KEYENCE N-400 - Manual (Page 76)

Chapter 4 Multi-Drop Link Mode Control Procedure
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• When the command format is [Command] [CR], the response format is [Re-
sponse] [CR]. When the command format is [STX][Command][ETX], the
response format is [STX][Response][ETX].
* [LF] can be added to the end of the command. However, [LF] is not added to
the response.
* When [ESC] is added to the head of the command, the N-400’s receiving buffer
is cleared. However, [ESC] is not added to the response.
Example: Sending “LON” to start reading the BL series with ID No. 5
Command being sent:
Response:
Command being sent:
Response:
Note: When the reading rate check mode (TEST1) start command is sent to the BL
series, the data is stored in the BL series’ buffer, causing the buffer overflow error,
unless auto polling is performed.
Even if auto polling is performed, the buffer overflow error may occur because the
polling interval is longer than the BL series’ reading interval when many BL series
are connected. In this case, send the “Specific ID polling ON” command to the N-
400 (
➮ see p. 72) to control the N-400 directly so that auto polling is performed only
for the BL series to be tested.
After using the specific ID polling mode, be sure to reset this command.
Command Response
Command CR Response CR
STX Command ETX STX Response ETX
% T 05 – LON CR
% T 05 – OK CR
ESC STX % T 05 – LON ETX
STX % T 05 – OK ETX