First, input/output (I/O) point estimateI/O points should be considered when estimating the appropriate margins, usually according to the statistics of the input and output points, adding 10%~20% and ExtensibleAfter allowance, as input and output point estimates. Actual orders, according to manufacturer product features of the PLC, the input and output points are rounded.Second, the storage … Continue reading PLC selection guide
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PLC-contact (OR/ORI) Instructions Use for example
OR (or) normally open contacts connected in parallel directivesORI (or not) normally closed contacts connected in parallel directivesIntroductions:(1) OR ORI is connected in parallel to a single point of contact and instructions, paralleling a plurality of contacts cannot be used with this directive(2) and ORI OR directive from which the current step, LD, LDI instruction … Continue reading PLC-contact (OR/ORI) Instructions Use for example
PLC input/output instructions (LD/LDI/OUT)
LD with the LDI instruction for contacts connected to the bus, in addition to starting point that can be used in the branch circuit.Coil is driven OUT instructions instructions, can be used to output relays, auxiliary relays, timers, counters, registers, and so on, but cannot be used to enter a relay. Output directive is used … Continue reading PLC input/output instructions (LD/LDI/OUT)
PLC-contact instructions (FNC224~FNC246)
Contact compare total 18(1) the LD contacts compare this kind of instruction mnemonics, code, and functionality.(2) compare AND contact the class instruction mnemonic, code(3) OR contact instructionsOR= instructions for use as shown in Figure 3-93, when X1 is ON, or the current value of the counter is 200, driving Y0.Contact compare any data format of … Continue reading PLC-contact instructions (FNC224~FNC246)
PLC gray code conversion and analog module special instructions
(1) gray code transform and inverse transform instructions these instructions 2: GRY (FNC170) and GBIN (FNC171), used for photoelectric encoder encoder disk data. (D) GRN (p) instruction function is to convert binary to gray code, (d) GBIN (p) instruction is the inverse transform of GRY. As shown in Figure 3-89, GRY command is the source … Continue reading PLC gray code conversion and analog module special instructions
PLC Clock operation Instructions (FNC160~FNC169)
Seven clock operation class instruction, Directive number distribution between FNC160~FNC169. Such instructions are on the clock clock operation operation and compare the data, PLC built-in real-time clock for time calibration and data formatting.(1) clock and data compare TCMP (FNC160) TCMP (p) function is used to compare the data in the specified time and clock size. … Continue reading PLC Clock operation Instructions (FNC160~FNC169)
PLC Floating point arithmetic Instructions FNC110~FNC139
Floating point arithmetic instructions include floating point comparison, arithmetic, square root operations and functions such as trigonometric functions. They are located in the order number is FNC110~FNC119, FNC120~FNC129, FNC130~FNC139.(1) binary floating-point comparison instruction ECMP (FNC110) DECMP (p) instruction used is shown in Figure 3-83, to compare two source operands, the result reflected in the destination … Continue reading PLC Floating point arithmetic Instructions FNC110~FNC139
PLC Peripheral devices (SER) instructions (FNC80~FNC89)
Peripherals (SER) instructions include RS serial communication instruction (FNC80), octal data transfer instructions PRUN (FNC81), HEX ASCII conversion instructions → ASCI (FNC82), ASCII HEX → HEX conversion instructions (FNC83), the checksum command CCD (FNC84), an analog input VRRD (FNC85), VRSC setting instructions analog switch (FNC86) and PID Command PID (FNC88) 8 instructions.(1) the octal data … Continue reading PLC Peripheral devices (SER) instructions (FNC80~FNC89)
PLC External I/0 Equipment directive (FNC70~FNC79)
External I/0 equipment in the FX series and peripheral information of the instruction, a total of 10. Respectively is 10 key entered instruction TKY (FNC70), and 16 key entered instruction HKY (FNC71), and digital switch entered instruction DSW (FNC72), and seven paragraph decoding instruction SEGD (FNC73), and with lock save of seven paragraph displayed instruction … Continue reading PLC External I/0 Equipment directive (FNC70~FNC79)
PLC Easy instructions (FNC60~FNC69)
FX Series total 10 article convenient instruction: initial of instruction IST (FNC60), and data search instruction SER (FNC61), and absolute type cam Shun control instruction ABSD (FNC62), and incremental type cam Shun control instruction INCD (FNC63), and teaching timing instruction TIMR (FNC64), and special timer instruction STMR (FNC65), and alternating output instruction ALT (FNC66), and … Continue reading PLC Easy instructions (FNC60~FNC69)
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