Chapter 6 Applied Instructions
6-365
API Instruction code Operand
Function
1601 TWR P
S
Writing the time
Device
X Y M S T C HC D L SM SR E PR K 16# “$” DF
Pulse instruction
16-bit instruction (3 steps)
32-bit instruction
AH500 AH500 -
Symbol:
S
Data source Word
Explanation:
1. S: The device into which the setting value is written
2. The operand S occupies seven consecutive devices.
3. When users want to adjust the built-in real-time clock in the CPU module, they can use the
instruction to write the correct current time into the built-in real-time clock.
4. When the instruction is executed, the new setting time is instantly written into the real-time
clock in the PLC. Therefore, when the instruction is executed, users have to make sure that
the new setting time is consistent with the time when the new setting time is written into the
real-time clock.
Example:
When M0 is ON, the correct current time is written into the built-in real-time clock in the PLC.
register
Item Value
register
Item
New setting time
Real time clock
Additional remark:
1. If the value in S exceeds the range, the operation error occurs, the instruction is not executed,
SM is ON, and the error code in SR is 16#2003.
2. If S+6 exceeds the device range, the operation error occurs, the instruction is not executed,
SM is ON, and the error code in SR is 16#2003.
3. If users declare the operand S in ISPSoft, the data type will be ARRAY [7] of WORD/INT.
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