Output Description¶
DONE (done)
Data type: BOOL
Output DONE indicates the state of the job processing.
After completing or aborting the processing (due to an error), DONE is set to TRUE for one cycle. For that reason, the output always has to be considered together with output ERR. If ERR is TRUE, an error occurred. In this case, the error number can be read at output ERNO.
ERR (error)
Data type: BOOL
Output ERR indicates whether an error occurred during the Function Block processing.
This output always has to be considered together with output DONE. If DONE is TRUE and ERR is TRUE, an error occurred. In this case, the error number can be read at output ERNO.
ERNO
| Data_Type | Default_Value | Range | Unit |
|---|---|---|---|
| WORD | - | 0 … 65535 | - |
At output ERNO the identifier of an occurred error is provided. It is only valid when DONE and ERR is TRUE (see, error messages): Error Messages of the Function Block Libraries
STATE_BITS
Data type: DPM_STATE_BITS_TYPE
The Output STATE_BITS provides error or diagnosis flags of the PROFIBUS DP Communication Module.
DPM_STATE
Data type: BYTE
At output DPM_STATE, the DP master state is output according to the standard. The following states are defined:
OFFLINE 00HEX / 00DEC
STOP 40HEX / 64DEC
CLEAR 80HEX / 128DEC
OPERATE C0HEX / 192DEC
DPM_STATE = OFFLINE
The PROFIBUS DP Communication Module is in initialization state, if DPM_STATE has the value OFFLINE. After the initialization phase is completed, the Communication Module changes to STOP state.
DPM_STATE = STOP
The Communication Module is completely initialized, if DPM_STATE has the value STOP. In this state the Communication Module is ready to receive configuration data. No data are exchanged with the DP slaves. The Communication Module has this state, if no user program is running.
DPM_STATE = CLEAR
When starting the user program, the Communication Module changes from STOP into CLEAR state and begins, via the bus, to parameterize (set into operation) the DP slaves assigned during configuration. When the setup has been completed successfully, the Communication Module moves to OPERATE state. If an error occurs during parameterization, the Communication Module changes back to STOP state.
DPM_STATE = OPERATE
Normally, the Communication Module is in OPERATE state, while a user program is running. In this state, the DP master exchanges I/O data with the DP slaves. If an error occurs during this process, and if Auto Clear Mode was selected during configuration, the Communication Module changes back to CLEAR state and tries to parameterize the DP slaves again.
If Auto Clear Mode was not selected, the Communication Module remains (in case of an error) in OPERATE state. When stopping the user program, the Communication Module also changes back to STOP state.
DPM_STATE is only valid, if EN = TRUE and ERR = FALSE.
COM_ERR
Data type: DPM_COM_ERR_TYPE
The Output COM_ERR provides detailed information to the corresponding output STATE_BITS.
The element address contains the node address of the faulty device and the element event the error code. If several errors occur simultaneously, the output contains the error of the device with the lowest address.
The structure of the type DPM_COM_ERR_TYPE is defined in the PROFIBUS library and described in the following chapter together with the possible errors.
BUS_ERR
Data type: WORD
BUS_ERR outputs the number of serious bus errors since system startup, such as transmission line short circuits.
BUS_ERR is only valid, if EN = TRUE and ERR = FALSE.
TIME_OUT
Data type: WORD
TIME_OUT outputs the number of timeout errors since system startup. A timeout error occurs, if a DP slave does not respond to a DP master’s request within the configured time.
TIME_OUT is only valid, if EN = TRUE and ERR = FALSE.
Note
The values BUS_ERR and TIME_OUT are operated different for Communication Modules CM572-DP and CM592-DP.
On CM572-DP BUS_ERR and TIME_OUT are operated independently and will count error events one by one basically.
On CM592-DP BUS_ERR and TIME_OUT are incremented always at once. Due to internal handling of error events the counters are updated with steps greater one always.