Flowserve MX-100 Field Unit - Manual (Page 44)

MX/DDC-100 Field Unit Installation and Maintenance FCD LMENIM2329-01 – 03/11
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3.4 Configuration Confirmation
Field unit operation cannot be verified until the complete DDC-100 system is operational. However, routine checks
can be performed to verify many functions.
3.4.1 Checking Connections
Verify that all connections, including data wires, shield ground, digital inputs (optional), digital outputs (optional),
and analog inputs (optional) are in accordance with MX wiring diagrams and field unit diagrams in Section 3.1.2,
Network Cable Preparation.
3.4.2 View Settings
Refer to LMENIM2306, MX Installation and Operation Manual to access the “VIEW SETTINGS” menu. Verify the
settings as follows:
1. Confirm the DDC status is ON.
2. Confirm the address for each field unit is correct and unique.
3. Confirm the baud rate and the protocol are correct.
4. If the MX relay (S / R) contacts are to be used to control external equipment, verify that each of the digital outputs
is set for “DDC CONTROLLED” in the “VIEW STATUS AND ALARM CONTACTS” menu. (Refer to Table 3.7.)
3.4.3 Checking the Normal Display
Place the selector switch in “LOCAL” or “REMOTE” position. The valve position will be indicated at the top of the LCD.
“STATUS OK” or “DDC COMM LOSS” should be indicated at the bottom of the LCD display.
If “ • STATUS OK” is displayed, the field unit is communicating with the host/Master Station II.
If “ • DDC COMM LOSS” is displayed, no communication is occurring. This could be due to a number of factors,
including problems with the host system (Master Station II) and/or network. Check all local connections and config-
urations. Confirm that the host is connected, configured for baud rate, protocol to match DDC, and operational. See
also Section 5, Troubleshooting.
Figure 3.10 – Error Messages
Remote
Local
or
Field unit is communicating
with host/master station
No communications
Remote
Local
or