Initial State - Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual

8.19

Initial State

Initial State
IST
Automatically controls the initial state and special relays in a step ladder program.
Ladder diagram
(s) (d1) (d2)
FBD/LD
EN ENO
s d1
d2
Setting data
■Descriptions, ranges, and data types
Operand Description
(s) Head bit device number of the selector switch in the operation
mode
(d1) Smallest state relay number of practical state relays in the
automatic mode
((d1) < (d2))
(d2) Largest state relay number of practical state relays in the
automatic mode
((d1) < (d2))
EN Execution condition
ENO Execution result
■Applicable devices
Operand Bit
X, Y, M, L, SM,
F, B, SB, S
*1

(s)
*2
(d1) 
*2

(d2)
*1 S cannot be used.
*2 Only S can be used.
*3 T, ST, C cannot be used.
Processing details
• Specify the head input in the operation mode in (s).
• Selector switches in the operation mode occupy eight devices from the head device.
Word
T, ST, C, D, W, U\G
SD, SW, R
*3
 
 
 
Structured text
ENO:=IST(EN, s, d1, d2);
Range Data type

Bit

Bit

Bit

Bit

Bit
Double word Indirect
specification
Z LC LZ
   
   
   
Data type (label)
ANYBIT_ARRAY
(Number of elements: 8)
ANY_BOOL
ANY_BOOL
BOOL
BOOL
Constant Others
K, H E $
   
   
   
8 APPLICATION INSTRUCTION
8.19 Initial State
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