Siemens SITRANS PCS 7, Function Manual, Page: 683 / 850

Activation of the individual monitoring functions is carried out at the corresponding "Enable"
parameters, e.g.
GradHUpEn
for activating the high gradient limit for positive gradients
(
GradHUpLim
).
Reaching or violation of your defined limits is indicated at the corresponding "Active" output
parameters, e.g. by means of
GradHUpAct
= 1 for the limit (high) for the positive gradient.
Messages can be output for these alarms. You can activate these as follows:
● Message for alarms (high) for the positive gradient:
GradHUpMsgEn
= 1
● Message for alarms (high) for the negative gradient:
GradHDnMsgEn
= 1
● Message for alarms (low) for the absolute gradient:
GradLMsgEn
= 1
Suppressing messages using the
MsgLock
parameter
This block provides the standard "Suppressing messages using the
MsgLock
parameter"
function that is described in the APL Online Help.
Bypass function
This block provides the standard function Interlocking functions (Page 13).
Selecting a unit of measure
This block provides the standard function Selecting a unit of measure (Page 13). The units for
the 4 to 20 mA signal and the HART variables are configured on the device of the Sitrans LR
via PDM and read by an operator action in the "Parameters" faceplate view with "Read
configuration" or configured by the user himself if HART communication does not exist.
If volume is selected for the 4 to 20 mA signal or one of the HART variables (Sitrans LR 200 or
LR 250), the volume unit must be configured at the
PV_Unit0
and
PV_Unit1
(4 to 20 mA
signal) or
PV_Unit2..4
(HART variables) inputs.
Forming the signal status for blocks
This block provides the standard "Form and output signal status for technological blocks"
function that is described in the APL Online Help.
The worst signal status
ST_Worst
for the block is formed from the process values:
●
PV_In.ST
●
PV.ST
●
SV.ST
●
TV.ST
●
QV.ST
Release for maintenance
This block provides the standard "Maintenance enable" function that is described in the APL
Online Help.
SITRANS LR HART
15.1 SitrLRHA
SITRANS Library for PCS 7
Function Manual, 05/2019, A5E35351976-11
683