1, System blocks ------ Properties - "increases the storage area ---" No run mode edit to increase the storage area   No tick .2, After the connection PLC, the Debug menu ---- under "RUN (run) mode editing program.

When you write the Siemens program, the first to compile, Then to download. If the compiler is wrong, the programming software will prompt below.

1, check if the terminal screw loose or disconnected wires; 2, replace the power module. 3, check the external power supply is normal;

If S7-300/400 master station with STEP 7 configuration PROFIBUS network. To configure the third-party DP slave, you need to install the GSD file. You can see it in the Hardware Catalog window after installation. To delete STEP7 hardware catalog third party DP slave, first install the "S7DATA" in STEP7 folder> GSD file "GSD" subfolder deleted installation. … Continue reading How can I delete STEP7 hardware catalog third party DP slave?

After entering the device configuration Select the corresponding PLC network view in the directory in the right-hand side, Added to the network view, Click the PLC network interface, The following attributes, Ethernet address (DP network, then on display DP network address), Click the Ethernet address (DP network, then on display DP network address), In "IP … Continue reading How to change the IP address of the S7-1200?

There are a lot of reason make to plc causes, hardware and software errors make to crashes. 1, hardware (1) I/O channeling, PLC automatically detect I/O errors, enter STOP mode. (2) I/O damaged,Program can not execute the command. (3) PLC connection module And the address assignment module failed.  (4) power Interferenceor failure. (5) address assignment PLC connection module and a … Continue reading PLC crash reason