E5CC-800

5

Alarm Outputs

Each alarm can be independently set to one of the following 19 alarm types. The default is 2: Upper limit. (see note.)

Auxiliary outputs are allocated for alarms. ON delays and OFF delays (0 to 999 s) can also be specified.

*1

With set values 1, 4 and 5, the upper and lower limit values can be set

ndependently for each alarm type, and are expressed as “L” and “H.”

*2

Set value: 1, Upper- and lower-limit alarm

*3

Set value: 4, Upper- and lower-limit range

*4

Set value: 5, Upper- and lower-limit with standby sequence

For Upper- and Lower-Limit Alarm Described Above *2

• Case 1 and 2

Always OFF when the upper-limit and lower-limit hysteresis overlaps.

• Case 3: Always OFF

*5. Set value: 5, Upper- and lower-limit with standby sequence

Always OFF when the upper-limit and lower-limit hysteresis overlaps.

*6

Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No. H174)

for information on the operation of the standby sequence.

*7

Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No.H174)

for information on the loop burnout alarm (LBA).

*8

Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No. H174)

for information on the PV change rate alarm.

*9

When heating/cooling control is performed, the MV absolute upper limit

alarm functions only for the heating operation and the MV absolute lower

limit alarm functions only for the cooling operation.

Set

value

Alarm type

Alarm output operation

Description of function

When alarm value

X is positive

When alarm value

X is negative

0

Alarm function OFF

Output OFF

No alarm

1

Upper- and lower-limit *1

*2

Set the deviation in the set point by setting the alarm upper

limit (H) and alarm lower limit (L). The alarm is ON when the

PV is outside this deviation range.

2

Upper-limit

Set the upward deviation in the set point by setting the alarm

value (X). The alarm is ON when the PV is higher than the SP

by the deviation or more.

3

Lower-limit

Set the downward deviation in the set point by setting the

alarm value (X). The alarm is ON when the PV is lower than

the SP by the deviation or more.

4

Upper- and lower-limit

range *1

*3

Set the deviation in the set point by setting the alarm upper

limit (H) and alarm lower limit (L). The alarm is ON when the

PV is inside this deviation range.

5

Upper- and lower-limit with

standby sequence *1

*4

A standby sequence is added to the upper- and lower-limit

alarm (1). *6

6

Upper-limit with standby

sequence

A standby sequence is added to the upper-limit alarm (2). *6

7

Lower-limit with standby

sequence

A standby sequence is added to the lower-limit alarm (3). *6

8

Absolute-value upper-limit

The alarm will turn ON if the process value is larger than the

alarm value (X) regardless of the set point.

9

Absolute-value lower-limit

The alarm will turn ON if the process value is smaller than the

alarm value (X) regardless of the set point.

10

Absolute-value upper-limit

with standby sequence

A standby sequence is added to the absolute-value upper-lim-

it alarm (8). *6

11

Absolute-value lower-limit

with standby sequence

A standby sequence is added to the absolute-value lower-limit

alarm (9). *6

12

LBA (alarm 1 type only)

-*7

13

PV change rate alarm

-

*8

14

SP absolute value

upper limit

This alarm type turns ON the alarm when the set point (SP) is

higher than the alarm value (X).

15

SP absolute value

lower limit

This alarm type turns ON the alarm when the set point (SP) is

smaller than the alarm value (X).

16

MV absolute value

upper limit *9

This alarm type turns ON the alarm when the manipulated

variable (MV) is higher than the alarm value (X).

17

MV absolute value

lower limit *9

This alarm type turns ON the alarm when the manipulated

variable (MV) is smaller than the alarm value (X).

ON

OFF

PV

SP

LH

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

SP

LH

ON

OFF

PV

SP

LH

ON

OFF

PV

*5

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

SP

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

PV

0

X

ON

OFF

SP

0

X

ON

OFF

SP

0

X

ON

OFF

SP

0

X

ON

OFF

SP

0

X

ON

OFF

MV

0

X

ON

OFF

MV

0

X

ON

OFF

MV

0

X

ON

OFF

MV

LH

H<0, L>0

|H| < |L|

SP

Case 1

LH

H>0, L<0

|H| > |L|

SP

Case 2

L

H

H<0, L<0

SP

L

H

H<0, L>0

|H| ≥ |L|

SP

L

H

H>0, L<0

|H| ≤ |L|

SP

Case 3 (Always ON)

LH

H<0, L>0

|H| < |L|

SP

Case 1

LH

H>0, L<0

|H| > |L|

SP

Case 2

L

H

H<0, L<0

SP

L

L

H

H<0, L>0

|H| ≥ |L|

SP

H

H>0, L<0

|H| ≤ |L|

SP

Case 3 (Always OFF)