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DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

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<strong>DVP</strong>-<strong>ES2</strong>/<strong>EX2</strong>/<strong>SS2</strong>/<strong>SA2</strong>/<strong>SX2</strong>/SE <strong>Operation</strong> <strong>Manual</strong> - Programming<br />

API Mnemonic Operands Function<br />

60 IST Initial State<br />

Controllers<br />

<strong>ES2</strong>/<strong>EX2</strong> <strong>SS2</strong> <strong>SA2</strong><br />

SE<br />

<strong>SX2</strong><br />

Type Bit Devices Word devices Program Steps<br />

OP X Y M S K H KnX KnY KnM KnS T C D E F IST: 7 steps<br />

S * * *<br />

D 1 *<br />

D 2 *<br />

PULSE 16-bit 32-bit<br />

<strong>ES2</strong>/<strong>EX2</strong> <strong>SS2</strong> <strong>SA2</strong><br />

<strong>SA2</strong><br />

<strong>SA2</strong><br />

<strong>SX2</strong> <strong>ES2</strong>/<strong>EX2</strong> <strong>SS2</strong> <strong>SX2</strong> <strong>ES2</strong>/<strong>EX2</strong> <strong>SS2</strong><br />

SE SE SE <strong>SX2</strong><br />

Operands:<br />

S: Source device for assigning pre-defined operation modes (8 consecutive devices). D 1 The<br />

smallest No. of step points in auto mode. D 2 : The greatest No. of step points in auto mode.<br />

Explanations:<br />

75. The IST is a handy instruction specifically for the initial state of the step ladder operation<br />

modes.<br />

76. The range of D 1 and D 2 : S20~S911, D 1 < D 2 .<br />

77. IST instruction can only be used one time in a program.<br />

Program Example 1:<br />

M1000<br />

IST X20 S20 S60<br />

S: X20: Individual operation (<strong>Manual</strong> operation)<br />

X21: Zero return<br />

X22: Step operation<br />

X23: One cycle operation<br />

X24: Continuous operation<br />

X25: Zero return start switch<br />

X26: Start switch<br />

X27: Stop switch<br />

78. When IST instruction is executed, the following special auxiliary relays will be assigned<br />

automatically.<br />

M1040: Movement inhibited<br />

S0: <strong>Manual</strong> operation/initial state step point<br />

M1041: Movement start<br />

S1: Zero point return/initial state step point<br />

M1042: Status pulse<br />

S2: Auto operation/initial state step point<br />

M1047: STL monitor enable<br />

79. When IST instruction is used, S10~S19 are occupied for zero point return operation and<br />

cannot be used as a general step point. In addition, when S0~S9 are in use, S0 initiates<br />

“manual operation mode”, S1 initiates “zero return mode” and S2 initiates “auto mode”. Thus,<br />

the three step points of initial state have to be programmed in first priority.<br />

3-152

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