plc program
Using local variables DWORD LD20 as a pointer, the pointer address is P#4.3. Statement form can be INDIRECT when the status monitor (indirect) pointer address LD20 4.3. M [LD 20] corresponds to the actual address is M4.3.
Method one: CPU clock memoryCPU in the hardware configuration properties "Cycle/Clock Memory" in the "Clock Memory" setting the Memory Byte, you can look at to help, each one having a fixed frequency "Propreties" window click on the "Cycle/Clock Memory" (loop memory/clock) tab, you can set the "Scan cycle monitoring time" ( Scanning cycle monitoring time … Continue reading S7-300/400PLC pulse method
FB--function blocks, blocks with background dataFC--function, or functionThey Zhijian of main difference is: FC using of is shared data block, FB using of is background data block lift a example, if you to on 3 a parameter same of motor for control, so only need using FB programming plus 3 a background data block on … Continue reading The difference between Simens PLC programming FB and FC
PLS (pulse) rising differential outputPLF (pulse) down along the differential output
PLC including I/O points and user storage capacity the capacity of two aspects.(A) Selection of I/O pointsPLC I/O points average prices are still relatively high, so the number of reasonable selection of PLC I/O points, to meet control requirements and strive to use the minimum number of I/O points, but you must have a certain … Continue reading PLC selection of simple capacity
1. Storage capacityStorage capacity refers to the user program memory capacity. User program memory capacity, you can develop complex programs. Generally, small PLC user memory capacity for thousands of words, and mainframe user memory capacity of up to tens of thousands of words.2. I/O pointsInput/output (I/O) points is acceptable to the PLC the sum of … Continue reading PLC properties
Relays are mechanical components have life, transistors are electronic components, only the age, no usage limits. Relay switching times per minute is also limited, and transistors are not. Transistors also have high current, such as 5A above.1. the load voltage and current typeType of load: transistor can only bring a DC load, and relays with … Continue reading Difference between transistor outputs of the PLC and relay output
PLC FX3U some columns may be NPN type or PNP type sensor and wiring simple.FX3U S/S on terminals, S/S by Terminal block of 24V and 0V terminals or terminal connected to leak, source input switch.Missing input: connect the 24V and S/S terminals-Source input: connect the 0V terminals and S/S TerminalBy choosing you can set the … Continue reading FX3U PLC external sensor connection
PLC communication module is used to complete with other PLC and other communications between intelligent control device or computer. Following simple FX series communication function expansion board, adapter and communication modules.(1) communication standard connection expansion board FX2N-232-BD FX2N-232-BD is RS-232C transmission PLC interface with other equipment. Such as PC, barcode readers or printers. Can be … Continue reading Special features of Mitsubishi FX series PLC modules-data communication module
Passwords can limit set PLC programming tool, display module, interface to read and write procedures, monitoring, change the current values, and so on, to protect programs or restrict the operator's procedures for monitoring purposes.Mitsubishi FX series PLC password set way: will PLC power, and through programming cable and computer connection, in programming software GX-DEVELOPER in … Continue reading Mitsubishi PLC password settings
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