Echelon i.LON SmartServer 2.0 - Manual (Page 271)

i.LON SmartServer 2.0 Programmer’s Reference 16-4
Property Description
the M-Bus network. A parity bit is an extra bit used to
check for errors in groups of data bits transferred between
devices. The default parity size is P_EVEN. This property
may be one of the following values:
ƒ P_NONE
ƒ P_ODD
ƒ P_EVEN
• . The number of stop bits used on the
M-Bus network. The default value is SB_1. This property
may be one of the following values:
ƒ SB_1
ƒ SB_2
This property is not available for TCP/IP M-Bus channels.
The number of times a network message is re-sent when no
confirmation is received. The default value is 1 for M-Bus
channels.
If a network message fails, a data point and its device are
marked offline. You can specify the
property so that all the data points on the offline device with
pending network messages (read/write requests, polls, or
heartbeats) are marked offline and network messages are not
sent to them. This ensures that network performance is not
impacted by an offline device.
You can set the minimum period of time (in seconds) that the
SmartServer waits before transmitting network messages to
offline data points. During this period, an offline device
transmits an OFFLINE status in response to data point requests.
Once elapses, the SmartServer sends a
read/write request to one offline data point. If the read/write
request succeeds, the data point and its device are marked
online, and all cached read/write requests for the offline data
points on the device are executed.
This property is optional. If you do not specify this property in
a Set function, the current value stored in it is erased. You must
specify this property even if you are not changing it in order to
preserve the current value.
The default for an M-Bus channel is
60 seconds.
16.1.3 Using the Set Function on M-Bus Channels
You can use the Set function to overwrite the configuration of an M-Bus channel, or to create a new
M-Bus channel. The input parameters you supply to the function will include one or more
elements. Each element includes a property that specifies a unique M-Bus
channel to be created or modified.
Each element may also include a series of properties that define the configuration of the new
(or modified) M-Bus channel. This set of properties is the same whether you are creating a new
M-Bus channel or modifying an existing M-Bus channel.