1. TWR (Time Write) command
Instructions to write time presets to the built-in real-time clock: Clock information is written to the TWR (Time Write) command. The sequence number of the action instruction is FNC167, [S ·] T, C and D can be used, and only 16-bit operations can be used, accounting for 5 program steps.
The function of this command is to write the time preset value to the built-in real-time clock, and the written information is put to [S ·] in advance. In the initial 7 modules, when the command is executed, the built-in real-time clock is immediately changed to apply a new time.
2. TRD(FNC166) TRD(P) instruction
TRD(FNC166) TRD(P) instructions are 16-bit operations and occupy 7 program steps. T, C and D are available.
The purpose of this instruction is to read the information from the built-in instant clock and put it into the preliminary 7 words by [D.].
The time loading instruction, i.e., loading from the system software together with the data register, and the system software together with the data register for the real-time clock, is D8013-D8019, in which the time, date, hour, minute, second and its worship are matched.
Time writing instruction, that is, according to the PLC, the information of the people's calibration is written into the system software together with the register, and the TWR instruction is applied.
Calibrate the clock
Usually the internal clock of the new PLC is wrong, and it is necessary for people to upgrade to the Internet clock, which can be changed according to the program anytime and anywhere.
Another way
After communicating with the PLC connection on the computer, click the "Online" button in the status bar and select the clock setting.
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