Process data
The EM37xx terminals offer the following process data per analog channel for transmission:
|
Value |
16 (bit) value, after passing through the process data chain |
|
Status |
16 (bit) status information |
Using the EM3702 (2 channels: 0 – 7.5 bar) as an example, the settings are explained below. The data apply to TwinCAT 2.11 from build 1544 onward and XML revision from EM37xx-0000-0016 onward.
Interpretation of value & status variable
The plain text display of the bit meanings of the Status word is particularly helpful not only in commissioning but also for linking to the PLC program.
By right-clicking on the Status variable in the configuration tree (A), the structure can be opened for linking (B).
In order to be able to read the it meanings in plain text in the online display (C), use the button "Show Sub Variables" (D) to display all subvariables and the structure content of the status word.
Display of the analog values for EM3701
The terminal module displays the analog input values as follows:
Differential pressure | Decimal [0.1 mbar] | Hexadecimal [0.1 mbar] |
|---|---|---|
-100 mbar | -1000 | 0xFC18 |
0 mbar | 0 | 0x0000 |
+100 mbar | +1000 | 0x03E8 |
Display of the analog values for EM3702
The terminal module displays the analog input values as follows:
Decimal [1 mbar] | Hexadecimal [1 mbar] | |
|---|---|---|
0 mbar | 0 | 0x0000 |
7500 mbar | 7500 | 0x1D4C |
Display of the analog values for EM3712
The terminal module displays the analog input values as follows:
Decimal [1 mbar] | Hexadecimal [1 mbar] | |
|---|---|---|
-1000 mbar | -1000 | 0xFC18 |
0 mbar | 0 | 0x0000 |
1000 mbar | 1000 | 0x03E8 |
Left-clicking on Value (A) results in graphic display of the online value (C) and the corresponding unit (B) in the Online tab.
