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4-2
LaserNET Program User's Guide
September 2003
TM0048
4. Enter a name for the IIM up to 20 characters long.
5. Select
<OK>
to save your entry and close the window. The top line of the LaserNET screen displays:
Local LaserNET Connection to (owner location)."
4-4
MISCELLANEOUS IIM PARAMETERS
There are three additional configuration options for the IIM: the type of RS-485 wiring supervision, IIM fault
delay and enabling of auxiliary alarm and fault inputs on the IIM.
Figure 4-3. Miscellaneous Parameters
4-4.1
Wiring Configuration
The RS-485 HART XL network can be configured for two styles of supervised wiring. For additional details,
refer to the HART XL Installation, Operation and Maintenance Manual (TM0042).
Style-4.
This is the factory default. One pair of wires is run (in a Class-B fashion) from Channel One on
the IIM to all of the Detectors.
Style-6
. This option is used to provide Class-A wiring, allowing communications to continue to all De-
tectors even with (one) open or ground fault on the RS-485 signalling line circuit. One pair of wires runs
from Channel One on the IIM to all of the Detectors, then returns to IIM Channel Two.
To specify the wiring configuration, do the following:
1. Select
IIM
from the menu bar on the main screen. The Intelligent Interface Module window opens.
2. Select
Setup
>
Miscellaneous
. The Miscellaneous Parameters
window opens, as shown in Figure 4-3.
3. In the Wiring Configuration box, select one of the two options:
Style-4
or
Style-6
.
Note:
In order to make the change effective, the installer or user must reset the IIM by pressing the Reset
switch on the IIM board.
4. Select
<OK>
to save the configuration.
4-4.2
Fault Delay
This option delays the fault condition on an IIM for the programmed period of time.
1. Select
Setup
>
Miscellaneous
to open the Miscellaneous Parameters window.
2. In the Fault Delay box, enter a delay period in seconds. The period can be from zero (that is, no delay)
to 90 seconds. The factory default is 30 seconds.
3. Select
<OK>
to save the configuration.
Содержание HART XL
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