2 - 2
Available Memory
*
1
•
For the items for which double-word numeric type can be set (e.g. numeric data display,
graph, etc.), specify “double word” from the editor.
For the items for which double-word cannot be specified (e.g. read/write area, buffering area,
etc.), only lower 16 bits become the object of processing, and upper 16 bits are ignored.
*
2
•
Step relay
•
S area is the memory for controlling steps, in which numbers for the location of steps are
stored. For sequence instructions and word operation instructions from PLC program, S area
for 100 words is prepared, supposing the data structure of directly readable/writable unsigned
2-digit BCD (8-bit).
Step number corresponds to individual value of 2-digit BCD. It does not correspond to bit,
unlike in B, M, K or other areas. In using step numbers, you can imagine as if 100 pieces of
SC coil (00 to 99) exist in one word.
•
For above explained reasons, with the POD, S area cannot be specified for switch memory or
lamp memory. To access the S area, use word operation switch. (Specify the step number
to be turned ON by the operational expression for word operation switch (transfer).)
[Example]
To set such that S00.20 turns ON when the switch on the screen is pressed,
Operation of switch:
Set to word operation.
Operation expression: Set to “transfer”.
Source:
Set constant “20 (h) ”.
Destination:
Set “WS00”.
•
Do not specify SC area for data display or as the control area of various modes, as doing so
may result in abnormal operation. However, when 2-digit or smaller numeric values are
displayed in data display mode, operation is performed normally.
1 FUJI PLC
•
1
Memory
TYPE
Remarks
M
(auxiliary relay)
0
WM as word device
K
(keep relay)
1
WK as word device
B
(input/output relay)
2
WB as word device
L
(link relay)
9
WL as word device
F
(special relay)
10
WF as word device (Read only)
TS
(timer/set value)
11
*
1
TR
(timer/current value)
12
*
1
W9
(timer/current value 0.1)
13
*
1
CS
(counter/set value)
14
*
1
CR
(counter/current value)
15
*
1
BD
(data memory)
16
*
1
WS (step control relay)
17
*
2
Wn
(file memory)
18
*
3
Содержание UG220H Series
Страница 270: ...Appendix Ladder Transfer Function...
