Banner SureCross DX80 Wireless Networks - Manual (Page 38)

Custom
Regis-
ters En-
abled The Custom Registers Enabled parameter con-
trols how many maps are enabled and dis-
played.
Delete
and In-
sert Clicking the Delete button removes the rule or
map number shown in the Rule # or Map # box.
Clicking the Insert button inserts a new map
ahead of the map number shown. It is not nec-
essary to use the Insert button to add maps to
the bottom of the list or to define any rule with
None as the register type. To add a map/rule to
the bottom of the list, increase the number of
rules or maps enabled.
Exclu-
sivity Enter the number of Modbus registers available
in your customized register mapping and select
the User Map Enabled checkbox to begin using
a customized map. Select the Map is Exclusive
checkbox if the access to registers outside this
map is prohibited. If the Map is Exclusive
checkbox is not selected, all local registers not
overlapped by the custom map will be accessi-
ble to the remote client.
Local
Register
Number The Local Register Number is the source of the
data.
Mapped
Register
Format Select the mapped register format: integer, un-
signed, double, float, or bit. An integer is a 16-
bit (signed) number, an unsigned format is a
16-bit unsigned number, double refers to a dou-
ble precision (32-bit) value, a floating value is a
floating point number, and a bit value is a single
bit that can either be a 0 or a 1 (discrete value.)
Selecting None for the register format negates
the rule even though it continues to appear in
the list until deleted. Unused rules at the end of
the list always show None as the mapped regis-
ter format.
Mapped
Register
Number The mapped register number is the destination
register for the data to be copied to.
Name The name is optional and only used for display
purposes.
Prev
and
Next If there are more than 16 devices or rules/maps,
use the Prev and Next buttons to display the
next screen of information.
Scale
Factor
and Off-
set Optional fields, the Scale Factor and Offset val-
ue work together to convert register data. The
source data is multiplied by the scale factor and
added to the offset to produce the data in the
mapped server register.
Swap-
ping By default, double registers in the DX80 are “big
endian;” the most significant bytes are in the first
register and least significant bytes are in the
second register. If remote clients accessing this
server at this IP address expect “little endian,”
select the Swap Double Registers checkbox.
Modbus protocol by definition is “big endian”
within each register, but the “endian” order of the
registers for 32-bit values is less standardized.
Update Clicking the Update button sends information to
the Ethernet Bridge or GatewayPro or retrieves
information depending on which checkboxes are
selected: Change or Get/Send All. Updating in-
formation does not save configuration informa-
tion permanently to the XML file.
Zero
Fill Normally an attempt to read an undefined regis-
ter returns an exception (error) code. To enable
reading of large data packets without nuisance
errors, zero filling null registers so that reading
an undefined register between valid defined reg-
isters returns zero data rather than an error.
System Tab
The System tab contains system-wide settings and functions including system-level register information, data manipulation and calcula-
tions, and network set up instructions.
Data Submenu
The Data submenu accesses system-level register information.
Local Registers
The Local Registers tab displays the data in the local registers maintained by the GatewayPro or Ethernet Bridge.
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