Mitsubishi Electric MELSEC iQ-R Series User Manual page 220

Current error area (Un\G140 to 149)
The latest code of an error occurring can be checked.
Buffer memory name
Error code
Time
■Error code (Un\G140)
An error code is stored.
■Time (Un\G142 to 149)
The time when an error occurred is stored as a BCD code.
b15
Un\G142
Month (01H to 12H)
Un\G143
Un\G144 Hour (00H to 23H)
Un\G145 Second (00H to 59H)
Un\G146 Year (00H to 99H) first 2 digits
Un\G147 Lower milliseconds (00H to 99H)
*1 Time zone and summer time flag details are as follows:
b15
System area
6 RECORDER MODULE (DETAILED SPECIFICATIONS)
218
6.4 Buffer Memory
Address
Un\G140
Un\G142
Un\G143
Un\G144
Un\G145
Un\G146
Un\G147
b8 b7
System area Time zone and summer time flag
Year (00H to 99H) last 2 digits
Upper milliseconds (00H to 09H)
b8 b7
Description
The latest error code is stored.
b0 to 7: Time zone and summer time flag
b8 to 15: System area
b0 to 7: Last two digits of the year
b8 to 15: Month (01 to 12)
b0 to 7: Day (01 to 31)
b8 to 15: Hour (00 to 23)
b0 to 7: Minute (00 to 59)
b8 to 15: Second (00 to 59)
b0 to 7: Day of the week (0: Sun, 1: Mon, 2: Tue, 3: Wed, 4: Thu, 5: Fri, 6:
Sat)
b8 to 15: First two digits of the year
b0 to 7: First two digits of the millisecond
b8 to 15: Last two digits of the millisecond
b0
*1
Day (01H to 31H)
Minute (00H to 59H)
Day of the week (0H to 6H)
b1 b0
Summer time flag
OFF: Except during summer time
ON: During summer time
Time zone
50H to 34H: -12 to +13 hours (Unit: 15 minutes)