Table of Contents
Advertisement
WAGO I/O System 750
753-482 2AI 4-20mA 12 Bit S.E. HART
A Boot-Project for HART functionality is necessary!
In order to be able to use the HART functionality, a special boot project for
Ethernet controllers must be loaded into the ETHERNET Controller 750-841.
You can download this boot project and more detailed information relating to it
on the WAGO website at:
www.wago.com → Support → Additional documentation and information on
automation products → Application Notes, under the number: "A116101".
The device driver "ModbusTCP/HARTGatewayDTM 759-359" is available for the
convenient FDT/DTM frame application "WAGOframe", which makes it possible
to access the DTM of the connected HART device directly from this application.
Additional Information about "WAGOframe" and
"ModbusTCP/HARTGatewayDTM"
The FDT/DTM frame application "WAGOframe" can be ordered under Item No.:
759-370; the free "ModbusTCP/HARTGatewayDTM 759-359" can be
downloaded from the WAGO website at:
www.wago.com → Support → Additional documentation and information on
automation products
9.2.1
Communication on 750-841 via FDT/DTM
The "ModbusTCP/HARTGatewayDTM 759-359" and the DTM for the connected
HART sensor are embedded in the WAGOframe FDT/DTM frame application.
Communication from the WAGOframe FDT/DTM frame application to the
connected HART sensor takes place in three phases:
1
The DTM of the HART field device first creates a HART telegram. This is
received by the WAGO ModbusTCP/HARTGatewayDTM and packed into a
Modbus telegram. This is then sent to the 750-841 by means of the
Modbus TCP communications DTM.
2
The Controller 750-841 acts as a gateway.
It receives the Modbus telegram, removes the HART telegram from the
Modbus telegram and transfers it via the mailbox, which is incorporated into
the process image of the controller. This mailbox data is then used to
forward the commands to the HART I/O module by means of the local bus
(KBUS).
3
The HART I/O module receives the HART telegram via the mailbox and
passes it on to the HART field device.
Commissioning
67
Manual
Version 1.2.0
Advertisement
Table of Contents
