22

Digital Controller

E5AK/E5EK

■ Alarm Mode Selectors

Alarm outputs are available if they are allocated as outputs. Factory setting is “2: Upper-limit alarm (deviation).”

Deviation Alarm

If the alarm mode selector is set to a number between 1 to 7, alarm

values are set to the width deviated from the set point as shown in

the following illustration.

Absolute Alarm

If the alarm mode selector is set to 8 or 9, alarm values are set to the

absolute value based on 0

°C/°F as shown in the following illustration.

When selecting a control method, refer to the following table for cor-

rect parameter setting.

Switch

setting

Alarm operation

Alarm output

When X is positive

When X is negative

1

Upper- and lower-limit alarm (deviation)

Always ON

2

Upper-limit alarm (deviation)

3

Lower-limit alarm (deviation)

4

Upper- and lower-limit range alarm (deviation)

Always OFF

5

Upper- and lower-limit alarm with standby se-

quence (deviation)

Always OFF

6

Upper-limit alarm with standby sequence (devia-

tion)

7

Lower-limit alarm with standby sequence (devia-

tion)

8

Absolute-value upper-limit alarm

9

Absolute-value lower-limit alarm

10

Absolute-value upper-limit alarm with standby se-

quence

11

Absolute-value lower-limit alarm with standby se-

quence

XX

ON

OFF

SP

X

SP

ON

OFF

X

SP

ON

OFF

X

SP

ON

OFF

X

SP

ON

OFF

XX

SP

ON

OFF

XX

SP

ON

OFF

X

SP

ON

OFF

X

SP

ON

OFF

X

SP

ON

OFF

X

SP

ON

OFF

X

0

ON

OFF

0

X

ON

OFF

X

0

ON

OFF

0

X

ON

OFF

X

0

ON

OFF

0

X

ON

OFF

X

0

ON

OFF

0

X

ON

OFF

10

°C/°F

110

°C/°F

Alarm value

Set point (SP)

100

°C/°F

0

°C/°F

110

°C/°F

110

°C/°F

Alarm value

Control

method

Control output

1 assignment

Control output

2 assignment

Operation

Heat

Control output

(heat)

---

Reverse

Cool

Control output

(heat)

---

Direct

Heat/Cool

Control output

(heat)

Control output

(cool)

Reverse