA conversion leads to loss of accuracy
Limited data access
Additional hardware
Very low bandwidth
One message at a time ( half duplex )
Low diagnostic information
Troubleshooting at device
HART : Slow