Hello guys,

Can I used S7-1200 with IM155-6 using 6ES7 134-6TD00-0CA1 module to do loop multidrop HART?

It will be using 3-4 level transmitter in 1 channel. I cannot find any documentation for the configuration on Step 7. I need to know how the address located on each sensor.

Thank you.

thank you for the respond,

btw i'm using Krohne Optiwave 7300C and yes there is hart address to configure. I understand how the point to point HART worked and how to showed PV, SV, TV or QV data in PLC.

I'm just wondering how it will be done if I using multidrop mode. Will the data shifting from one sensor to the next sensor? because there is no hart address configuration in the card. 

With the hart communicator, how will the data going if we use hart multidrop mode?

The unadvertised mystery secret of HART multidrop and HART Multiplex is the software that operates the HART polling.

[snip]

A. HART multidrop

HART multidrop can be either
- paralleled multidrop transmitters with a HART modem as the link to the PC/SCADA/HMI 'control/operations' system.
- paralleled multidrop transmitter with a gateway that polls the HART devices, saves the data in registers that are Modbus accessible on the other side of the gateway.  The PC/HMI/SCADA then gets the data via Modbus

B. HART multiplexors

I've read of two versions of HART multiplexors (MUX)

1.  Current output of the field instruments are wired in series to both the Mux analog input and to the control system analog input.

The control system analog input is used for control
Mux provides the HART variables as Modbus values to SCADA/HMI

2.  Current output of field instruments are wired to the MUX and the MUX read each input in sequence, providing the HART variable as Modbus values.

[snip]

C. Break-out modules

There are several break-out modules (DIN rail mount, 24Vdc powered, which act as a HART master to read one instrument's HART variables and break them out as three or four individual analog signals, voltage or current.  Gets all the HART variable data without the cost of HART enabled AI's or any software whatsoever.

D. HART enabled analog inputs

As far as I can tell, the expensive HART enabled analog inputs are used by PLC's or DCS with a HART modem on each analog input.  The HART variables are assigned tags and are updated about every 2 seconds.

If there is pass-through functionality, then the diagnostic information can be retrieved via an Asset Management program (typical $20,000 USD).

E.  HART server
There is something called HART server that is licensed by HART.  I have failed to find the definition of what it is or what it does.  You might stumble on it, and if you find the definition, you've found something worth reading.