Omron CP - PROGRAMMING MANUAL 05-2007 Programming Manual page 251

Comparison Instructions
218
Example:
When C = 39 hex, the rightmost 6 bits are 111001 (year=1, month=1, day=1,
hours=0, minutes=0, and seconds=1) so only the hours and minutes are com-
pared. This mask setting can be used to perform a particular operation at a
given time (hour and minute) each day.
Present time data
15 08 07
Minute (00 to Second (00 to
S
1
59, BCD) 59, BCD)
Day of month Hour (00 to
S +1
1
23, BCD)
(01 to 31, BCD)
Year (00 to Month (01 to
S +2
1
99, BCD) 12, BCD)
Compares only hours and
minutes data.
Previous data comparison instructions compared data in 16-bit units. The
time comparison instructions are limited to comparing 8-bit time values.
The following table shows the structure of the CPU Unit's internal Calendar/
Clock Area.
Addresses
A351.00 to A351.07 Second (00 to 59, BCD)
A351.08 to A351.15 Minute (00 to 59, BCD)
A352.00 to A352.07 Hour (00 to 23, BCD)
A352.08 to A352.15 Day of month (01 to 31, BCD)
A353.00 to A353.07 Month (01 to 12, BCD)
A353.08 to A353.15 Year (00 to 99, BCD)
The Calendar/Clock Area can be set with the CX-Programmer, DATE(735)
instruction, or "CLOCK WRITE" FINS command (0702 hex).
Summary of Time Comparison Instructions
The following table shows the function codes, mnemonics, names, and func-
tions of the 18 time comparison instructions.
Code Mnemonic
341 LD= DT LOAD EQUAL
AND=DT AND EQUAL
OR=DT OR EQUAL
342 LD<>DT LOAD NOT EQUAL
AND<>DT AND NOT EQUAL
OR<>DT OR NOT EQUAL
343 LD<DT LOAD LESS THAN
AND<DT AND LESS THAN
OR<DT OR LESS THAN
344 LD<=DT LOAD LESS THAN OR EQUAL
AND<=DT AND LESS THAN OR EQUAL
OR<=DT OR LESS THAN OR EQUAL
345 LD>DT LOAD GREATER THAN
AND>DT AND GREATER THAN
OR>DT OR GREATER THAN
Comparison time data
00 15 08 07
Minute (00 to Second (00 to
S
2
59, BCD) 59, BCD)
Day of month Hour (00 to
S +1
2
(01 to 31, BCD) 23, BCD)
Year (00 to Month (01 to
S +2
2
99, BCD) 12, BCD)
Year, month, day, and seconds
data is masked.
Contents
Name
Section 3-6
00
Function
True if
S1 = S2
True if
S1 S2
True if
S1 < S2
True if
S1 S2
True if
S1 > S2