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APPX
Appendix 3 Buffer Memory
Details of buffer memory addresses
This section describes the details of buffer memory addresses of the I/O module with diagnostic functions.
Latest address of error history
This area shows the buffer memory address where the latest error history is stored.
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Buffer memory address
The following table shows the buffer memory address of this area.
Error history No.
Up to 16 errors that have occurred in the module are registered.
Ex.
For Error history No.1
*1 The value stored when the input response time setting error (error code: 1900H) occurs at 12:34:56.789 on Friday, May 27, 2016
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Buffer memory address
The following table shows the buffer memory address of this area.
Buffer memory name
X/Y0 to X/YF
Latest address of error history
0
Item
Description
Example
Error code
The error code is stored.
1900H
First/Last two digits of the year
The error time is stored in the BCD code.
2016H
Month/Day
527H
Hour/Minute
1234H
Second
56H
Day of the week
The following values are stored in the BCD code for each day of the week.
Sunday: 0, Monday: 1, Tuesday: 2, Wednesday: 3
Thursday: 4, Friday: 5, Saturday: 6
5H
Millisecond (upper)
The error time is stored in the BCD code.
7H
Millisecond (lower)
89H
System area
Buffer memory name
Error history No.1 to Error history No.16
Error history No.
16 to 143
b15
b8 b7
b0
…
Error code
First two digits of the year
Last two digits of the year
Month
Day
Hour
Minute
Second
Day of the week
Millisecond (higher-order digits)
Millisecond (lower-order digits)
Un\G16
Un\G20
Un\G19
Un\G18
Un\G17
Un\G21
Un\G22
Un\G23
to
to
System area
Summary of Contents for MELSEC iQ-RX40NC6B
Page 1: ...MELSEC iQ R I O Module With Diagnostic Functions User s Manual Application RX40NC6B RY40PT5B ...
Page 2: ......
Page 125: ...4 OVERVIEW 123 4 MEMO ...
Page 191: ...12 MAINTENANCE AND INSPECTION 189 12 MEMO ...
Page 227: ......