20
8.6.4.
Inverted window alarm type
Fig. 8.8
When the parameter
tYPE
value is
7__g
, the parameter tree becomes the same as that for
the window type alarm. The parameters have the same meaning. The only difference is in the static
correspondence between alarm input and alarm state (Fig. 8.8).
8.7.
Limitations of alarm programming
These are limitations concerning unacceptable correspondence among parameters or among parameters
and measured input value limit. If such a limitation is violated, at an attempt to finish current alarm parameter
programming, one of the following
FL
messages is displayed:
inP
- alarm is assigned to an input that is not enabled. Assign the alarm to another input or configure
this input as enabled (used) – see chapter 7.
lGWH
- for window or inverted window alarm type, the lower limit is higher than upper limit. Correct one
of the limits or interchange their values.
rnfL
- alarm limit is lower than the lowest measurable input value. Increase the
AlL
or
LOL
value.
rnfH
- alarm limit is higher than the highest measurable input value. Decrease the
AlL
or
LOL
value.
HYSt
- alarm limits are inside the measurable range but the hysteresis value is outside the input
measurement range. Decrease hysteresis value or change an alarm limit.
9. PROGRAMMING OF THERMOCOUPLE COLD-JUNCTION
TEMPERATURE DEFAULT VALUE
This parameter is accessible from normal operation mode and only if the device has at least one thermocouple
input. To display the parameter, press
&
. The value of this parameter is used in the very rare cases of
cold-junction temperature sensor failure. The sensor is located near the back-panel input terminals.
parameter
sc
PARAMETER
MIN.
MAX.
UNIT
DEFAULT
sc
-2)0
10)0
C
2%0
The access to this parameter may be restricted as described in chapter 6.2. If change is not allowed,
the parameter would be only visible to read. At an attempt for changing the parameter on a TC800 without
thermocouple inputs, the device displays the
no yxin
message.