Calendar Function - Delta C2000 Plus Series User Manual

Chapter 16 PLC Function ApplicationsC2000 Plus

16-13 Calendar function

The C2000 Plus's internal PLC includes calendar functions, but these may only be used when a
keypad (KPC-CC01) is connected, otherwise the function cannot be used. Currently-supported commands
include TCMP (comparison of calendar data), TZCP (calendar data range comparison), TADD (calendar
data addition), TSUB (calendar data subtraction), and TRD (calendar reading). Please refer to the
explanation of relevant commands and functions for the usage of these commands.
In real applications, the internal PLC can judge whether calendar function have been activated; if they
have been activated, calendar warning codes may be displayed in some situations. The basis for whether
a calendar function has been activated is whether the program has written the calendar time (D1063 to
D1069) in connection with the foregoing calendar commands or programs.
The calendar's time display is currently assigned to D1063 to D1069, and is defined as follows:
Calendar-related special M items are defined as follows:
NOTE:
1. When a program writes to the commands TCMP, TZCP, TADD, or TSUB, if it is discovered that a
value exceeds the reasonable range, M1026 will be 1.
2. When the keypad display is PLra (RTC correction warning) or PLrt (RTC time out warning),
M1076 will be ON.
3. When M1036 is 1, the PLC will ignore the calendar warning.
Calendar trigger warning code is defined as follows:
Warning
PLra Calendar time correction
PLrt Calendar time refresh time out Requires power restart
NOTE:
1. When the PLC's calendar functions are operating, if the keypad is replaced with another keypad,
it will jump to PLra.
2. When it is discovered at startup that the keypad has not been powered for more than 7 days, or
the time is wrong, PLra will be triggered.
3. When it is discovered that the C2000 Plus has no keypad in 10 sec. after startup, PLrt will be
triggered.
Special D Item
Year
D1063
(Western)
D1064 Weeks
D1065 Month
D1066 Day
D1067 Hour
D1068 Minute
D1069 Second
Special D
M1068 Calendar time error
Calendar time error or refresh time
M1076
out
M1036 Ignore calendar warning
Description
Requires power restart
Content
20xx (2000–2099)
1–7
1–12
1–31
0–23
0–59
0–59
Item
Reset approach Whether it affects PLC operation
16-166
Attributes
RO
RO
RO
RO
RO
RO
RO
Attributes
RO
RO
RW
Will not have any effect
Will not have any effect