KEYENCE N-410 - Manual (Page 76)

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Multi-drop Link Mode
Controlling Multi-drop Link Mode
Multi-drop link mode allows one host computer to control up to 31 BL/SR/RF Series devices.
To allow the N-410 to control communication with each BL/SR/RF Series device, the host
computer should be set up to communicate only with the N-410. This uses a very simple
program (The BL/SR/RF Series device that sent each packet of data is identified by an ID
number appended to the head of the packet). The system can thus be constructed so that load
on the host computer is extremely low.
The N410 can be used to control the host computer in three different ways.
• Data communication. . . . . . . . . . . . . . . . . . . . . . . . . . Sends read data to the host computer.
• BL/SR/RF Series command communication . . . . . . . Allows commands to be sent to BL/SR/RF
Series devices.
• N-410 command communication . . . . . . . . . . . . . . . . Controls the N-410 directly and allows N-410
settings to be changed.
When using the multi-drop link mode, the maximum number of characters
(number of data digits) that can be handled in a single communication is 992
(including additional data). Be careful with the number of data digits when
sending or receiving large size data such as an IC tag or 2D code.
The following pages explain these settings.
Caution