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(1) Buffer memory areas for error occurrence data
Ex.
Pointer No.
Item
184
Md.16
15
180
181
182
183
14
176
177
178
179
13
172
173
174
175
12
168
169
170
171
11
164
165
166
167
10
160
161
162
163
9
156
157
158
159
8
152
153
154
155
7
148
149
150
151
6
144
145
146
147
5
140
141
142
143
4
136
137
138
139
3
132
133
134
135
2
128
129
130
131
1
124
125
126
127
Error history pointer
Stores the pointer number that is next to the one for
the latest error history record.
Buffer memory
address
A set of buffer memory data is organized as an error history record
with a pointer number.
Pointer No.0 = Buffer memory addresses 120 to 123
Pointer No.1 = Buffer memory addresses 124 to 127
Pointer No.2 = Buffer memory addresses 128 to 131
Pointer No.15 = Buffer memory addresses 180 to 183
Error history records are stored from the pointer No.1 up to No.15.
After 16 records are stored, the next record will be assigned the pointer No.0.
(The new record replaces the older record.)
Pointer No. 0
Error history
120
Md.12
Error code
121
Md.13
Error occurrence
(Year: Month)
122
Md.14
Error occurrence
(Day: Hour)
123
Md.15
Error occurrence
(Minute: Second)