5SHX1445H0001 3BHL00391P0101 3BHB003230R0101 5SXE05-0152 Safety is of the first importance. Even if the programmable controller malfunctions when the power supply from the outside is abnormal, the whole system can work in a safe state. the following safety circuits should be set up outside the programmable controller: emergency The following safety circuits should be installed outside the programmable controller: an emergency stop circuit, a protection circuit, an interlocking circuit for reverse operation such as forward reversal, and an interlocking circuit to prevent damage to the upper/lower limit of positioning to prevent malfunctions caused by misoperation.

5SHX1445H0001 3BHL00391P0101 3BHB003230R0101 5SXE05-0152 Programming should be theory to practice. Start from the simplest, step by step. For example, learning Siemens plc programming can be written at the beginning of some only include digital, and then consider analogue, in addition to timers, counters are often used. You cannot have the same two outputs in a programme. For example, if 1 output q0.0 exists in the previous programme, it should not be followed by another one, unless it is a sub-function, and it should be ensured that the outputs in the main function and sub-function should not be duplicated as well, otherwise plc will only consider the latter.

5SHX1445H0001 3BHL00391P0101 3BHB003230R0101 5SXE05-0152 In the choice of programming language, whether to program with ladder diagrams or with statement tables or using function diagrams depends on the following points:

(1) Some plc using ladder diagram programming is not very convenient (such as writing is not convenient), then available statement table programming, but the ladder diagram is always more intuitive than the statement table.

(2) Experienced personnel can use 5SHX1445H0001 3BHL00391P0101 3BHB003230R0101 5SXE05-0152 statement table to program directly, just like using assembly language.

(3) In the case of clear single-sequence, selective-sequence or concurrent-sequence control tasks, it is preferable to program the program using a function diagram.