MessageTrigger
Device Commands Description
MessageTrigger Class
Revision: - Author: buteau
1 - Init
- Description: This commands re-initialise a device keeping the same network connection.
After an Init command executed on a device, it is not necessary for client to re-connect to the device.
This command first calls the device delete_device() method and then execute its init_device() method.
For C++ device server, all the memory allocated in the nit_device() method must be freed in the delete_device() method.
The language device desctructor automatically calls the delete_device() method.
 
- Argin:
DEV_VOID
: none.
 
- Argout:
DEV_VOID
: none.
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
2 - State
- Description: This command gets the device state (stored in its device_state data member) and returns it to the caller.
 
- Argin:
DEV_VOID
: none.
 
- Argout:
DEV_STATE
: State Code
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
3 - Status
- Description: This command gets the device status (stored in its device_status data member) and returns it to the caller.
 
- Argin:
DEV_VOID
: none.
 
- Argout:
CONST_DEV_STRING
: Status description
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
4 - Start (for expert only)
- Description: Start the monitoring of target attributes defined in the MessageList property
 
- Argin:
DEV_VOID
: nothing
 
- Argout:
DEV_VOID
: nothing
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
5 - Stop (for expert only)
- Description: Stop the monitoring of target attributes defined in the MessageList property
 
- Argin:
DEV_VOID
: nothing
 
- Argout:
DEV_VOID
: nothing
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
6 - Trigger
- Description: triggers the DevTalk command for each attribute of the messageList which has changed
 
- Argin:
DEV_VOID
: nothing
 
- Argout:
DEV_VOID
: nothing
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
- Polled every 2000 ms
7 - ClearMessageListAttr (for expert only)
- Description: clear the sentMessageList attribute
 
- Argin:
DEV_VOID
: nothing
 
- Argout:
DEV_VOID
: nothing
 
- Command allowed for:
- Tango::ON
- Tango::OFF
- Tango::ALARM
 
ESRF - Software Engineering Group