Despatch P1400+ Temperature Controller User Manual
Page 83
77
Input Span
Type: General Definition
The measuring limits, as defined by the Scale Range Lower and Scale Range Upper Limits. The
trimmed span value is also used as the basis for calculations that relate to the span of the
instrument (E.g. controller proportional bands)
Also refer to
Input Range
,
Scale Range Lower Limit
and
Scale Range Upper Limit
.
Integral
Type: Controller Tuning Parameter
Refer to
Automatic Reset
.
Latching Relay
Type: General Definition
A type of relay that, once it becomes active, requires a reset signal before it will deactivate. This
output is available on Limit controllers and indicator alarms. To successfully deactivate a latched
relay, the alarm or limit condition that caused the relay to become active must first be removed, then
a reset signal can be applied. This signal may be applied from the instrument keypad, Digital Input
or command via Serial Communication.
Also refer to
Alarm Operation
,
Indicator
,
Limit Controller
,
Limit Hysteresis
,
Serial
Communications
.
LED
Type: General Definition
Light Emitting Diode. LED’s are used as indicator lights (e.g. for the alarm indication). The upper and
lower 7-segment displays are also LED’s.
Lock Codes
Type: General Parameter
Defines the four-digit codes required to enter Configuration (20), Set-Up (10), and Auto Tuning (0)
modes.
Display codes =
cLoc
,
SLoc
and
tLoc
, default values shown above in brackets.