Configuring Your Gateway
PLX30 Series
User Manual
Ethernet and Serial Gateways
Page 28 of 200
ProSoft Technology, Inc.
September 19, 2012
The following illustration shows an example Data Map.
The following table describes the parameters for configuring the Data Map.
Parameter
Value
Description
From Address
0
to highest
Status Data
address
This parameter specifies the beginning internal database
register address for the copy operation. This address can be
any valid address in the
User Data Area
or the
Status Data
Area
of the gateway.
To Address
0
to
3999
This parameter specifies the beginning destination register
address for the copy operation. This address must always be
within the
User Data registers
area. A destination address
must be specified that will not overwrite data that has been
stored in memory by one of the communication protocols
running on the gateway.
Register Count
1
to
100
This parameter specifies the number of registers to copy.
Swap Code
No Change
Word Swap
Word and Byte
Swap
Byte Swap
The order of the bytes in the registers may need to be
swapped during the copy process in order to change the
alignment of bytes between dissimilar protocols. This
parameter is helpful when dealing with floating-point or other
multi-register values, as there is no standard method of
storage of these data types in slave devices.
No change:
No change is made in the byte ordering (1234 =
1234)
Word Swap:
The words are swapped (1234=3412)
Word and Byte Swap:
The words are swapped, then the
bytes in each word are swapped (1234=4321)
Byte Swap:
The bytes in each word are swapped
(1234=2143)
Delay Preset
This parameter sets an interval for each
Data Map
copy
operation. The value that is specified for the
Delay Preset
is
not a fixed amount of time. It is the number of firmware scans
that must transpire between copy operations.
