Mitsubishi Electronics Q64AD, Q68ADI Maximum and minimum values hold function, List of I/O signal

3 SPECIFICATIONS

3.2.2 Maximum and minimum values hold function

MELSEC-Q

(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.

3.3I/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
X0	Module READY		Y0
X1	Temperature drift compensation flag		Y1
X2			Y2
X3			Y3
X4			Y4	Use prohibited	1
X5	Use prohibited	1	Y5
X6			Y6
X7			Y7
X8			Y8
X9	High resolution mode status flag		Y9	Operating condition setting request
XA	Offset/gain setting mode flag		YA	User range write request
XB	Channel change completed flag		YB	Channel change request
XC	Use prohibited	1	YC	Use prohibited	1
XD	Maximum value/minimum value reset		YD	Maximum value/minimum value reset
	completed flag			request
XE	A/D conversion completed flag		YE	Use prohibited	1
XF	Error flag		YF	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.

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