Memory requirements

The blocks in your circuit program require a certain amount of memory space. The table shows you how much of the memory space each block occupies.

Memory space required for data backup after power failure is specified in the "Rem" column (retentivity enabled).

 

Block

RAM
(Bytes)

Rem
(Bytes)

AND (with/without Edge Detection)

12

-

NAND

12

-

OR (with/without Edge Detection)

12

-

NOR

12

-

XOR

8

-

NOT

4

-

On delay

8

3

Off delay

12

3

On/off delay

12

3

Retentive on delay

12

3

Interval time-delay relay

8

3

Edge-triggered interval time-delay relay

16

4

Asynchronous pulse generator

12

3

Random generator

12

-

Stairwell Light Switch

12

3

Dual-function switch

16

3

Seven-day time switch

20

-

Twelve-month time switch

12

-

Up/down counter

28

5

Operating hours counter

28

9

Analog trigger

16

-

Analog trigger

16

-

Analog differential trigger

16

-

Analog comparator

24

-

Analog value monitoring

20

-

Analog amplifier

12

-

Pulse width modulator (PWM)

24

-

Analog math

20

-

Analog math error detection

12

1

Latching relay

8

1

Current impulse relay

12

1

Message text

8

-

Softkey

8

2

Analog multiplexer

20

-

PI Controller

40

2

Analog ramp control

36

-

Shift register

12

1

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FL1A-FL1B: The following specifications apply:

The blocks in your circuit program require a certain amount of memory space. The table below shows you how much memory space the blocks use in the various memory areas:

 

Block

Par

RAM

Timer

REM

Basic functions

0

0

0

0

On delay

1

1

1

0

Off delay

2

1

1

0

On/off delay

2

1

1

0

Retentive on delay

2

1

1

0

Interval time-delay relay

1

1

1

0

Edge-triggered interval time-delay relay

1

1

1

0

Symmetrical clock pulse generator

1

1

1

0

Asynchronous pulse generator

3

1

1

0

Random generator

2

1

1

0

Stairwell Light Switch

1

1

1

0

Dual-function switch

2

1

1

0

Seven-day time switch

6

2

0

0

Twelve-month time switch

2

0

0

0

Up/down counter*

2

(2)

0

(2)

Operating hours counter

2

0

0

4

Frequency trigger

3

3

1

0

Analog trigger

4

2

0

0

Analog comparator

3

4

0

0

Latching relay*

0

(1)

0

(1)

Current impulse relay *

0

(1)

0

(1)

Message texts

1

0

0

0

Softkey*

1

(1)

0

(1)

 

*: Depending on whether the function is configured with or without retentivity, it occupies the following memory space:

Here you will find information on memory space provide by IDEC SmartRelay.