Mitsubishi Electric MELSEC FX Series - 7.7 Handy Instruction; 7.7.1 IST

7 Applied Instructions
7.7 Handy Instruction
322
FXCPU Structured Programming Manual
(Basic & Applied Instruction)
7.7 Handy Instruction
7.7.1 IST
Outline
This is a command for controlling the initial state and special auxiliary relay automatically in a program by
stepladder.
1. Format and operation, execution form
2. Set data
3. Applicable devices
S: Refer to "Cautions".
FX3U(C) FX3G FX2N(C) FX1N(C) FX1S FXU/FX2C FX0N FX0(S)
Instruction
name
Operation
Execution
form
Expression in each language
Structured ladder ST
IST 16 bits Continuous IST(E, s, d1, d2);
Variable Description Data type
Input
variable
EN Execution condition Bit
Beginning bit device of operation mode changeover switch Bit
Output
variable
ENO Execution state Bit
Minimum state of practical state in automatic mode [d1<d2] Bit
Maximum state of practical state in automatic mode [d1<d2] Bit
Operand
type
Bit Devices Word Devices Others
System user Digit designation
System
user
Special
unit
Index
Cons
tant
Real
number
Character
string
Pointer
XYMTC S
D
.b
KnX KnY KnM KnS T C D R
U\G
V Z Modifier K H E
"
"
P
zzz
S1
z
S2
z
S2
z
IST
EN
s
ENO
d1
d2