Rosemount 2240S, Reference Manual

Page: 69 / 100

Reference Manual
300550EN, Rev AA
December 2010
6-11
Rosemount 2240S
Section 6. Service and Troubleshooting
6.3 TROUBLESHOOTING
Table 6-3. Troubleshooting
chart for the Rosemount 2240S
Multi-input Temperature
Transmitter
Symptom Possible cause Action
No communication with the
Rosemount 2240S transmitter Wiring
• Check that the device appears in the Device Live List ,
see the Rosemount 2410 Reference Manual
(Document No. 300530EN) for more information
• Check that wires are properly connected to the
terminals.
• Check for dirty or defective terminals.
• Check wire insulation for possible short circuits to
ground.
• Check that there are no multiple shield grounding
points.
• Check that the cable shield is grounded at the power
supply end (2410 Tank Hub) only.
• Check that the cable shield is continuous throughout
the Tankbus network.
• Check that the shield inside the instrument housing
does not come into contact with the housing.
• Check that there is no water in conduits.
• Use shielded twisted pair wiring.
• Connect wiring with drip loops.
• Check the 2410 Tank Hub wiring.
Incorrect Tankbus termination
• Check that there are two terminators on the Tankbus.
Normally the built-in termination in the 2410 Tank Hub is
enabled.
• Check that terminations are placed at both ends of the
Tankbus.
Too many devices on the Tankbus
• Check that the total current consumption of the devices
on the Tankbus is less than 250 mA. See the
Rosemount 2410 Reference Manual (Document no.
305030en) for more information.
• Remove one or more devices from the Tankbus. The
2410 Tank Hub supports a single tank. The multiple
tank version of the 2410 supports up to 10 tanks.
Cables are too long
• Check that the input voltage on the device terminals is
9 V or more.
Hardware failure
• Check the 2240S Error LED:s (see “Device Error LED
Signals” on page 6-7).
• Check the 2160 Field Communication unit (FCU).
• Check the 2180 Field Bus Modem.
• Check the communication port on the control room PC.
• Contact Emerson Process Management/Rosemount
TankGauging service department.
Software failure
• Restart the 2240S with the Reset button or by using the
Restart command in TanMaster WinSetup.
• Restart all devices by disconnecting and connecting the
power supply to the 2410 Tank Hub.
• Contact Emerson Process Management/Rosemount
TankGauging service department.