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APPX
Appendix 2 I/O Signals
Details of input signals
The following describes the details of the input signals for the A/D converter module which are assigned to the CPU module.
The I/O numbers (X/Y) described in Appendix 2 are for the case when the start I/O number of the A/D converter module is set
to 0.
This section describes buffer memory addresses for CH1.
For details on the buffer memory addresses after CH2, refer to the following.
Page 125 List of buffer memory addresses
Module READY
'Module READY' (X0) turns on to indicate the preparation for the A/D 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 A/D conversion is performed.)
• When a watchdog timer error occurs in the A/D converter module (In this case, the A/D conversion is not performed.)
■Device number
The following shows the device number of this input signal.
Alert output signal
'Alert output signal' (X8) turns on when the process alarm or rate alarm has been detected. When the alert output function is
disabled for all channels, 'Alert output signal' (X8) always turns off.
■Device number
The following shows the device number of this input signal.
■Process alarm
• 'Alert output signal' (X8) turns on when digital operation values of the A/D conversion enabled channels exceed the ranges
set for 'CH1 Process alarm upper upper limit value' (Un\G514) to 'CH1 Process alarm lower lower limit value' (Un\G520)
after 'CH1 Alert output setting (process alarm)' (Un\G512) is enabled. The ALM LED also turns on along with the on of the
signal.
• Alert output signal (X8) turns off when the digital operation values fall within the setting range for all the A/D conversion
enabled channels. The ALM LED also turns off along with the off of the signal.
Signal name CH1 to CH16
Module READY X0
Signal name CH1 to CH16
Alert output signal X8
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