Explanation Of Real-Time Clock Instructions - Delta AH500 Programming Manual

6.17.2 Explanation of Real-time Clock Instructions

API Instruction code
1600 TRD
Device X Y M
 
D
Symbol:
Explanation:
1. D: The device in which the current time is stored
2. The operand D occupies seven consecutive devices.
3. The built-in real-time clock in the CPU module provides the data relating to the year, the week,
the moth, the day, the minute, and the second. The data is stored in SR391~SR397. The
instruction TRD is used to read the current time into the seven registers.
4. The last two digits of the year number for A.D. are stored in SR391.
Example:
When M0 is ON, the current time is read from the real-time clock into D0~D6. The value 1 in SR397
represents Monday, the value 2 represents Tuesday, and by analogy, the value 7 represents
Sunday.
Special data
Item
register
SR391 Year (A.D.)
SR392 Month
SR393 Day
SR394 Hour
SR395 Minute
SR396 Second
SR397 Week
Additional remark:
1. If D+6 exceeds the device range, the instruction is not executed, SM0 is ON, and the error
code in SR0 is 16#2003.
When SM220 is ON, the real-time clock is calibrated within ±30 seconds. If the value of the
2.
second in the real-time clock is within the range between 0 and 29, the value of the second is
cleared to zero. If the value of the second in the real-time clock is within the range between 30
Operand
P D
S T C HC D
  
Pulse instruction 16-bit instruction (3 steps) 32-bit instruction
AH500
Device in which the result is
D ：
stored
General data
Value
00~99
1~12
1~31
0~23
0~59
0~59
1~7
C ha pt er 6 A p pl i e d In s tr uc t io ns
L SM SR E PR
  
AH500
Word
Item
register
D0 Year (A.D.)
D1 Month
D2 Day
D3 Hour
D4 Minute
D5 Second
D6 Week
Function
Reading the time
K 16# "$" DF

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