PS 307 power supply module 120/230 AC voltage into a DC voltage of 24V, for the S7-300 PLC, sensors and actuators. Output current 2A, SA and 10A total of three kinds. Slot Power modules are mounted on DIN rail 1.
S7-300 PLC power module
Category: plc program
S7-300 PLC counter instruction
S7-300 PLC to read or transfer the status word
STW ∥ status word 0 to 8 loaded into the accumulator 1, the accumulator 9 to 31 is cleared T STW ∥ will transfer the contents of accumulator 1 to the status word
S7-300 PLC ladder Block transfer instruction
MOVE command to assign values to variables. MOVE instruction can transmit data with a length of 8, 16 or 32 of all the basic data types. But the transfer of user-defined data types, you must use the system integration function (SFC)
Siemens S7 200 PLC high-speed counter (HC)
High-speed counter for frequencies above scan cycle external signals are counted, using a dedicated high-speed counter terminals of the host to receive these high-speed signals. High-speed counter is a high-speed event counting, it is independent of the CPU scan, the data for the current value of high-speed 32-bit signed calculator.Format: HC [high-speed counter number] For … Continue reading Siemens S7 200 PLC high-speed counter (HC)
Siemens S7-200 PLC Timer Area (T)
Relay output is used to output signals transmitted to load PLC, is dedicated output process image register. It can only be driven program instructions. At the end of each scan cycle, CPU output image register value is copied to the physical output points, and the sampling value is written to drive the load. Output relay … Continue reading Siemens S7-200 PLC Timer Area (T)
S7-200 PLC ladder diagram
PLC ladder diagram LD
Sample PLC ladder diagram
S7-200 series PLC counter (CTUD) instruction
PLC ONE 