Communication abnormality detecting/coping device and vacuum pump remote monitor control device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 20, 2001
Grant Date -
N/A
app pub date -
Mar 29, 2000
filing date -
Mar 30, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A communication abnormality detecting/coping device and a vacuum pump remote monitor control device are provided, which are capable of detecting the presence/absence of an abnormality in data communication and reducing an influence of the abnormality on a system device when detecting the abnormality. An operation acknowledge message 51 is transmitted to a system device (30) from a turbo-molecular pump control device (20) in Step 1. A reply message (53) indicative of the reception of the operation acknowledgement message 51 by the system device (30) is transmitted to the turbo-molecular pump control device (20) in Step 3. In Step 5, an elapsed period of from a time at which the operation acknowledgement message (51) is transmitted to a time at which a reply message (53) is received is measured, and if the elapsed period exceeds the preset period, the abnormality in the communication system is warned in Step 6.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully