301
Comparison Instructions Section 3-7
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.
The Calendar/Clock Area can be set with a Programming Device (including a
Programming Console), 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.
Addresses Contents
A35100 to A35107 Second (00 to 59, BCD)
A35108 to A35115 Minute (00 to 59, BCD)
A35200 to A35207 Hour (00 to 23, BCD)
A35208 to A35215 Day of month (01 to 31, BCD)
A35300 to A35307 Month (01 to 12, BCD)
A35308 to A35315 Year (00 to 99, BCD)
Code Mnemonic Name Function
341 LD= DT LOAD EQUAL True if
S1 = S2
AND=DT AND EQUAL
OR=DT OR EQUAL
342 LD<>DT LOAD NOT EQUAL True if
S1 ≠ S2
AND<>DT AND NOT EQUAL
OR<>DT OR NOT EQUAL
343 LD<DT LOAD LESS THAN True if
S1 < S2
AND<DT AND LESS THAN
OR<DT OR LESS THAN
344 LD<=DT LOAD LESS THAN OR EQUAL True if
S1 ≤ S2
AND<=DT AND LESS THAN OR EQUAL
OR<=DT OR LESS THAN OR EQUAL
345 LD>DT LOAD GREATER THAN True if
S1 > S2
AND>DT AND GREATER THAN
OR>DT OR GREATER THAN
346 LD>=DT LOAD GREATER THAN OR EQUAL True if
S1 ≥ S2
AND>=DT AND GREATER THAN OR EQUAL
OR>=DT OR GREATER THAN OR EQUAL
00070815
S
1
S1+1
S
1+2
00070815
S
2
S2+1
S
2+2
Present time data Comparison time data
Compares only hours and
minutes data.
Year, month, day, and seconds
data is masked.
Second (00 to
59, BCD)
Second (00 to
59, BCD)
Minute (00 to
59, BCD)
Minute (00 to
59, BCD)
Hour (00 to
23, BCD)
Hour (00 to
23, BCD)
Day of month
(01 to 31, BCD)
Day of month
(01 to 31, BCD)
Month (01 to
12, BCD)
Month (01 to
12, BCD)
Year (00 to
99, BCD)
Year (00 to
99, BCD)
To Next Page
Loading...
