Troubleshooting
Instruction manual 977 Tank Side Indicator Page 13
5 Troubleshooting
With TSI firmware version <A3.0:
If the Tank Side Indicator detects a failure in the communication with the level gauge, one of the following error
messages appears on the display:
Display Meaning of error code
ERROR TYPE 01 STX not received
ERROR TYPE 02 ETX not received
ERROR TYPE 03 Parity error in received data for 01 item
ERROR TYPE 04 Parity error in received data for 02 item
ERROR TYPE 05 Preambles bytes (FF
H
) not received
ERROR TYPE 07 Received data does not contain correct item code (i.e. 01 or 02)
ERROR TYPE 08 BCC error in received data for 01 item
ERROR TYPE 09 BCC error in received data for 02 item
ERROR TYPE 10 Item 1A data not being received from gauge
ERROR TYPE 11 Item 2A data not being received from gauge
If one of these error messages appear, then the following actions can be taken to solve the problem:
• Check cabling between Tank Side Indicator and level gauge
• Reset level gauge (by means of RS command)
• Either replace TSI or XPU-2/i.s. board (with servo gauges) or ICU_IS2 board (with 970/971/973
SmartRadar)
With TSI firmware version A3.0 and higher:
The following internal 977 Tank Side Indicator errors are detected and displayed:
Display Meaning of error and how to solve
INTERNAL RAM DEFECT *) Internal RAM defect; replace PCB assembly
CODE CORRUPT! *) EPROM code corrupted; replace EPROM
STACK CORRUPT! Switch off and on the supply of the 977 TSI (or from related level gauge); if
error still occurs, replace PCB assembly
LCD DD RAM DEFECT *) Replace LCD module
INIT LCD FAILED *) Replace LCD module
*) Providing the kind of error allows writing the message to the display.
If the Tank Side Indicator detects a failure in the communication with the level gauge, one of the following error
messages appears on the display:
Display Meaning of error
COMM TIMEOUT ERR *) Communication timeout expired (5 or 15 sec.)
UNSUPPORTED FORMAT Selected display format does not exist in the level gauge
INVALID RESPONSE LENGTH *) The message of the level gauge does not correspond to the expected
length
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