发明名称 |
A/D converter and programmable controller system |
摘要 |
An A/D converter that is attached to a programmable controller (PLC) and sequentially converts an analog value inputted from outside into a digital value. The A/D converter includes: a shared memory that can read-access from a CPU unit that controls the entire PLC and includes a log storage area with a ring buffer configuration for sequentially logging the digital value and a parameter storage area for storing a head pointer serving as a parameter indicating a position where a next log data is stored; and a logging executing unit that writes a digital value in an address indicated by the head pointer in the log storage area as log data and updates the head pointer.
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申请公布号 |
US8543744(B2) |
申请公布日期 |
2013.09.24 |
申请号 |
US200913202507 |
申请日期 |
2009.03.23 |
申请人 |
ONISHI ATSUKO;KUBOTA YOSHIYUKI;UKENA SATORU;TAKASE SHIGEAKI;MITSUBISHI ELECTRIC CORPORATION |
发明人 |
ONISHI ATSUKO;KUBOTA YOSHIYUKI;UKENA SATORU;TAKASE SHIGEAKI |
分类号 |
G06F3/00;G06F13/00 |
主分类号 |
G06F3/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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