With the growing interest in the use of SEMI EDA/Interface A standards, we have been getting a great deal of requests for the difference between Interface A and SECS/GEM.
For a quick comparison, here is a table to showing some of the differences between Interface A and SECS/GEM:
|
EDA/Interface A |
SECS/GEM |
|
|
Clients |
Multiple |
Single |
|
Security |
Can be configured for SSL-secured communications |
HSMS is not secure |
|
Equipment Model |
You can upload a description of the logical structure of the equipment which includes parameters, events, and exceptions assigned to modules, subsystems, and I/O devices |
Equipment information is found in a manual provided with the equipment, but often without the necessary context |
|
Traces |
Start & stop triggers that may include one or more events and/or exceptions | Traces begin via a SECS message and end when a specified number of samples are collected |
|
Event Reports |
Specify an event and an optional set of parameters to be collected when that event occurs |
GEM host defines collections of parameters called reports, then links one or more reports to one or more events. The same report may be linked to multiple events if needed. |
|
Data Collection Reports |
E134 allows data collection to be throttled if data collection is reducing equipment performance below a specified level |
GEM does not throttle back data collection |
Additional Resources:
