Basic Structure Of I/O Storages; Relation Between The Plc Action And The Device Type - Delta AH500 Hardware Operation Manual

A H 5 0 0 H a r d w a r e a n d O p e r a t i o n M a n u a l
Type
String* String
*1: The decimal forms are notated by K in the device lists in Chapter 5 and Chapter 6 in AH500 Programming
Manual, whereas K50 should be inputted in ISPSoft rather than merely 50.
*2: The floating-point numbers are notated by F/DF in the device lists in Chapter 5 and Chapter 6 in AH500
Programming Manual, whereas they are represented by decimal points in ISPSoft; for the floating-point
F500, one should input 500.0.
*3: The strings are notated by "$" in Chapter 5 and Chapter 6 in AH500 Programming Manual, whereas they
are represented by " " in ISPSoft; for the string of 1234, one should input "1234"in ISPSoft.

5.1.2 Basic Structure of I/O Storages

Device Function
X Input relay
Y Output relay
M Auxiliary relay
Special auxiliary
SM
relay
S stepping relay
T Timer
C Counter
HC 32-bit counter
D Data register
SR Special data register
L Link register
E Index register

5.1.3 Relation Between the PLC Action and the Device Type

PLC action
Power: OFF→ON
The output relay is cleared.
The state of the output relay
is retained.
The state of the output relay
STOP
returns to that before the
↓
PLC's stopping.
RUN
The non-latched area is
cleared.
The state of the latched area
is retained.
RUN→STOP
SM204 is ON.
(All non-latched areas are cleared.)
SM205 is ON.
(All latched areas are cleared.)
Default value
5 - 4
Device name
"$" 1~31 characters
Access of
bits
OK
OK
OK
OK
OK
OK
OK
OK
OK
-
OK
-
Device type Non-latched
Cleared
Retained
Retained
Retained
Cleared
Retained
Retained
Cleared
Retained
Number of devices
Access of Modification by
words ISPSoft
OK OK
OK OK
- OK
- OK
- OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
OK OK
Latched
area area
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Retained
Cleared
0 0
Range
Forcing the bit
ON/OFF
OK
OK
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Output relay
Cleared
Cleared
Retained
Refer to the settings of
device Y
Refer to the settings of
device Y
Retained
Retained
Cleared
Retained
0