MACTek BULLET™ – User Manual
DM1101010UAB
Copyright 2009-2010
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HART Retry Count
This is the amount of retries the Bullet will attempt when communicating as a HART
mater to wired-HART devices.
By Default, the Bullet is configured to use 3 retries. Through the DD, the retry count can
be set to 2, 3, 4 or 5.
HART Number of Response Preambles
This is the amount of preambles the Bullet will use when responding to HART
commands sent by a HART master (such as a HART communicator or PC with HART
modem) on the wired-HART connection.
By Default, the Bullet is configured to use 5 preambles. Through the DD, the response
preamble count can be set between 5 – 20 preambles.
Write Protect
This setting allows the configuration inside of the Bullet to be write protected. The write
protect setting is controlled through the DD.
By Default, the Bullet is configured to have write protect disabled. Through the DD, the
write protect setting can be enabled or disabled.
Sub-Device Time Synchronization
If a HART 7 or greater sub-device is detected and it supports a real-time clock, the Bullet
can synchronize the sub-device time with the WirelessHART Network time if this setting
is enabled. If the sub-device does not support a real-time clock, this setting has no
effect. This synchronization will be performed when the Bullet joins the WirelessHART
network and then once per day.
Sub-Device Scan on Power-up
When Sub-Device Scan on Power-up is enabled, the Bullet will scan the 4-20mA loop for
attached HART devices on power-up or when the Bullet is reset. These will be added to
the list of supported sub-devices for the Bullet and will be communicated with the
WirelessHART gateway.
NOTE: The sub-device scan is only performed after a power-up or reset of the Bullet. If
wired-HART devices are added to the loop after the Bullet is powered, execute the Scan
for Sub-Devices method or reset the Bullet to detect them.
Within the DD, Automatic Sub-device detection can be enabled or disabled. It is highly
recommended that this mode always be left
enabled
.
