Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual KnX KnY KnM KnS T IST 7 steps

S0: Manual operation/initial state step point

S1: Zero point return/initial state step point

S2: Auto operation/initial state step point

D1 The

DVP-ES2/EX2/SS2/SA2/SX2/SE Operation Manual - Programming

API	Mnemonic	Operands	Function	Controllers
60	IST		Initial State	ES2/EX2	SS2	SA2 SX2
						SE

Type

Bit Devices

Word devices

Program Steps

OP

X

Y

M

S

K

H KnX KnY KnM KnS T

C D

E

F IST: 7 steps

S

*

*

*

D1

*

D2

*

PULSE

16-bit

32-bit

SA2

SA2

SA2

ES2/EX2 SS2 SE SX2 ES2/EX2 SS2

SE

SX2 ES2/EX2 SS2

SE

SX2

Operands:

S: Source device for assigning pre-defined operation modes (8 consecutive devices).

smallest No. of step points in auto mode. D2: The greatest No. of step points in auto mode.

Explanations:

75.The IST is a handy instruction specifically for the initial state of the step ladder operation modes.

76.The range of D1 and D2 : S20~S911, D1 < D2.

77.IST instruction can only be used one time in a program.

Program Example 1:

M1000
IST	X20	S20	S60

S:	X20: Individual operation (Manual operation)	X24: Continuous operation
	X21: Zero return	X25: Zero return start switch
	X22: Step operation	X26: Start switch
	X23: One cycle operation	X27: Stop switch

78.When IST instruction is executed, the following special auxiliary relays will be assigned automatically.

M1040: Movement inhibited

M1041: Movement start

M1042: Status pulse

M1047: STL monitor enable

79.When IST instruction is used, S10~S19 are occupied for zero point return operation and cannot be used as a general step point. In addition, when S0~S9 are in use, S0 initiates “manual operation mode”, S1 initiates “zero return mode” and S2 initiates “auto mode”. Thus, the three step points of initial state have to be programmed in first priority.

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