Hioki 3511-50, Instruction Manual, Page: 76 / 140

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6.2 Connecting Method
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6.2.1 Handshake
85 %
25 %
Buffer empty
Amount of input
buffer used
CA(RTS) ON
OFF
Buffer flow control
(1) Controls when receiving
When the receiving buffer is more than 85 % full, CA (RTS) is set to OFF
to indicate to the controller that the empty buffer capacity is low.
Processing of data in the buffer continues, and when the receiving buffer is
less than 25 % full, CA (RTS) is set to ON to indicate to the controller that
there is ample buffer capacity.
(2) Controlls when transmitting
When CB (CTS) is found to be OFF, transmission is suspended; it is found
to be ON transmission resumes.