Device
No.
Name Description
or User connection No.
CPU with built-in SCU: U0 to U2
CPU with built-in ET-LAN: U1 to U216
Serial Communication Unit (SCU): U1 to U4
SD42
-SD49
(Not used)
SD50-SD99
Device
No.
Name Description
SD50 Calendar timer (year)
● Saves year, month, day, hour, minute, second and day-of-the-week
data of the calendar timer as 16-bit binary data. The built-in calendar
timer will operate correctly through the year 2099 and support leap
years.
● The calendar timer can be set (time synch) by writing desired values
using the programming tool or a program based on calendar setting
instruction (TIMEWT).
SD51 Calendar timer (month)
SD52 Calendar timer (day)
SD53 Calendar timer (hours)
SD54 Calendar timer (minutes)
SD55 Calendar timer (seconds)
SD56
Calendar timer (day-of-
the-week)
SD60
Total ON number of error
alarm relays
Saves the total number of error alarm relays that are on. (Max. 4096
relays). By specifying SD60 in RST instruction, all data in the error
alarm buffer can be cleared.
SD61
No.1 error alarm relay that
turned on
Saves the number of the error alarm relay that turned on in the first
place (No.1). By specifying SD61 in RST instruction, all data in the error
alarm buffer can be cleared.
SD62
-SD79
No.2 to No.19 error alarm
relays that turned on
Saves the numbers of the error alarm relays that turned on. By
specifying the device number in RST instruction, all data of the relevant
relay(s) in the error alarm buffer can be cleared. Device numbers of
system data registers SDs and error alarm relays correspond as
follows.
Device No. Error alarm relay
SD62 No.2
SD63 No.3
SD64 No.4
SD65 No.5
SD66 No.6
SD67 No.7
SD68 No.8
SD69 No.9
SD70 No.10
SD71 No.11
SD72 No.12
SD73 No.13
SD74 No.14
20.2 List of System Data Registers
20-12 WUME-FP7CPUPGR-12
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