Siemens 353, Руководство пользователя

Страница: 192 / 246

Operation UM353-1B
April 2012 8-2
Priority:
•
Priority 1 causes the station bargraphs and event LEDs to flash and requires acknowledgment to stop
flashing. This is the highest priority.
•
Priority 2 also flashes the bargraphs but stops flashing when the event clears (i.e. Self Clearing).
•
Priority 3 causes the event LEDs L & S to flash and stops only when the event is acknowledged.
•
Priority 4 also causes the event LEDs to flash but stops when the event clears.
•
Priority 5 displays the event but does not require that it be acknowledged. This is the lowest priority.
If the event is in the active loop, the alphanumeric display will alternate between the loop tag and the
unacknowledged condition (e.g. ‘TC2053.P’ <---> ‘A3 HI’). Press the ACK button to acknowledge this
condition and stop the flashing.
The ACK button, after all events have been acknowledged, can then be used to scroll through any active alarm
or status conditions within the
Active Loop . Pressing the ACK button will scroll through the list of active
events and wrap around to the start of the list when more than one event is active. This function will time out if
the ACK button is not pressed for 3 seconds and return to the normal display mode.
If an unacknowledged event is not within the active loop, press the LOOP button to page through the loops.
•
D Pushbutton - changes the variable currently displayed. Pressing this pushbutton steps the display one
position in the sequence P, S, V, X and Y from any starting point within the display select group.
•
UNITS Pushbutton - displays the units of the variable shown in the alphanumeric display. When the button is
pressed the units that apply to the displayed variable will appear in the alphanumeric (e.g. ‘TC2053.P’ ‘deg F’,
‘TC2053.V’ ‘PRCT’). After 3 seconds, the alphanumeric display will return to the variable tag.
•
S
Bargraph - this vertical bargraph displays the scaled range of the controller setpoint in the Active Loop .
Bargraph height shows the setpoint as the % of range value. The setpoint in engineering units can be viewed
by pressing the
D
button to display the dot S parameter (e.g.
TC2053.S
).
•
P
Bargraph - this vertical bargraph displays the scaled range of the controller process in the Active Loop .
Bargraph height shows the process as the % of range value. The process in engineering units can be viewed by
pressing the
D button to display the dot P parameter (e.g. TC2053.P ).
•
Pulser Knob
- rotate the Pulser to change the value in the numeric display (e.g.
S
etpoint,
V
alve, or other
variable configured for normal operator display changes such as
R
atio,
B
ias). The Pulser knob is also used in
configuration to change values in the alphanumeric display.
An accelerator is included. Turning the knob faster multiplies the rate of change of the displayed parameter.
Large value changes then require fewer knob rotations.
•
V
Bargraph - this horizontal bargraph displays the scaled range of the controller output in the Active Loop. The
output/valve signal is shown as the % of range value. The value in engineering units can be viewed by pressing
the
D
button to display the dot V parameter (e.g.
TC2053.V
).
•
STORE Pushbutton (behind the flip-down door on the lower quarter of the faceplate) – activates display test
lighting all elements in the 6-digit numeric display, the 8-charactger alphanumeric display, the horizontal and
vertical bargraphs, and individual LEDs.