Appendices; Appendix 1 Details Of I/O Signals; Appendix 1; Input Signal - Mitsubishi Electric MELSEC L Series User Manual

APPENDICES

Appendix 1

This section describes the details of I/O signals of D/A converter module for the CPU module.
The I/O number described in Appendix 1 shows the case that the start I/O number of the D/A converter module is set
to "0".
Appendix 1.1
(1) Module READY (X0)
Module READY (X0) turns ON to indicate that the preparation for the D/A conversion is completed after the
power-on or after the reset operation of the CPU module. In the following cases, Module READY (X0) turns off.
• In the offset/gain setting mode (In this case, the D/A conversion processing is executed).
• When a watch dog timer error occurs to the D/A converter module (In this case, the D/A conversion
processing is not executed).
(2) External power supply READY flag (X7)
(a) When the external power supply is off, or when the time after the supply is less than
100ms
External power supply READY flag (X7) remains off, and the D/A conversion processing is not executed. The
analog output value becomes 0V/0mA.
(b) When the external power supply is turned off and on
External power supply READY flag (X7) turns on after 100ms. The D/A conversion processing is started on the
channels where the conversion is enabled.
In normal mode: Module READY (X0)
In offset/gain setting mode: Offset/gain setting
External power supply READY flag (X7)
Details of I/O Signals

Input signal

Common
ON
CPU module power
mode flag (XA)
External power supply
Common
ON
ON
100ms
ON
D/A conversion is D/A conversion is
not performed. performed.
APPX
A
OFF
OFF
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