OPERATION
5
21
OPTIBRIDGE
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5.2.2 Channel configuration
The window is used to configure the channel. The window can be accessed via menu "additional
functions". The following features can be configured:
"Primary Master"
1
- The parameter Primary Master specifies whether the HART
®
master
operates as the Primary master or as a Secondary master on the bus.
"Preambles"
2
- The default setting for the number of preambles for communication with
HART
®
bus devices. This value is used to establish the initial connection to a HART
®
device. The
number of preambles to use for communication with the device is read from the device itself and
used for communication afterwards.
"Max. Retries"
3
- This parameter specifies how often the HART
®
master retries to transmit
information in case of an error.
"Max. Scan Address"
4
- This parameter represents the maximum polling address. The value
must not exceed 63 for HART
®
7 (in HART
®
5 or lower revisions the value must not exceed 15).
The scan procedure of 64 polling addresses (0 - 63) requires several minutes.
Figure 5-2: Channel configuration
