Flowserve MX HART Field Unit - Manual (Page 16)

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14
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7. CHANGE PROP/DEADBAND allows for the setting of proportional band and deadband. Proportional band is the
range of errors between the position and demand signal that will produce reduced speed (pulsing). The default
value is 5%. To change from default, select NO until the required value is displayed. The value is adjustable between
1% and 100%, in 1% increments. The default deadband value is 2%. For error signals less than this, no motion
occurs. The deadband should be wide enough to prevent “hunting” of the actuator but as low as possible to give
adequate response to changes in the error signal. To change from the default, select NO to adjust the value between
1% and 50%, in 1% increments to suit the application.
8. ESD ACTION allows a network ESD function to be enabled after the ESD configuration has been established for the
unit. This network ESD can be selected to do one of the following: ignore the command (NONE), CLOSE, OPEN,
STOP or POSITION the actuator. To change from the default setting, select NO until the required option is displayed.
Select YES if the setting is correct to go to the next display.
NOTE: If POSITION is chosen as the action, a MOVE TO display will be shown where the user can select the desired
position between 0 and 100% open, in one percent increments, by selecting NO until the desired position is selected.
Select YES once the setting is correct to go to the next display.
.
2.6 Installation Verification
2.6.1 Network Cabling Installation Verification
After installation is complete and prior to operation, inspect the network cable and its connection to each field device.
NOTE: Units should be disconnected from power. The network should be disconnected from the host device.
Check for the following:
1. There should not be:
• Nicks in the insulation - this can cause a short to the grounded shield.
• Cut strands in a stranded conductor - this can cause a poor connection and eventually an open circuit.
2. The shield/drain wire should only be grounded at one point in the segment to avoid ground loop problems.
3. The ground/earth connection should be at true ground potential and effective at all times. See step No. 5 in Section
2.4.1, Site Preparation.
2.6.2 MX/QX HART Device Installation Verification
Verify the field device is installed as follows:
1. Enter the Setup mode as detailed in Installation and Operation Manual Bulletins LMENIM2306 for the MX or
LMENIM3306 for the QX.
2. In the Setup mode, use the black control knob to select YES to the main menu selection. VIEW DIAGNOSTICS?
3. Select YES to the display VIEW HARDWARE STATUS?
4. Select YES to scroll through the menu selections. The LCD will read HART BOARD 1 (OK) - NEXT? if installed.
NOTE: If the HART BOARD 1 (OK)? does not appear, contact Limitorque for assistance.
5. To return to the normal display, use the black knob to select either LOCAL or REMOTE.