User manual

Page 54
PSI 9000 DT Series
www.elektroautomatik.de
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EA Elektro-Automatik GmbH
Helmholtzstr. 31-33 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
3.5 Remote control
3.5.1 General
Remote control is possible via the built-in analog interface, USB port or Ethernet port. Important here is that only the
analog or any of the digital interfaces can be in control. It means that if, for example, an attempt were to be made
to switch to remote control via the digital interface whilst analog remote control is active (Pin Remote = LOW) the
device would report an error via the digital interface. In the opposite direction, a switch-over via Pin Remote would
be ignored. In both cases, however, status monitoring and reading of values are always possible.
3.5.2 Control locations
Control locations are those locations from where the device is controlled. Essentially there are two: at the device
(manualoperation)andoutside(remotecontrol).Thefollowinglocationsaredened:
Displayed location Description
- If neither of the other locations is displayed then manual control is active and access from
the analog and digital interfaces is allowed. This location is not explicitly displayed
Remote Remote control via any interface is active
Local Remote control is locked, only manual operation is allowed.
Remote control may be allowed or inhibited using the setting “Allow remote control” (see „3.4.3.1. Menu “General
Settings”“). In inhibited condition the status “Local” will be displayed top right. Activating the lock can be useful if
the device is remotely controlled by software or some electronic device, but it is required to make adjustments at
the device or deal with emergency, which would not be possible remotely.
Activating condition “Local” causes the following:
• If remote control via the digital interface is active (“Remote”), then it is immediately terminated and in order to
continue remote control once “Local” is no longer active, it can be reactivated at the PC
• If remote control via the analog interface is active (“Remote”), then it is temporarily interrupted until remote control
is allowed again by deactivating “Local”, because pin “Remote” continues to signal “remote control = on”, unless
this has been changed during the “Local” period
3.5.3 Remote control via a digital interface
3.5.3.1 Selecting an interface
The device only supports the built-in digital interfaces USB and Ethernet.
For USB, a standard USB cable is included in the delivery, as well as a driver for Windows on USB stick. The USB
interface requires no setup in the MENU.
The Ethernet interface typically requires network setup (manual or DHCP), but can also be used with its default
parameters right from the start.
3.5.3.2 General
For the network port installation refer to „1.9.7. Ethernet port“.
Thedigitalinterfacerequirelittleornosetupforoperationandcanbedirectlyusedwiththeirdefaultcongura-
tion.Allspecicsettingswillbepermanentlystored,butcouldalsoberesettodefaultswiththesetupmenuitem
“Reset Device”.
Via the digital interface primarily the set values (voltage, current, power) and device conditions can be set and moni-
tored. Furthermore, various other functions are supported as described in separate programming documentation.
Changing to remote control will retain the last set values for the device until these are changed. Thus a simple
voltage control by setting a target value is possible without changing any other values.
3.5.3.3 Programming
Programming details for the interfaces, the communication protocols etc. are to be found in the documentation
“Programming Guide ModBus & SCPI“ which is supplied on the included CD or which is available as download
from the EA Elektro-Automatik website.