7. Internal Web pages
Issue 06/15 Publication PUB059-002-00 101 of 136
wired devices and 60 wireless devices (as shown in Fig 66), the
lowest wireless address would be set to 181.
Total FCU’s
expected on
this option
card
The total number of field units that are expected to be found on this
network associated with this module. The master station will expect
to find this number of field units on the network starting at the address
set.
Total Wireless
Repeaters
expected on
this option
card
The total number of P3W Repeaters that are expected to be found on
the network associated with this module. There can be a maximum of
15 P3W repeaters fitted to a wireless network.
The PAN ID is the Personal Area Network Identification number of the
network attached to this option module. For a device to connect to
the master station it must have a PAN ID the same as the master
station. The default value is DA 15 and the range is 00 00 to Hex FF
FF. Where there are multiple networks in close proximity, the PAN
IDs should be set to unique numbers.
Retain Data on
Loss of
Communicatio
n
Normally the database information about an actuator is cleared to
zeros if communication with the actuator is lost. This ensures that the
false valve position information is not transmitted to the host system
during the loss of communication. A single ‘Comms Fail’ data bit is
set. This system setting allows the data to be kept at the last value
received from the actuator. Note that the data is retained indefinitely
and does not necessarily reflect the true actuator status.
Pakscan wireless employs the Advanced Encryption Standard (AES)
as a method of protecting the command messages to devices on the
network. The AES key must be the same on all devices on the
network and the master station. To protect the commands the AES
key should be kept secret. The AES key is a 128bit hexadecimal
value, if a device does not have the same AES key as the master
station, it will not be able to be commanded by the master station.
The range of frequencies in the 2.4GHz band over which the Pakscan
wireless network communicates is split into channels. Some
countries will not accept communication over certain frequencies.
Therefore, the country code chosen in the general settings will ensure
that the channels available to be selected using this drop-down box
are only those that are legal.
Third party
devices fitted
Using a P3W Modbus Adapter (WMA) it is possible to connect other
manufacturers’ devices into the Pakscan Wireless network. If ‘yes’ is
selected in the drop-down box and the setting is saved, the web page
will change to show the following:
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