GetValue / SetValue / RNtfValue
GetValue
The GetValue method is used to query the property of the OCA object. If the query was successful, the result is output in the property stSetting.
 | Cyclic method call Since several PLC cycles may pass between sending and the response from the device, this method should be executed cyclically. |
Syntax
VAR_INPUT
pLink : POINTER TO ST_Link;
bExecute : BOOL;
END_VAR
Inputs
Name | Type | Description |
|---|---|---|
pLink | POINTER TO ST_Link | Pointer for establishing a connection between OCA objects and the OCA device |
bExecute | BOOL | The method is executed with a positive edge at the bExecute input. |
SetValue
The SetValue method can be used to set the property of an OCA object. If the method was executed successfully, the result is output in the property stSetting.
| Cyclic method call Since several PLC cycles may pass between sending and the response from the device, this method should be executed cyclically. |
Syntax
VAR_INPUT
pLink : POINTER TO ST_Link;
bExecute : BOOL;
sValue : STRING;
eCmdMode : E_OcaMessageTypeCmd;
END_VAR
Inputs
Name | Type | Description |
|---|---|---|
pLink | POINTER TO ST_Link | Pointer for establishing a connection between OCA objects and the OCA device. |
bExecute | BOOL | The method is executed with a positive edge at the bExecute input. |
nSetting | UDINT | Value to be assigned to the property of the OCA object. |
eCmdMode | OcaMessageTypeCmd | Depending on whether confirmation is required or not, this input variable is set to E_OcaMessageTypeCmd.OcaCmdRrq or E_OcaMessageTypeCmd.OcaCmd. |
RNtfValue
If the OCA object was prompted to notify changes (using the Subscription method), incoming notifications are read using the RNtfValue method.
| Cyclic method call Since several PLC cycles may pass between sending and the response from the device, this method should be executed cyclically. |
Syntax
VAR_INPUT
pLink : POINTER TO ST_Link;
bEnable : BOOL;
nSubscribtionNo : UDINT;
END_VAR
Inputs
Name | Type | Description |
|---|---|---|
pLink | POINTER TO ST_Link | Pointer for establishing a connection between OCA objects and the OCA device. |
bExecute | BOOL | The method is executed with a positive edge at the bExecute input. |
nSubscribtionNo | UDINT | Unique number for localizing the respective subscription. |