Programming IDEC SmartRelay
90
IDEC SmartRelay Manual
Calculating memory requirements
When calculating the memory requirements of a circuit, you
must always take all individual areas of memory into ac-
count.
Example:
The sample circuit program contains:
Hence, this circuit program fits into IDEC SmartRelay.
Block no.
Function
Memory area
Bytes
Blocks
REM
B1
OR
12
1
-
B2
AND
12
1
-
B3
Seven-day time switch
20
1
-
B4
On-delay
(1)
(1): Configured with retentivity.
8
1
3
B5
Stairwell Light Switch
12
1
0
B6
AND
12
1
-
Resources used by the circuit program
76
6
3
Memory space limits in IDEC SmartRe-
lay
2000
130
60
Still available in IDEC SmartRelay
1924
124
57
Q1
x
I2
B1
B2
B3
x
B4
–
20
No 1
No 2
No 3
I1
Par
B5
B6
Par
Q2
I3
I4
x
REM
Bytes
–
12
REM
Bytes
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