Macurco MRS-485 Modbus RS-485 Adapter
REV – 1.0
[34-2900-0019-7]
21
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P a g e
6
Troubleshooting
6.1
On-Board Diagnostics
6.1.1
Unknown Sensor Code
GREEN/OFF Alternating every 500 milliseconds - The BRS-485 does not know the detector type, no Modbus
communications are in progress and no errors are detected.
To correct this condition:
1.
Disconnect the power line from the BRS-485.
2.
Disconnect the communication line from the BRS-485.
3.
Re-connect the communication line to the BRS-485.
4.
Re-connect the power line to the BRS-485.
6.1.2
Error Codes
Solid RED
- The BRS-485 detected an error and no Modbus communications are in progress.
RED
with random bursts of AMBER
- The BRS-485 detected an error and AMBER is displayed when data are
received or transmitted over the RS-485 line
There are a number of conditions which are signalized in this way:
•
Current EEPROM Settings not initialized
•
Current EEPROM Settings have bad checksum
•
Factory EEPROM Settings not initialized
•
Factory EEPROM Settings have bad checksum
•
Unknown Sensor exponent value
•
Watchdog reset
•
Loaded Factory EEPROM Settings in EEPROM Current Settings
•
Latched sensor type different than registered sensor type
Summary of Contents for BRS-485
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