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EA Elektro-Automatik GmbH
Helmholtzstr. 31-37 • 41747 Viersen
Germany
Fon: +49 2162 / 3785-0
Fax: +49 2162 / 16230
www.elektroautomatik.de
PSI 9000 DT Series
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 ei-
ther 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 can be controlled. Essentially there are two: at the
device (manual operation) and outside (remote control). The following locations are defined:
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 isn’t explicitly displayed
Remote
Remote control via any interface is active
Local
Remote control is inhibited, only manual operation is allowed.
Remote control may be allowed or inhibited using the setting
“Allow remote control”
). In inhibited condition the status
“Local”
will be displayed in the status area of the display. Activating
the lock can be useful if the device is remotely controlled by software or some electronic device, but it’s required
to make adjustments at the device or deal with emergency, which would not be possible remotely. This implies
to remote control can be interrupted on the HMI which is done by tapping it anywhere, which causes a two-stage
request of which the second stage is very important in the situation of analog remote control. Activating condition
“Local”
causes the following:
•
If remote control via the digital interface is active (“
Remote
”), then it’s 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” is no longer active, it can be reactivated at the PC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’s 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
The digital interfaces require little or no setup for operation and can be directly used with their default configura
-
tion. All specific settings will be permanently stored, but could also be reset to defaults with the setup menu item
“Reset Device”.
Via the digital interfaces 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 a separate programming documentation.
Switching to remote control will retain the last set values of the device until these are changed by command.
3.5.3.3
Programming
Programming details for the interfaces, the communication protocols etc. are found in the external documentation
“Programming Guide ModBus & SCPI“ which is supplied on the included USB stick or is available as download
from the EA Elektro-Automatik website.
Содержание PSI 9000 DT Series
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