137
ERROR MESSAGES
ERROR MESSAGES
ERROR MESSAGES
ERROR MESSAGES
ERROR MESSAGES
OVERRANGE, UNDERRANGE AND SENSOR LEADS
OVERRANGE, UNDERRANGE AND SENSOR LEADS
OVERRANGE, UNDERRANGE AND SENSOR LEADS
OVERRANGE, UNDERRANGE AND SENSOR LEADS
OVERRANGE, UNDERRANGE AND SENSOR LEADS
BREAK DETECTION
BREAK DETECTION
BREAK DETECTION
BREAK DETECTION
BREAK DETECTION
ON THE MAIN INPUT
ON THE MAIN INPUT
ON THE MAIN INPUT
ON THE MAIN INPUT
ON THE MAIN INPUT
The device is capable to detect a fault condition on the main
input (OVERRANGE or UNDERRANGE or SENSOR LEADS
BREAK).
When the process variable exceeds the full scale value
programmed by "ñ.In.t" [C.d02], an OVERRANGE condition will
be shown on the upper display as show in the following figure:
When the process variable is lower than the initial scale value
programmed by "ñ.In.t" [C.d02], an UNDERRANGE condition
will be shown on the upper display as show in the following
figure:
In presence of an main input out-of-range condition, the control
outputs operate as follows:
a) When “SF.Cn” [C.G09] is set to “Std.”:
a.1) An OVERRANGE is detected and
- the device is set for one control output only, the output
will be forced to 0 % (if reverse action is programmed)
or to 100% (if direct action is programmed).
- the device has two control outputs, the “Main” output is
forced to 0 % and “Secondary” output is forced to 100%.
a.2) An UNDERRANGE is detected and
- the device is set for one output only, the output is
forced to 100 % (if reverse action is programmed) or
to 0 % (if direct action is programmed).
- the device has two control outputs, the “Main” output
is forced to 100 % and “Secondary” output is forced
to 0 %
b) With “SF.Cn” [C.G09] set to “Ov.Un”, when an overrange or
an underrange condition is detected, the power output is
forced to the safety value “SF.UL” [C.G10].
c) When “SF.Cn” [C.G09] is set to “OvEr”
c.1) if an overrange condition is detected, the power output
is forced to the safety value “SF.UL” [C.G10]
c.2) if an underrange condition is detected the instrument will
operate as described at point a.2).
XKP-1-D1.pmd
25/05/2006, 11.28
137
