Mitsubishi Electronics Q68ADI ユーザーズマニュアル

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MELSEC-Q

3 SPECIFICATIONS

3.2.2 Maximum and minimum values hold function

(1) The maximum and minimum digital output values for each channel are stored in buffer

memory addresses 30 to 45 (Un\G30 to Un\G45).

(2) When the operating condition setting completed flag (X09) turns OFF, the values

are cleared to 0 and new maximum and minimum values are stored when

conversion begins.

(3) Since the area for storing the maximum and minimum values can be rewritten with

the sequence program, the maximum and minimum values within a specific period

of time can be checked.

3.3 I/O Signals for the PLC CPU

3.3.1 List of I/O signals

Table 3.3 shows a list of the I/O signals for the A/D converter modules.

Note that I/O numbers (X/Y) shown in this chapter and thereafter are the values when

the start I/O number for the A/D converter module is set to 0.

Table 3.3 List of I/O signal

Signal direction CPU A/D converter module

Signal direction CPU

A/D converter module

Device No. (Input)

Signal name

Device No. (Output)

Signal name

Module READY

Temperature drift compensation flag

Use prohibited

High resolution mode status flag

Operating condition setting request

Offset/gain setting mode flag

User range write request

Channel change completed flag

Channel change request

Use prohibited

Maximum value/minimum value reset

completed flag

Maximum value/minimum value reset

request

A/D conversion completed flag

Use prohibited

Error flag

Error clear request

POINT

1 These signals cannot be used by the user since they are for system use only.

If these are turned ON/OFF by the sequence program, the functioning of the

A/D converter module cannot be guaranteed.