Siemens SIPART Series - 9.4.3.11 Description of parameter O

Parameterizing/addressing
9.4 Description of parameters
SIPART PS2 with and without HART
196 Operating Instructions, 10/2013, A5E00074631-11
9.4.3.11
Description of parameter O
O. DCHG - monitoring the change of direction
Use this parameter to continuously monitor the number of changes of direction of the
actuator caused in the deadband.
Configure the following settings to activate the test:
1. Set the "O.
DCHG" parameter to "On". Sub-parameters to set the test parameters are
displayed. The test is activated.
2. Set the suitable parameter values in sub-parameters. The setting options available in
sub-parameters are described below.
The current value is displayed in the "2 CHDIR" diagnostics parameter. The positioner
triggers a fault message if the current value exceeds a limit threshold.
The factory setting is "OFF".
O1.LIMIT - limit for the change of direction
Use this sub-parameter to set the base limit for the number of changes of direction of the
actuator. Set the base limit in a range from "1" to "1.00E8".
The factory setting is "1.00E6".
O2.FACT1 - factor 1
Use this sub-parameter to set the factor for the formation of limit threshold 1. Set the factor in
a range from "0.1" to "40.0". The limit threshold is the product of "O1.LIMIT" and
"O2.FACT1".
The threshold 1 error message is displayed when the limit threshold 1 is exceeded. The
procedure to activate and display this error message is described in the "XDIAG" parameter.
The factory setting is "1.0".
O3.FACT2 - factor 2
Use this sub-parameter to set the factor for the formation of limit threshold 2. Set the factor in
a range from "0.1" to "40.0". The limit threshold is the product of "O1.LIMIT" and
"O3.FACT2".
The threshold 2 error message is displayed when the limit threshold 2 is exceeded. The
procedure to activate and display this error message is described in the "XDIAG" parameter.
The factory setting is "2.0".
O4.FACT3 - factor 3
Use this sub-parameter to set the factor for the formation of limit threshold 3. Set the factor in
a range from "0.1" to "40.0". The limit threshold is the product of "O1.LIMIT" and
"O4.FACT3".