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CDA PC44 Instruções de Operação Página 47

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Remote Memory Selection
and
Memory
Logic
Remote Memory Select Switch
Installation
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Installation 3·25
The logic levels should be held continuously. Remote selection will take
place after the levels have been there for
at
least
500
ms
.
If
you try
to
select a non-configured memory, the current memory
remains in effect and
the
PC40 status LED will light red. The LED will
stay on until you select a configured memory
or
configure the memory
you were attempting
to
select.
When the
PC40 senses a remote memory selection, the unit checks
to
see
if
any patterns are in progress. If
no
patterns
are
in progress, the
memory change
will take place. However,
if
a pattern is in progress, the
memory change
will be inhibited
unt
il all patterns are completed.
Table
3
.1
0 shows the logic that is used to select a memory. Logic OFF
or
ON
refers
to
the state
of
the device connected
to
PC40 terminal
block
P1
(pins 5,
6,
and 7). The device can be NPN
or
PNP depending
on how
P1-3 is wired (refer
to
the comments for P1-3
in
Table 3.9).
Table
3.
10
- Remote Memory Select Logic
Selection P1-5 P1-6 P1-7
Remote Disabled Off Off
Off
Memory A
Off Off On
Memory B Off
On Off
Memory C Off On On
Memory D On Off Off
For Future Use On Off
On
For Future Use
On On
Off
For Future Use On On
On
NOTE: This switch is not intended to be installed in the PC40.
It
can be
mounted on a remote panel,
etc
.
The Nordson Remote Memory
Select Switch is a 4-position, rotary
switch that enables you
to
remotely select
wh
ich PC40 memory is
active.
1.
Secure the switch
to
the mounting surface.
2.
If
you have not already done so, temporarily mount
the
front
assembly to the back enclosure by doing the following:
a. Loosen the six screws on the front assembly.
b. Remove the two top screws (Figure 3.5).
c. Rotate the front assembly
180" (Figure 3.
6)
.
d.
Push
the
two screws through the top two front assembly holes
(Figure 3.7, view A).
e.
Insert the two screws into the two back enclosure stand-offs
(Figure 3.7,
view
A.)
PIN
108
389A
57·28 1/93
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