User manual

WI-GTWY-9-xxx Wireless Gateway V1.18
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In addition to cyclic data exchange with slave devices, the WI-GTWY-9-xxx Profibus Master
also supports a number of acyclic 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 WI-GTWY-9-xxx 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 WI-GTWY-9-xxx 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 WI-GTWY-9-xxx), 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
The message interface supports the following types of communication:
• Command - Response
A message is sent by the message initiator, and the message recipient is required to
respond. The message initiator can be either the WI-GTWY-9-xxx or host device.
• Indication
A message is sent by the message initiator, and no response is required. The message
initiator can be either the WI-GTWY-9-xxx or host device.
Message Structure
A message consists of a message header and message data (see table below). The header consists
of a series of 16-bit registers that specifies the type of message and the length of the message
data. The message data may be up to 128 x 16bit registers in length and contain data that is
specific to the particular message.