Siemens SITRANS PCS 7 Function Manual page 367

Description
Slave pointer
(resettable/not resettable)
Minimum and maximum
limit values
(x=1/2/3)
When writing the configuration data, only the limits of the limit sensors are transferred to the
module in accordance with their configuration (Lx_MonAct, Lx_MonTrig), but not the
configuration itself.
Note
If the module is used without HART communication, the inputs must be parameterized
accordingly manually since reading out of the configuration from the module is not possible.
Note
If alarm or warning limits are deactivated in the module by means of PDM, these are set to the
corresponding active warning or alarm limits or to the maximum or minimum value of the limit
sensor (L1/2/3_Scale.High/Low) for consistency reasons when loading modified active
alarm or warning limits or the hysteresis value.
Note
When a P420 is connected, the monitored variable (InL1/L2/L3_DevVar), the alarm
configuration (L1/2/3_AlmAct, L1/2/3_MonAct, L1/2/3_MonTrig) and the limits of the
limiter (L1/2/3_Scale.High/Low) must be entered manually because reading out from the
device is not possible.
Limit monitoring
Up to three process values (limit sensors 1, 2 and 3) can be monitored for limits which are
available on the module via the 4 to 20 mA signal or a HART auxiliary variable. Configuration
of the limits is carried out either by means of PDM and imported by reading the configuration
data from the block (not for P420!), or can be carried out on the block independent of the module
(see Feature bit 7).
The SITRANS P500 module can only monitor one process value, the SITRANS P300/DSIII
module up to three limits. If the message configuration is not applied by the module, the
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
Block parameters (I/O)
MaxPRst/MinPRst
MaxSPRst/MinSPRst
MaxSTRst/MinSTRst
MaxETRst/MinETRst
Lx_Scale.High/Low
SITRANS P
10.1 SitransP
Read com‐ Read com‐
mand mand
P500 P420
172 145
Modbus
addresses:
(7010, 695
0,
7012, 6952
,
---, ---,
7008, 6948
)
15 -
Read com‐
mand
P300/DSIII
162
15/ 170/
172
367