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Type Description Remark
FD
Function
register
Register for the exchange data between a subroutine call
source and a subroutine program
Z Index register
Register for modification to the devices (X, Y, M, L, B, F, T, C,
D, W, R, K, H, and P)
N Nesting Shows the nesting (nested structure) of the master control.
P Pointer
Locates the jump addresses of the branch instructions (CJ,
SCJ, CALL and JMP).
I
Interruption
pointer
Locates a jump address that corresponds to the factor of the
interruption when an interruption occurs.
J
Network No.
specification
device
Used to specify the network number in the data link
instructions.
U
I/O No.
specification
device
Used to specify the I/O number in the intelligent function
module dedicated instructions.
K
Decimal
constant
Used to specify the following; timer counter set value, pointer
number, interruption pointer number, number of digits of bit
device, and basic/application instruction values.
H
Hexadecimal
constant
Used to specify the basic/application instruction values.
E Real number
constant
Used to specify real numbers as instructions.
"Character
String"
Character string
constant
Used to specify character strings as instructions.
Jn\X
Jn\Y
Jn\B
Jn\SB
• Bit device
• Mainly handles on/off
signals.
Jn\W
Jn\SW
Link direct
device
Device that can access directly to a link device of a network
module (The refresh parameter setting is not required.)
Un\G
Intelligent
function module
device
Device that can access directly to the buffer memory of a
intelligent function module
• Word device
• Mainly handles data.
• One word consists of
16 bits.