Chapter 16 PLC Function ApplicationsMS300
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16-5 Various PLC Device Functions
Algorithmic control
method
The program is stored internally, alternating back-and-
forth scanning method.
The input point renews when the
scanning starts, and the output point
renews when the scanning ends.
Input / output
control method
When the scan starts again after ending (after execution
to the END command), the input/output is immediately
refreshed.
Algorithmic
processing speed
Basic commands (several μs);
Application command
(1 to several tens of μs)
Digital input (X): 7; digital output (Y): 3
Analog input: 2; analog output: 1
X0–X17, 16 points, octal
number
Corresponds to external input
point
Y0–Y17, 16 points, octal
number
Corresponds to external output
point
Contact can switch ON/OFF
within the program
Timers referred to by the TMR
command; T contact with the
same number switches ON
when the time is reached.
16-bit counter,
general use
Counter referred to by the CNT
command; C contact with the
same number switches ON
when the count is reached.
The contact switches ON when
the time is reached.
C0–C39, 16-bit counter 40 points
The counter contact switches
ON when the count is reached.
Used to
maintain
power OFF
Used as data storage memory
area
Setting Range: K-32,768–K32,767
Setting Range: K-2,147,483,648–K2,147,483,647
Setting Range: H0000–HFFFF
Setting Range: H00000000–HFFFFFFFF
Serial communication port
(program write / read)
RS-485 / USB / keypad port
Built-in two analog inputs and one analog output
Built-in a (MI7) 32-bit high-speed counter
Function expansion module
Communication Expansion
Module