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Iii-8.6 alarm ( alarm processing (no. 45) ) 153, Alarm 153, Alarm processing 153 – West Control Solutions KS98-1 User Manual

Page 153: Iii-8.6 alarm ( alarm processing (no. 45) )

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III-8.6

ALARM ( alarm processing (No. 45) )

x1 is checked for a lower and an upper alarm value. Additionally, digital alarm input fail can be used. Configura-
tion parameter

Fnc can be used to select which signal shall be monitored (x1, x1 + fail or fail).

With input

stop = 1, alarms (fail and x1) are suppressed. After removal of this signal, suppression lasts, until

the monitored value is again within the limits. This can be used e.g. for suppressing an alarm message with change.

During value change at the exit

xw

sup a pulse with the length of a
scanning cycle Ts is sent.

Inputs/outputs

Digital inputs

fail

Digital alarm signal e.g. fail signal of AINP

stop

stop = 1, alarms (fail and x1) are suppressed. After stop returned to 0, suppression lasts, until the
monitored value is again within the limits.

Analog input

x1

Input variable to be limited

Digital output

alarm

Alarm status: 0 = no alarm; 1= alarm

Configuration parameter:

Parameter

Description

Range

Default

Fnc

Alarm function

only

x1 is monitored

Mes.val.X1

t

x1 and fail are monitored

X1 + fail

only

fail is monitored

fail

Parameters:

Parameter

Description

Range

Default

LimL

lower limit for the alarm

-29 999 ... 999 999

-10

LimH

upper limit for the alarm

-29 999 ... 999 999

10

Lxsd

Switching hysteresis Xsd

0 ... 999 999

10

Limit value signalling and limiting

9499-040-82711

III-153

ALARM ( alarm processing (No. 45) )

stop

fail

LimL
LimH

Xsd

x1

Fnc

alarm

Fig. 16 Alarm suppression with change