4 connection - summation – VEGA SOLITRAC 31 Profibus PA User Manual

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5 Connecting to power supply

SOLITRAC 31 • Profibus PA

43834-EN-131119

5.4 Connection - Summation

To measure the level in very high vessels, multiple instruments can be

cascaded.
Cascading means that two or several instruments are connected

which can together cover a longer measuring range.
The instrument acts as Master and all other instruments operate as

Slaves.
The pulse rates of all instruments are summed in the Master instru-

ment and converted into a common signal.
The Master instrument must have the function "Level". For this

purpose, select under the menu item "Setup/Application" the function

"Level".
Set the address setting (MGC) on the Master instrument to "0 - 0".
For this purpose, the Slave instruments must be defined as "Slave".

Select under the menu item "Setup/Application" the function "Sum-

mation Slave".
The address setting (MGC) on the Slave instruments can be freely

selected. Only the address "0 - 0" is reserved for the Master instru-

ment.
Connect the instruments according to the following wiring plan:

Electronics and connec-

tion compartment - sum-

mation