II - DCE FEL ČVUT v Praze

SIMATIC S7 HART Analog Modules
HART
measurement type
4-12
If you have activated the HART measurement type for a channel and HART
communication is running, the green HART status display lights up. When
HART starts up, the HART analog module transmits the HART command 0
to the field device, followed by HART command 13. The resulting HART
response data (for example “long frame” address and “tag”), are entered in
the diagnostic data record 131 or 151, see Section 4.8.4. When it is operating,
the HART analog module continually sends the HART command 1 to update
the value of the primary variable. This value is entered in the user data area
(see Section 4.8.6).
Table 4-5 Parameters for the analog output module SM 332; AO 2 x 0/4...20mA HART
Parameter Range of values Default Type of
Effective Effect ve
Basic settings
Enable
setting parameter range
Diagnostic interrupt yes/no no dynamic module
Diagnostics
Group diagnostics yes/no no static channel
Behavior during CPU STOP
No current or voltage at
outputs (NCVO)
Retain last value (RLV)
Switch substitute value (SV) 0/4...20 mA (-32512...32511)* 0/4 mA
(-6912/0)*
EWS
dynamic channel
Output
Type of output deactivated
current
HART
Range of output 4...20mA
0...20mA
*) Values in brackets can be set with SFC dynamic parameterization
HART dynamic channel
4...20mA dynamic channel
I/O Modules with Intrinsically-Safe Signals
C79000-G7076-C152-04