KEYENCE DL-RB1A User Manual
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3-1
Data Processing and Operation Modes
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Time chart
(1) An external device inputs "ID No. 01" as the ID No. selection.
(2) After at least 2 ms have passed, DL-RB1A DRQ input from the external device turns on.
(3) Within 2 ms of the DRQ input turning on, DL-RB1A turns on the strobe output.
(4) The external device confirms that the strobe output is on and imports the DL-RB1A BCD
output.
(5) An external device the DL-RB1A DRQ input. (The strobe output and DL-RB1A BCD output
turn off within 2 ms.)
(6) An external device inputs "ID No. 02" as the ID No. selection.
(7) After at least 2 ms have passed, DL-RB1A DRQ input from the external device turns on.
(8) Within 2 ms of the DRQ input turning on, DL-RB1A turns on the strobe output.
(9) The external device confirms that the strobe output is on and imports the DL-RB1A BCD
output.
(10)An external device turns off the DL-RB1A DRQ input. (The strobe output and DL-RB1A
BCD output turn off within 2 ms.)
ID No.
selection input
(1) ID No. 01 selected
(6) ID No. 02 selected
DL-RB1A
DRQ input
(2) ON
OFF
(5) OFF
DL-RB1A
strobe output
(3) ON
OFF
OFF
DL-RB1A
DRQ input
(7) ON
OFF
(10) OFF
DL-RB1A
strobe output
(8) ON
OFF
OFF
DL-RB1A
BCD output
Data update
OFF*
OFF*
DL-RB1A
BCD output
Data update
OFF*
OFF*
2 ms min.
2 ms min.
2 ms min.
2 ms min.
2 ms max.
2 ms max.
2 ms max.
2ms max.
(4) ID No. 01 BCD data
(9) ID No. 02 BCD data
*BCD output (pin Nos. 6 to 31) and alarm output (pin No. 32) are all turned off, regardless of whether the
output logic is positive or negative.
A
A
A
B
B
B
A
A
A
A
A
B
B
B
B
B