[Instruction] Contents
[Instruction] Contents [Instruction] Contents
●STPEND :(Displayed in WinProladder)orSTPEND :(Displayed in FP-07)This instruction represents the end of a process. It is necessary to include this instruction so all processes can beoperated correctly.A PLC can have up to 8 step processes (S0~S7) and is able to control them simultaneously. Therefore, up to 8STPEND instructions can be obtained.【Example】WinProladderFP-07M1924STP S0STPENDM1924STP S0STPENDTO S0ORGTOSTP˙˙˙STPENDM1924S0S0M1924STP S1STPENDM1924STP S7STPENDM1924STP S1STPENDM1924STP S7STPENDTO S1TO S7ORGTOSTP˙˙˙STPENDORGTOSTP˙˙˙STPENDM1924S1S1M1924S7S7【Description】 When ON, the 8 step processes will be active simultaneously.8-10
8.4 Notes for Writing a Step Ladder Diagram【Notes】●In actual applications, the ladder diagram can be used together with the step ladder.●There are 8 steps, S0~S7, that can be used as the starting point and are called the “initial steps”.●When PLC starts operating, it is necessary to activate the initial step. The M1924 (the first scan ON signal) providedby the system may be used to activate the initial step.●Except the initial step, the start of any other steps must be driven by other step.●It is necessary to have an initial step and the final STPEND instruction in a step ladder diagram to complete a stepprocess program.●There are 980 steps, S20~S999, available that can be used freely. However, used numbers cannot be repeated.S500~S999 are retentive(The range can be modified by users), can be used if it is required to continue the machineprocess after power is off.●Basically a step must consists of three parts which are control output, transition conditions and transition targets.●MC and SKP instructions cannot be used in a step program and the sub-programs. It’s recommended that JMPinstruction should be avoided as much as possible.●If the output point is required to stay ON after the step is divergent to other step, it is necessary to use the SETinstruction to control the output point and use RST instruction to clear the output point to OFF.●Looking down from an initial step, the maximum number of horizontal paths is 16. However, a step is only allowed tohave up to 8 branch paths.●When M1918=0(default), if a PULSE type function instruction is used in master control loop (FUN 0) or a stepprogram, it is necessary to connect a TU instruction before the function instruction. For example,STP S20S20C0PV : 5When M1918=1, the TU instruction is not required, e.g.:STP S20C0PV : 58-11
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- Page 248 and 249: MEMO
- Page 250 and 251: 8.2 Basic Formation of Step Ladder
- Page 252 and 253: . Single CycleM1924X0• When step
- Page 254 and 255: ●STP Sxxx : S20≦Sxxx≦S999(Dis
- Page 256 and 257: 【Description】: 1. When ON, the
- Page 260 and 261: Example 1WinProladderFP-07M1924STP
- Page 262 and 263: Example 3WinProladderFP-07M1924STP
- Page 264 and 265: WinProladderFP-07M1924STP S0X1X2X0S
- Page 266 and 267: WinProladderM1924TO S0X1STP S0SET Y
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- Page 270 and 271: 8.6 Syntax Check Error Codes for St
- Page 272 and 273: 1.1 Profile112798716外 徑 4ψ×4
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- Page 276 and 277: 1.5.2 FUN function description• F
- Page 278 and 279: 【Example】Assume definition as R
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●STPEND :(Displayed in WinProladder)orSTPEND :(Displayed in FP-07)This instruction represents the end of a process. It is necessary to include this instruction so all processes can beoperated correctly.A PLC can have up to 8 step processes (S0~S7) and is able to control them simultaneously. Therefore, up to 8STPEND instructions can be obtained.【Example】WinProladderFP-07M1924STP S0STPENDM1924STP S0STPENDTO S0ORGTOSTP˙˙˙STPENDM1924S0S0M1924STP S1STPENDM1924STP S7STPENDM1924STP S1STPENDM1924STP S7STPENDTO S1TO S7ORGTOSTP˙˙˙STPENDORGTOSTP˙˙˙STPENDM1924S1S1M1924S7S7【Description】 When ON, the 8 step processes will be active simultaneously.8-10