Dräger Polytron 8100, Инструкция по эксплуатации, Страница: 24 / 254

24 Dräger Polytron 8100
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5.9 Settings communication
5.9.1 HART interface
These functions change the settings of the HART interface.
Polling address
The polling address configures the instrument for analog
operation (4 to 20 mA) or multidrop operation. Setting the
polling address to 0 activates analog operation (4 to 20 mA).
Setting the polling address to a value between 1 and 15
activates multidrop operation. In multidrop operation the
analog interface is deactivated and set to a constant current of
approximately 1 mA.
To allow the central controller to request the Unique Identifier
(unique HART address) with HART command #0, all the
devices on a line must be configured with different polling
addresses. It is advised to choose a sequence starting with 1
and continuous increments.
This function corresponds to HART command #6 (Write Polling
Address).
1. Select Settings > Communication > HART interface >
Polling address and confirm.
2. Select the line for editing the address and confirm.
3. Set the polling address and confirm.
4. Select
Confirm and confirm with [OK].
Unique Identifier
This function reads the Unique Identifier (unique HART
address). It has to be known for almost all HART addressing
commands. However, this information is only required for
systems which are not able to read back the Unique Identifier
using the HART command #0 in Short-Frame Format or HART
command #11. The display corresponds to the address for
HART command #0 (Read Unique Identifier) or #11 (Read
Unique Identifier associated with Tag).
1. Select Settings > Communication > HART interface >
Unique Identifier and confirm.
The Unique Identifier is displayed.
Tag
The tag can be used to identify an instrument. It can contain up
to 8 alphanumeric characters. The tag can also be used as an
address for reading the unique identifier using HART
command #11 (Read Unique Identifier Associated with Tag),
even if the polling address is unknown. This requires that a
unique tag has been configured for each instrument.
1. Select Settings > Communication > HART interface >
Tag and confirm.
2. Select the line for editing the tag and confirm.
3. Set the tag and confirm.
4. Select
Confirm and confirm with [OK].
Dräger REGARD
This function switches between different HART protocols.
1. Select Settings > Communication > HART interface >
Dräger REGARD and confirm.
2. Select REGARD SW 2.0 or REGARD SW 1.4 and confirm.
5.9.2 Analog interface
These functions set currents for special signals on the analog
interface and send test currents for validation at the central
controller.
Fault current
This function defines the current for the fault signal.
1. Select Settings > Communication > Analog interface >
Fault current and confirm.
2. Select the line for editing the current and confirm.
3. Set the current and confirm.
4. The setting for the fault current is displayed.
5. Select
Confirm and confirm with [OK].
Warning signal
If turned On, the warning signal will be transmitted on the
analog interface if a warning message is available. The default
setting for the warning signal is “warning current” for one
second and the “measurement current” for 9 seconds. These
time intervals and the warning current can be changed.
To switch the warning signal on or off:
1. Select Settings > Communication > Analog interface >
Warning and confirm.
2. Select Enable or Disable and confirm.
NOTICE
REGARD SW 2.0 is the default setting. REGARD SW
1.4 must be selected for REGARD controllers with
SW 1.4.
WARNING
This function switches the warning signal On or Off.
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