Local Faceplate Operation; Normal Operation Mode - Siemens 353 User Manual

UM353-1B

8.0 LOCAL FACEPLATE OPERATION

Controller operation is described in this section. Each faceplate display, pushbutton, and knob will be discussed
first in normal operation mode and then in configuration mode. This section contains many references to function
blocks. As necessary, refer to Section 3 for details about a function block.
Most operator controls are shown on the faceplate below. Several additional pushbuttons are located behind the
flip-down door at the bottom of the faceplate. These will be discussed in the configuration mode portion of this
section.

8.1 NORMAL OPERATION MODE

•
6-Digit Numeric Display - displays the numeric value of the
variable identified by the 8-character alphanumeric display.
Numbers can be displayed from 0.00000 to 999999 or -0.0000 to -
99999. Any input exceeding these limits will be shown as the
maximum or minimum displayable value and cause the display to
flash.
•
8-Character Alphanumeric Display - normally displays the loop tag
with the dot suffix of the variable currently showing in the 6-digit
numeric display (e.g. TC2053.P is the Process variable for loop
TC2053). A loop tag that is displayed is called the Active Loop and
all operator controls (e.g. PB1, PB2, A/M, ACK, D, UNITS,
ALARM, TUNE, TAG, QUICK) will affect the function blocks
within the Active Loop.
•
PB1 Pushbutton - controls the operation of the PB1SW (PB 1
transfer SWitch) function block when the block has been configured
for use within the Active Loop. See the function block details in
Section 3 for more information on PB1SW.
•
PB2 Pushbutton - controls the operation of the PB2SW (PB 2
transfer SWitch) function block when the block has been configured
for use within the Active Loop. See the function block details for
more information on PB2SW.
•
A/M Pushbutton - controls the operation of an A/M (Auto/Manual)
function block when the block has been configured for use within
the Active Loop. See the function block details for more
information on A/M. When the A/M is switched to Auto the
numeric display will show the Setpoint value, as indicated by .S in
the alphanumeric display, and when switched to Manual, the Valve
value and .V will be shown.
•
LOOP Pushbutton – selects the Active Loop when more that one loop has been configured. When more than
one loop has been configured, the LOOP button will advance the operator display to the next Active Loop. All
operator controls now affect the Active Loop that is currently shown in the alphanumeric display (e.g. FC2367).
When a loop is first displayed, the loop tag will appear in the alphanumeric and the displayed variable will be
the same as when the loop was last viewed.
•
ACK Pushbutton - this button is used together with the L and S status LEDs to manage events (e.g. alarm,
status, and error conditions) within the controller. Events have user assigned priorities 1-5 (with 1 the highest)
and will be organized within the controller, first by priority and then by order of occurrence.
•
S Status LED - Indicates that event is active (unacknowledged) in the Station. A flashing LED indicates
that the event needs to be acknowledged.
•
L Status LED - Indicates that event is active in the displayed Loop. A flashing LED indicates that the event
needs to be acknowledged.
April 2012
s
2 4 2 . 4 5 3
T C2 0 5 3 . P
S P
100
L
PB1
80 S
60
PB2
40
A
20
M
0
LOOP
100
0
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CLOSE
PAC 353
Operation
ACK
D
UNITS
OPEN
X03141S2
8-1