Siemens PLC's signal forced operation - Solutions - Huaqiang Electronic Network

Brand AVX TPSE226M035R0125: Low impedance tantalum capacitor from AVX, with a capacitance of 22 µF and voltage rating of 3.5V. Ideal for high-frequency and low-noise applications.

Electronic scale crystal oscillator, 3.2 x 2.5mm, 3225 size, 16MHz (16.000MHz), 12PF, 10PPM, 20PPM, 30PPM. Suitable for precision timing in industrial and consumer electronics.

Factory direct sales - solid aluminum electrolytic capacitors in SMD package. Ensure top-quality products directly from the manufacturer. Perfect for high-reliability applications.

In the "New Value" column of the state diagram, you can input the desired signal value to perform a forced update of the status. For safety, it is recommended to force signals only when the PLC is in the STOP mode. To do this, select the "Write-ForceOutputsInSTOP" option under the main menu "Debug".

Once the new forced value is entered, you can activate the specified signal by clicking the "Force" button on the toolbar. To cancel the forced operation, click the "Unforce" button. Additionally, the "AllUnforced" button allows you to deactivate all signals at once.

The "Force" and "Unforce" options are available only for memory types such as V, M, AI, and AQ, and for data lengths of byte, word, and double word.

By selecting different options under the "Debug" menu, you can access several useful debugging features:

"SingleRead": This function retrieves a "transient map", meaning it updates the status of all signals just once without continuously polling the PLC. It’s useful for one-time status checks.

"WriteAll": After entering all the new values, use this option to send all modified values to the PLC at once. This is ideal for simulating multiple control conditions or triggering a set of actions within the program.

"Force": Use the "Force" button on the toolbar to set a specific signal to a defined value, overriding its normal behavior.

"ReadAllForce": This command forces all signals to their pre-set values, allowing for quick configuration changes during testing or troubleshooting.

"UnforcedAll": Clicking this button on the toolbar will release all previously forced signals, restoring their original states. This is essential for returning the system to normal operation after debugging.