FB_READ_191_SNVT_log_status
This function block receives the following LON input variable (nvi):
SNVT Name: SNVT_log_status.
SNVT number: 191
Description: Log status (hundredth of a second). Represents the current status of a data logging. Update based on the cpLogNotificationThreshold value. Displays only the status. Alarms are output via the node object nvoAlarm2. Is required if the node object contains no nvoLogStat output.
Inputs
VAR_INPUT
wNVIndex : WORD;
bDisabled : BOOL := FALSE;
END_VAR
Name | Type | Description |
|---|---|---|
wNVIndex | WORD | Unique index. This is required for binding the LON nodes. A maximum of 62 SNVTs are permitted per LON terminal. Values between 0 and 61 are possible. |
bDisabled | BOOL | TRUE = deselection of the function block. |
Inputs/outputs
VAR_IN_OUT
stLON_Com : ST_LON_Communication;
END_VAR
Name | Type | Description |
|---|---|---|
stLON_Com | This structure is used to link FB_LON_KL6401() with the transmit/receive blocks. |
Outputs
VAR_OUTPUT
stValue : ST_LON_SNVT_log_status;
bNewData : BOOL;
bError : BOOL;
eError : E_LON_ERROR;
END_VAR
Name | Type | Description |
|---|---|---|
stValue | Structure of the data that was received. | |
|
bNewData |
BOOL |
Becomes TRUE for 1 cycle when the function block has received data. |
|
bError |
BOOL |
This output goes TRUE as soon as an error occurs. This error is described via the eError variable. |
|
eError |
In the event of an error, the output issues an error code and bError becomes TRUE at the same time. |
Requirements
Development Environment | TwinCAT 3 PLC library to be integrated |
|---|---|
TwinCAT from v3.1.4020.14 | Tc2_LON from 3.3.4.0 |