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3.4 Buffer Memory Assignment
3.4.1 List of buffer memory assignment
3
SPECIFICATIONS
3.4
Buffer Memory Assignment
3.4.1
List of buffer memory assignment
The following table shows the buffer memory assignment of the QD63P6.
* 1 FInitial value which is set when the programmable controller CPU is powered ON or reset.
POINT
• The reserved areas in the above table and areas not mentioned in the
table are for system use, not for users. If written by a user, the functions
of the QD63P6 are not ensured.
• All data in the buffer memory of the QD63P6 are initialized when the
programmable controller CPU is powered ON or reset. To save
necessary data, use the FROM/DFRO/TO/DTO instructions in the
sequence program or make setting with the utility package for writing/
reading the buffer memory data.
Table 3.7 List of buffer memory assignment
Address (decimal notation)
Setting contents
Initial
value
*1
Read/write
CH1 CH2 CH3 CH4 CH5 CH6
0
30
60
90
120
150
Ring counter lower limit value *2
(L)
0
Read/write are enabled.
1
31
61
91
121
151
(H)
2
32
62
92
122
152
Ring counter upper limit value *2
(L)
3
33
63
93
123
153
(H)
4
34
64
94
124
154
Preset value setting *2
(L)
5
35
65
95
125
155
(H)
6
36
66
96
126
156
Coincidence detection point setting *2
(L)
7
37
67
97
127
157
(H)
8
38
68
98
128
158 Coincidence detection point change request
9
39
69
99
129
159 Period setting
10
40
70
100
130
160
Present value A *2
(L)
Read only
11
41
71
101
131
161
(H)
12
42
72
102
132
162 Overflow detection flag
13
43
73
103
133
163 Periodic counter flag
14
44
74
104
134
164
Previous periodic pulse count value *2
(L)
15
45
75
105
135
165
(H)
16
46
76
106
136
166
Present periodic pulse count value *2
(L)
17
47
77
107
137
167
(H)
18
48
78
108
138
168 Judgment value for updated periodic
pulse count value *2
(L)
19
49
79
109
139
169
(H)
20
50
80
110
140
170 Error code
21
51
81
111
141
171 Error reset command
Read/write are enabled.
22
52
82
112
142
172
Reserved
-
-
to
to
to
to
to
to
29
59
89
119
149
179
200
202
204
206
208
210
Present value B *2
(L)
0
Read only
201
203
205
207
209
211
(H)