CONTREX CX-1200 - Manual (Page 205)

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DIGITAL I/O P1/1
DI 1 Shot
Use the Digital Input 1 Shot (CP-402) to create a one scan pulse (one-shot) as the result of a high-to-low (open-to-
closed) transition on any or all of the PLC dedicated inputs. To generate a 1-scan pulse for an inactive high to an
active low transition, enter a “1” in the bit location of corresponding digital input. In the example below, the “1”
has been entered in digital input 14.
DI 7..0
Digital Input 7..0 (MP-100) displays the value of the “J6” digital inputs. A ‘1’ in the bit location indicates a “low
voltage” condition on the corresponding input (which is consistent with a contact closure to common). Refer to
Appendices: Appendix C for the DI 7..0 (MP-100) bit map list.
DI 15..8
Digital Input 15..8 (MP-101) displays the value of the “J7” digital inputs. A ‘1’ in the bit location indicates a “low
voltage” condition on the corresponding input (which is consistent with a contact closure to common). These eight
inputs can be set up in the PLC Programming screen to generate a One-Shot Pulse on a high-to-low transition.
Refer to Appendices: Appendix C for the DI 15..8 (MP-101) bit map list.
DO 7..0
Digital Output 7..0 (MP-102) displays the value of the “J2” digital outputs. A ‘1’ in the bit location indicates an active
“low voltage” condition on the corresponding open collector output (which would sink DC current). Refer to
Appendices: Appendix C for the DO 7..0 (MP-102) bit map list.