P3F - Pakscan Master Station Technical Manual
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Publication S703E V1.1
Issue 06/09
5.6.2
Option Module Set-up (including host comms protocols)
The master station set-up page is also used for setting up the Pakscan 2 Current Loop Option card.
Set the loop performance parameters in accordance with the data recorded earlier. Make sure the
loop speed is compatible with the setting for the loop capacitance.
Set the highest field unit address parameter equal to the actual highest address.
Doubling can be set to ‘On’ if the loop performance is not fast enough. It has the effect of halving the
time to collect data from the field units.
DV Convert should be set to ‘On’ if position control is being used on the IQ, IQT, Skil or EH actuators
on the network.
Data Retain set to ‘Off’ clears all the field unit data if communication is lost. Some host systems want
the data to be retained, in which case set the parameter to ‘On’.
The communications protocols are also set on this page. Select the desired host protocol on each
serial communications port and the Ethernet ports for access to the actuators on the current loop.
Once the settings are as required, they must be downloaded to the master station CPU module. Click
on
save settings
and wait for the web page to refresh before moving to the next task.
5.6.3
Host Port Settings
The physical parameters relating to the serial ports that may be altered are set by accessing the
Host
Port
page.
Fig 62: Host Port Set-up page
