Delta DVP-ES2 - Manual (Page 644)

D V P - E S 2 E X 2 / S S 2 / S A2 / S X 2 / S E O p e r a t i o n M a n u a l - P r o g r a m m i n g
5.6 IST Instruction
API Mnemonic Operands Function
Controllers
ES2/EX2 60 IST Initial State SS2 SA2 SX2
Bit Devices Word devices Program Steps Type
OP X Y M S K H KnX KnY KnM KnS T C D E F IST: 7 steps
S * * *
D *
1
D *
2
PULSE 16-bit 32-bit
ES2/EX2 SS2 SA2 SX2 ES2/EX2 SS2 SA2 SX2 ES2/EX2 SS2 SA2 SX2
Operands:
S: Source device for assigning pre-defined operation modes (8 consecutive devices). D
1
The
smallest No. of step points in auto mode. D
2
: The greatest No. of step points in auto mode.
Explanations:
1. The IST is a handy instruction specifically for the initial state of the step ladder operation
modes.
2. The range of D
1
and D
2
: S20~S911, D
1
< D
2
.
3. IST instruction can only be used one time in a program.
Program Example 1:
M1000
IST X20 S20 S60
X20: Individual operation (Manual operation) X24: Continuous operation S:
X21: Zero return X25: Zero return start switch
X22: Step operation X26: Start switch
X23: One cycle operation X27: Stop switch
1. When IST instruction is executed, the following special auxiliary relays will be assigned
automatically.
M1040: Movement inhibited S0: Manual operation/initial state step point
M1041: Movement start S1: Zero point return/initial state step point
M1042: Status pulse S2: Auto operation/initial state step point
M1047: STL monitor enable
2. 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
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