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Omron NT31

Omron NT31
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565
Outline of Communications
Section 9-3
S Operation When Using Instructions
The flow of communications between the host and the NT31/NT31C follows one
of the three patterns indicated below, depending on the types of command and
the settings made for “response” with the memory switches (see page 181).
- Pattern with write command when “No” is set for the response
Command transmission
[Operation at host]
Data write command
[Operation at NT31/31C]
Command processing
However, when an error occurs, an error response is returned.
- Pattern with data read command, re--send command, and data write com-
mand when response ”Yes” is set.
[Operation at host]
Data write command
Command transmission
Command reception
Command processing
Response transmission
Command/response
reception
Response or re-send command
[Operation at NT31/31C]
Sometimes multiple responses may be received for one command.
- Pattern when the operation at the NT31/NT31C is notified to the host.
[Operation at host] [Operation at NT31/31C]
Notification reception
Notify Command
Notify Command
Transmission

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