1）LD（取指令） 一個(gè)常開觸點(diǎn)與左母線連接的指令，每一個(gè)以常開觸點(diǎn)開始的邏輯行都用此指令2）LDI（取反指令） 一個(gè)常閉觸點(diǎn)與左母線連接指令，每一個(gè)以常閉觸點(diǎn)開始的邏輯行都用此指令。（3）LDP（取上升沿指令） 與左母線連接的常開觸點(diǎn)的上升沿檢測指令，僅在指定位元件的上升沿（由OFF→ON）時(shí)接通一個(gè)掃描周期（4）LDF（取下降沿指令） 與左母線連接的常閉觸點(diǎn)的下降沿檢測指令。（5）OUT（輸出指令） 對線圈進(jìn)行驅(qū)動的指令，也稱為輸出指令取指令與輸出指令的使用說明：1）LD、LDI指令既可用于輸入左母線相連的觸點(diǎn)，也可與ANB、ORB指令配合實(shí)現(xiàn)塊邏輯運(yùn)算2）LDP、LDF指令僅在對應(yīng)元件有效時(shí)維持一個(gè)掃描周期的接通。3）LD、LDI、LDP、LDF指令的目標(biāo)元件為X 、Y 、M 、T、C、S；4）OUT指令可以連續(xù)使用若干次（相當(dāng)于線圈并聯(lián)），對于定時(shí)器和計(jì)數(shù)器，在OUT指令之后應(yīng)設(shè)置常數(shù)K或數(shù)據(jù)寄存器5）OUT指令目標(biāo)元件為Y、M、T、C和S，但不能用于X（1）AND（與指令） 一個(gè)常開觸點(diǎn)串聯(lián)連接指令，完成邏輯“與”運(yùn)算。（2）ANI（與反指令） 一個(gè)常閉觸點(diǎn)串聯(lián)連接指令，完成邏輯“與非”運(yùn)算。（3）ANDP 上升沿檢測串聯(lián)連接指令。（4）ANDF 下降沿檢測串聯(lián)連接指令觸點(diǎn)串聯(lián)指令的使用的使用說明：1）AND、ANI、ANDP、ANDF都指是單個(gè)觸點(diǎn)串聯(lián)連接的指令，串聯(lián)次數(shù)沒有限制，可反復(fù)使用2）AND、ANI、ANDP、ANDF的目標(biāo)元元件為X、Y、M、T、C和S。3）OUT M101指令之后通過T1的觸點(diǎn)去驅(qū)動Y4稱為連續(xù)輸出。觸點(diǎn)并聯(lián)指令（OR/ORI/ORP/ORF）（1）OR（或指令） 用于單個(gè)常開觸點(diǎn)的并聯(lián)，實(shí)現(xiàn)邏輯“或”運(yùn)算。（2）ORI（或非指令） 用于單個(gè)常閉觸點(diǎn)的并聯(lián)，實(shí)現(xiàn)邏輯“或非”運(yùn)算3）ORP 上升沿檢測并聯(lián)連接指令。（4）ORF 下降沿檢測并聯(lián)連接指令觸點(diǎn)并聯(lián)指令的使用說明：1）OR、ORI、ORP、ORF指令都是指單個(gè)觸點(diǎn)的并聯(lián)，并聯(lián)觸點(diǎn)的左端接到LD、LDI、LDP或LPF處，右端與前一條指令對應(yīng)觸點(diǎn)的右端相連。觸點(diǎn)并聯(lián)指令連續(xù)使用的次數(shù)不限；2）OR、ORI、ORP、ORF指令的目標(biāo)元件為X、Y、M、T、C、S。塊操作指令（ORB / ANB（1）ORB（塊或指令） 用于兩個(gè)或兩個(gè)以上的觸點(diǎn)串聯(lián)連接的電路之間的并聯(lián)。ORB指令的使用說1）幾個(gè)串聯(lián)電路塊并聯(lián)連接時(shí)，每個(gè)串聯(lián)電路塊開始時(shí)應(yīng)該用LD或LDI指令；2）有多個(gè)電路塊并聯(lián)回路，如對每個(gè)電路塊使用ORB指令，則并聯(lián)的電路塊數(shù)量沒有限制；3）ORB指令也可以連續(xù)使用，但這種程序?qū)懛ú煌扑]使用，LD或LDI指令的使用次數(shù)不得超過8次，也就是ORB只能連續(xù)使用8次以下（2）ANB（塊與指令） 用于兩個(gè)或兩個(gè)以上觸點(diǎn)并聯(lián)連接的電路之間的串聯(lián)。ANB指令的使用說明：1）并聯(lián)電路塊串聯(lián)連接時(shí)，并聯(lián)電路塊的開始均用LD或LDI指令；2）多個(gè)并聯(lián)回路塊連接按順序和前面的回路串聯(lián)時(shí)，ANB指令的使用次數(shù)沒有限制。也可連續(xù)使用ANB，但與ORB一樣，使用次數(shù)在8次以下。置位與復(fù)位指令（SET/RST1）SET（置位指令） 它的作用是使被操作的目標(biāo)元件置位并保持（2）RST（復(fù)位指令） 使被操作的目標(biāo)元件復(fù)位并保持清零狀態(tài)。SET、RST指令的使用，當(dāng)X0常開接通時(shí)，Y0變?yōu)镺N狀態(tài)并一直保持該狀態(tài)，即使X0斷開Y0的ON狀態(tài)仍維持不變；只有當(dāng)X1的常開閉合時(shí)，Y0才變?yōu)镺FF狀態(tài)并保持，即使X1常開斷開，Y0也仍為OFF狀態(tài)。SET 、RST指令的使用SET指令的目標(biāo)元件為Y、M、S，RST指令的目標(biāo)元件為Y、M、S、T、C、D、V 、Z。RST指令常被用來對D、Z、V的內(nèi)容清零，還用來復(fù)位積算定時(shí)器和計(jì)數(shù)器。2）對于同一目標(biāo)元件，SET、RST可多次使用，順序也可隨意，但后執(zhí)行者有效。微分指令（PLS/PLF）（1）PLS（上升沿微分指令） 在輸入信號上升沿產(chǎn)生一個(gè)掃描周期的脈沖輸出（2）PLF（下降沿微分指令） 在輸入信號下降沿產(chǎn)生一個(gè)掃描周期的脈沖輸出。利用微分指令檢測到信號的邊沿，通過置位和復(fù)位命令控制Y0的狀態(tài)PLS、PLF指令的使用說明：1）PLS、PLF指令的目標(biāo)元件為Y和M；2）使用PLS時(shí)，僅在驅(qū)動輸入為ON后的一個(gè)掃描周期內(nèi)目標(biāo)元件ON，M0僅在X0的常開觸點(diǎn)由斷到通時(shí)的一個(gè)掃描周期內(nèi)為ON；使用PLF指令時(shí)只是利用輸入信號的下降沿驅(qū)動，其它與PLS相同。主控指令（MC/MCR）1）MC（主控指令） 用于公共串聯(lián)觸點(diǎn)的連接。執(zhí)行MC后，左母線移到MC觸點(diǎn)的后面。2）MCR（主控復(fù)位指令） 它是MC指令的復(fù)位指令，即利用MCR指令恢復(fù)原左母線的位置。在編程時(shí)常會出現(xiàn)這樣的情況，多個(gè)線圈同時(shí)受一個(gè)或一組觸點(diǎn)控制，如果在每個(gè)線圈的控制電路中都串入同樣的觸點(diǎn)，將占用很多存儲單元，使用主控指令就可以解決這一問題。MC、MCR指令利用MC N0 M100實(shí)現(xiàn)左母線右移，使Y0、Y1都在X0的控制之下，其中N0表示嵌套等級，在無嵌套結(jié)構(gòu)中N0的使用次數(shù)無限制；利用MCR N0恢復(fù)到原左母線狀態(tài)。如果X0斷開則會跳過MC、MCR之間的指令向下執(zhí)行。MC、MCR指令的使用說明：1）MC、MCR指令的目標(biāo)元件為Y和M，但不能用特殊輔助繼電器。MC占3個(gè)程序步，MCR占2個(gè)程序步；）主控觸點(diǎn)在梯形圖中與一般觸點(diǎn)垂直。主控觸點(diǎn)是與左母線相連的常開觸點(diǎn)，是控制一組電路的總開關(guān)。與主控觸點(diǎn)相連的觸點(diǎn)必須用LD或LDI指令。3）MC指點(diǎn)斷開時(shí)，在MC和MCR之內(nèi)的積算定時(shí)器、計(jì)數(shù)器、用復(fù)位/置位指令驅(qū)動的元件保持其之前的狀態(tài)不變。非積算定時(shí)器和計(jì)數(shù)器，用OUT指令驅(qū)動的元件將復(fù)位，22中當(dāng)X0斷開，Y0和Y1即變?yōu)镺FF。

1) LD (take command) a command connecting a normally open contact to the left bus, and each logic line starting with the normally open contact uses this command. 2) LDI (take reverse command) a command connecting a normally closed contact to the left bus, and each logic line starting with the normally closed contact uses this command. (3) The rising edge detection command of the normally open contact connected between the LDP (taking the rising edge command) and the left bus is only connected for one scanning cycle (4) when the rising edge of the positioning element is pointed (from off to on). The falling edge detection command of the normally closed contact connected between the LDF (taking the falling edge command) and the left bus. (5) Out (output command) command to drive the coil, also known as output command fetch command and output command instructions: 1) ld and LDI commands can be used to input the contacts connected to the left bus, and can also cooperate with anb and orb commands to realize block logic operation. 2) LDP and LDF commands only maintain the connection of a scanning cycle when the corresponding components are valid. 3) The target components of LD, LDI, LDP and LDF instructions are x, y, m, t, C and S; 4) The out command can be used several times continuously (equivalent to coil parallel connection). For timers and counters, the constant K or data register should be set after the out command. 5) the target components of the out command are y, m, t, C and s, but it cannot be used for a normally open contact series connection command of X (1) and (and command) to complete the logical "and" operation. (2) Ani (and reverse command) a normally closed contact is connected in series to complete the logical "and not" operation. (3) The rising edge of the andp detects the serial connection command. (4) Instructions for the use of andf falling edge detection series connection command contact series connection command: 1) and, ani, andp, andf all refer to the command of single contact series connection. The number of series connections is unlimited and can be used repeatedly. 2) the target components of and, ani, andp, andf are x, y, m, t, C, and s. 3) Driving Y4 through the contact of T1 after the out M101 command is called continuous output. Contact parallel instruction (or/ori/orp/orf) (1) or (or instruction) is used for parallel connection of single normally open contact to realize logical "or" operation. (2) Ori (or not command) is used for parallel connection of single normally closed contact to realize logical "or not" operation 3) ORP rising edge detection of parallel connection command. (4) Instructions for use of ORF falling edge detection parallel connection command contact parallel command: 1) or, ori, ORP and ORF commands refer to the parallel connection of a single contact. The left end of the parallel contact is connected to LD, LDI, LDP or LPF, and the right end is connected to the right end of the contact corresponding to the previous command. The number of continuous use of the contact parallel command is unlimited; 2) The target components of or, ori, ORP and ORF instructions are x, y, m, t, C and s. Block operation command (ORB / anb (1) orb (block or command) is used for parallel connection between circuits with two or more contacts connected in series. Use of orb instruction 1) when several series circuit blocks are connected in parallel, LD or LDI instruction should be used at the beginning of each series circuit block; 2) There are multiple circuit block parallel circuits. If the orb command is used for each circuit block, the number of circuit blocks in parallel is unlimited; 3) Orb instruction can also be used continuously, but this programming method is not recommended. LD or LDI instruction shall not be used more than 8 times, that is, orb can only be used continuously for less than 8 times (2) anb (block and instruction) for series connection between circuits with two or more contacts connected in parallel. Instructions for using anb command: 1) when parallel circuit blocks are connected in series, LD or LDI command is used at the beginning of parallel circuit blocks; 2) When multiple parallel circuit blocks are connected in series with the previous circuit in sequence, there is no limit on the number of times anb commands can be used. Anb can also be used continuously, but like orb, it is used less than 8 times. Set and reset instruction (set/rst1) set (set instruction) its function is to set and maintain the operated target element (2) rst (reset instruction) to reset and maintain the reset state of the operated target element. The use of set and RST commands. When x0 is normally open and connected, Y0 changes to the on state and remains in this state. Even if x0 is disconnected, Y0's on state remains unchanged; Only when X1 is normally open and closed, Y0 becomes off and remains. Even if X1 is normally open and closed, Y0 is still off. The target components of set and RST instructions are y, m and S. the target components of RST instructions are y, m, s, t, C, D, V and Z. Rst instruction is often used to clear the contents of D, Z and V, and to reset the integrating timer and counter. 2) For the same target component, set and RST can be used multiple times, and the order can be arbitrary, but the last executor is valid. Differential command (pls/plf) (1) PLS (rising edge differential command) generates pulse output of one scanning cycle at the rising edge of the input signal (2) PLF (falling edge differential command) generates pulse output of one scanning cycle at the falling edge of the input signal. Use the differential command to detect the edge of the signal, and control the status of Y0 through the set and reset commands. Instructions for the use of PLS and PLF commands: 1) the target components of PLS and PLF commands are y and m; 2) When using PLS, the target element is on only in one scanning cycle after the drive input is on, and M0 is on only in one scanning cycle when the normally open contact of x0 changes from off to on; When PLF command is used, it is only driven by the falling edge of the input signal, and the others are the same as pls. Master command (mc/mcr) 1) MC (master command) is used for connection of common series contacts. After MC is executed, the left busbar moves behind the MC contact. 2) MCR (master control reset instruction) is the reset instruction of MC instruction, that is, use MCR instruction to restore the position of the original left bus. In programming, it often happens that multiple coils are controlled by one or a group of contacts at the same time. If the same contacts are connected in series in the control circuit of each coil, it will occupy a lot of storage units. This problem can be solved by using the master command. MC and MCR instructions use MC N0 M100 to realize the right shift of the left bus, so that Y0 and Y1 are under the control of x0, where N0 represents the nesting level, and there is no limit to the number of times N0 can be used in the non nested structure; Use MCR N0 to restore to the original left bus state. If x0 is disconnected, the instruction between MC and MCR will be skipped and executed downward. Instructions for use of MC and MCR commands: 1) the target components of MC and MCR commands are y and m, but special auxiliary relays cannot be used. MC accounts for 3 procedure steps and MCR for 2 procedure steps;) The main control contact is perpendicular to the general contact in the ladder diagram. The main control contact is a normally open contact connected to the left bus and is the main switch that controls a group of circuits. The contacts connected with the main control contacts must be commanded by LD or LDI. 3) When MC refers to disconnection, the integrating timer, counter and components driven by reset / set command in MC and MCR remain unchanged. For non integrating timers and counters, components driven by out command will be reset. When x0 is disconnected in 22, Y0 and Y1 will become off.