Siemens plc programming instructions v1490.1

V1490.1 in the S7-200 represents a data bit that is part of VB1490 or VW1490 or VD1490.
Equivalent to DB1.DBX1490.1 in S7-300

How does Siemens PLC display symbol information below the block?

Options→Customize→LAD/FBD tab→Uncheck “Show symbol information at address”.

Siemens PLC programming I_DI, DI_R, DIV_R, CTCH, MUL_R, ROUND

I_DI, integer (INT) to double integer (DINT)

DI_R, double integer (DINT) to floating point number (real number REAL)

DIV_R, floating point number (REAL) division

CTCH, this instruction was not found;

MUL_R, floating point number (REAL) multiplication

ROUND, floating point number (REAL) rounded to double integer (DINT)

I, INT, (single) integer;

DI, ie DINT, double integer;

R, ie REAL, floating point number;

Generally there are four operators (add ADD, subtract SUB, multiply MUL, except DIV) and add “_I”, which is to operate on integers; add “_DI”, which is to calculate double integers; add “_R”, which is floating The number of points is calculated.

How to use CP243-iBUS

ETH-iBUS Ethernet Converter Instructions 1. ETH-iBUS is a convenient product that can be used without any work in the S7-200PLC. 2. ETH-iBUS can be directly connected to WinCC [selected driver is TCP/IP (auto) - Siemens comes with] without using PC ACCESS [OPC mode], high communication reliability 3. Q, I, M, DB1 in WinCC (remember: DB1) corresponds to Q, I, M, V in the S7-200 PLC. 4. ETH-iBUS can also be directly connected to MicorWin 4.0 to program the S7-200 PLC, download the program, and debug online. 5. ETH-iBUS requires an external 24V power supply. 6. There are 2 TCP/IP channels (Note: Only two upper computers can be serviced. WinCC and MicroWin 4.0 can be run simultaneously in the same upper computer; in theory, up to six upper computers can be connected, but we have not yet Tested this situation) 7. Configuration plan: a. Line type: that is, a PLC (s7-200) and a host computer (computer), directly connected by a crossover cable (RJ45 network cable). (Note: NICs with cross fun…

Power failure delay type time relay physical wiring diagram

It is mainly used on equipment that needs to be stopped for a certain period of time after power failure. In many cases, it is necessary to use a power-off delay type relay for control. For example, it is necessary to control a motor, and it is required to restart the work after pressing the stop button for a certain period of time, then a power-off delay relay is needed to achieve the above functions. The time relay is a controller whose delay function is realized by an electronic circuit. According to the control occasion, you can choose to use: power-on delay type A; power-off delay type F; star-delta delay type Y; power-on delay type C with instantaneous output; interval delay type G; reciprocating delay type R ; Disconnect the delay signal type K and other specifications to meet the required control occasions.

What time relay is used for Mitsubishi PLC power-off delay

Mitsubishi does not have a power-off delay to close the relay. Only the power-on delay closes the relay, but it can be implemented by a program. as the picture shows,
When X0 is ON,
M0 reset,
M0 is disconnected in front,
T0 does not count,
When X0 becomes OFF,
M0 is set and T0 starts counting.
Time is up,
When the contact T0 is output, the function of closing the power-off delay is reached.