R&M Materials Handling HOIST MONITORS - Manual (Page 74)

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14.1.14 Fault CAN bus F_CAN
CAN bus communication fault
• Check the CAN bus wiring
• Check that the value of parameter 4-11-1 “Hoist cnt” in each unit
corresponds to the number of units connected with the CAN-bus
• Check that each connected unit has an unique address, parameter 6-1
“Hoist name”
• Check with parameter 2-1 “SW version” that each connected unit has
the same software version.
When parameters 4-11-2 and 4-11-3 are set to YES, running is not allowed after “Fault, CAN bus”.
The situation can be reset by switching the power off, and on again. This must be done for each
unit, preferably simultaneously by using the main disconnect of the crane power supply. If the
power off reset is done one by one, the fault may appear to be cleared in the first unit, however
running is possible only after resetting all other units too
14.1.15 Fault Bridge OL F_BOL
Overload in calculated bridge load
•
Check with parameter 4-11-4 “B nom load” that the load settings are the same in all connected units
14.1.16 Fault Bridge RS F_Brs
Fault in multi hoisting, requests for running not simultaneous
•
Check parameter 4-11-2 “Run sup.” in each unit connected to the CAN bus. If the parameter is set to
YES, the request must come simultaneously to each unit and remain active.
14.1.17 Fault Slack Rope – (2)
Slack rope function is activated
•
Check parameter 4-9-1 SR select
• Check parameter 4-1-1 MFI1 oper.
• See the chapter “Slack rope protection” of this manual
14.2 No Signal – (2)
Communication fault
If the display shows the text “No Signal” it means that the current loop from the unit to the display
provides the supply for the display but the serial data is distorted in such a way that the display is not
able to read the data.
Two reasons:
•
Communication fault between unit and display
- Running possible,
- Remote display or fault is typical in first hardware revision on the monitoring unit; all units are produced in
year 2001.
- The unit’s processor doesn’t start
• Running prevented
- Voltage between the terminal 25 to the terminal 30 is ~0 VDC (should be ~10 … 12 VDC)
- Unit has to be changed