3 ld protocol specific, Ld protocol specific – INFICON HLD6000 Refrigerant Leak Detector Interface Description User Manual
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Trouble Shooting
5.3
LD Protocol specific
Error
Possible Reason
Solution
IO1000 does not reply
Wrong Address
Always use Address 1 in LD protocol.
Other protocol errors
Try to use NOP command (05hex 04hex 01hex
00hex 00hex 77hex) first, to check if connection
works in general. The answer should be 02hex
05hex XXhex XXhex 00hex 00hex XXhex
IO1000 replys with CRC
error (error code 1)
Wrong CRC calculation
Check you CRC code calculation. See example C
source file "CRC_calculation.c" provided by
INFICON. Check your code with unit test function in
this source code file.
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