WAGO-I/O-SYSTEM 750
Operating Modes
57
750-484 2 AI 4-20 mA HART Ex i
Manual
V 1.2.0 HW-Version 04, SW-Version 03
PV
=
first Variable
(Primary Variable),
SV
=
second Variable
(Secondary Variable)
TV
=
third Variable
(Tertiary Variable)
,
QV
=
fourth Variable
(Quarternary Variable)
*)
Default value
Selection Parameters for 75x-482 2AI/4-20 mA/SE/ Ex i
Table 37: Parameter Data for Acyclic Access
Parameter
Value
Description
Acyclic
access to the
HMDs
- Disabled
*)
- 12 Byte Mailbox
- Acyclic access to the HMDs (HART
Master Devices) is deactivated
- 12-byte mailbox for acyclic access
activated
*)
Default value
9.2
FDT/DTM Concept
FDT is an abbreviation for “Field Device Tool”. This is frame application
software, which can be used to parameterize, configure and control fieldbus
devices separately from the specific communication technologies of the different
fieldbusses.
In order to establish communication with the individual devices in an FDT
application and from there to be able to access the adjustable device parameters,
the application requires an addition in the form of a software component for each
field device.
The specific functions and dialogs of a field device for parameterization,
diagnosis and maintenance, including the user interface, are reproduced in such a
software component, which is referred to as a DTM (Device Type Manager).
Comparable with device driver software, the DTM is supplied with the device by
the device manufacturer and installed on the PC by the user. The DTM is
subsequently loaded into the FDT frame application from where it is executed.
FDT/DTM is an open concept, which encourages a uniform operating concept
within an overall control program in which individual components from different
manufacturers can work together.
WAGO provides a simple and convenient FDT frame application in the form of
the “759 370 WAGOframe FDT Frame Application” software.