User manual

Chapter 4 Configuration
MAN_905G_1.16 Page 92
4.10.4 Message Interface
In addition to cyclic data exchange with slave devices, the 905G Profibus Master also
supports a number of acyclcic services that may be triggered via a special Message Interface.
The message interface is by default disabled, but will become enabled by also enabling a
“Status Location” via the fieldbus configuration tab in configuration software.
The message interface is used to instruct the 905G to perform a specific task, to request data,
to indicate certain events (alarms), or to respond to requests. The message interface can be
controlled via a host or other smart device by constructing the appropriate message in the
Message Interface Area of the 905G I/O Registers (radio interface). Since the message
interface is part of the radio interface, it may be controlled either remotely via appropriate
block mappings (i.e. remote 905G), or locally via a device on the profibus network (i.e.
configuration tool, PLC, or other smart device).
The supported messages are listed in the table below.
Message Description
SET_SLAVE_MODE Send control command to slave(s) (Sync/Freeze)
GET_SLAVE_DIAG Get diagnostic information from a slave
GET_SLAVE_CONFIG Get slave configuration
SET_SLAVE_ADDRESS Set node address of a slave (If supported by slave)
MSAC1_READ acyclic read (class 1)
MSAC1_WRITE acyclic write (class 1)
GET_LIVE_LIST Get information from all nodes on the network
MSAC1_PROFIDRIVE_V3_PARAM_
WRITE
PROFIdrive v.3 acyclic parameter access
MSAL1_ALARM_IND Alarm indication from DPV1 slave
MSAL1_ALARM_CON Confirmation to FB_MSAL1_ALARM_IND