Kipp&Zonen COMBILOG Data Logger - Manual (Page 133)

Diagnostic
Description:
By this command a diagnostic telegram will be sent to the data
logger. If the telegram has been received in correct form the
module will send this telegram back unchanged (echo tele-
gram).
Request Telegram
ADR FNR SUBFCT DATA CRC
8 00 00 A5 37 MSB LSB
Response Telegram
ADR FNR SUBFC DATA CRC
8 00 00 A5 37 MSB LSB
ADR ............ module address (hex 00..7F)
FNR ............ function number (hex 08)
SUBFCT ..... sub function number (hex 0000)
DATA .......... data word (hex A537)
CRC ............ check sum
CRC polynomial: u
15 + u 13 + 1
CRC start value: hex FFFF
Hardware Manual COMBILOG 1022
133