Peaktronics 92 Series User Manual

14
parameter is less than or equal to the aux open setting
minus 1%. The aux open position can also be set from the
DHC control panel using the AUX OPEN OUTPUT mode.
In the following example, the parameter is changed
via the bus to $1D29 (7465 decimal), which is a setting of
74.65%. Bit 6 of Alarm Flags is set to "1" when Position
is 74.66% or more, and bit 6 is set to "0" when Position is
73.65% or less.
PACS
®
Command (CD#D2,7465):
82 00 D2 1D 29
The parameter can be read as shown below:
PACS
®
Command (RD#00D2):
51 00 D2
Returned Data (example):
1D 29
PACS
®
COMMAND INPUT
00D8 DOUB
The PACS
®
Command Input parameter is a
DOUB byte value that is used to control the position of the
valve via the bus. The value ranges from 0 to 10000 and
represents 0% to 100% open. The parameter can be written
at anytime as shown in the example below. The value of
$11DF (4575 decimal) represents a command signal of
45.75% open. When writing values greater than 10000
(2710 hexadecimal), the DHC automatically limits the
value to 10000.
PACS
®
Command (CD#D8,4575):
82 00 D8 11 DF
The parameter can be read at anytime as shown below:
PACS
®
Command (RD#00D8):
51 00 D8
Returned Data (example):
11 DF
The DHC controller will use the PACS
®
Command Input parameter instead of the Analog
Command Input parameter (see Section II) when it is
configured to do so. Before the DHC uses the PACS
®
Command Input parameter, the PACS
®
Timeout Setting
parameter must be set via the bus. If the timeout setting is
zero when the PACS
®
Command Input parameter is
written to a DHC-400 controller, the DHC-400 will
automatically set the timeout value to 4 (2 seconds).
The DHC can be configured in two ways to use the
PACS
®
Command Input parameter. First, the DHC can
be configured for a Digital command type from the DHC
control panel using the COMMAND TYPE mode. In this
case, the DHC controller ignores the analog input signals
and will wait for a command from the bus, being the
PACS
®
Command Input parameter.
In the second configuration, the DHC is configured
for one of the analog command types, and the bus can
override the analog command. In this case, the PACS
®
Control Register parameter must also be configured, via
the bus, to override the analog signal.
The PACS
®
Command Input, PACS
®
Timeout
Setting, and PACS
®
Control Register parameters are not
saved in non-volatile memory. This means that the
parameters' values are lost when the DHC controller loses
power, or is reset using the PACS
®
Reset parameter.
Following a power up or reset condition, the DHC sets
these parameters to zero. Therefore, it may be desirable to
use the PACS
®
Control Register parameter to detect when
a power down condition has occurred.
PACS
®
CONTROL REGISTER
00ED SING
The PACS
®
Control Register parameter is a
SING byte value, where groups of bits are assigned to
various DHC controller functions. The bit assignments are
shown below:
7 6 5 4 3 2 1 0
X
command override control
X X
PACS
®
manual control
X
unassigned
X X
set loss of command
X
unassigned
X
power monitor
The parameter can be written at anytime as shown
in the following example, where $80 (1000 0000 binary)
sets bit 7 ("power monitor") to "1" and bits 0 to 6 to "0".
PACS
®
Command (CS#ED,#80):
62 00 ED 80
The parameter can be read at anytime as shown below:
PACS
®
Command (RS#00ED):
50 00 ED
Returned Data (example):
80

Peaktronics 92 Series Specifications

General

Brand	Peaktronics
Model	92 Series
Category	Controller
Language	English