MICRO-EPSILON ILD1700-2 - Command Reply; Communication Without Error

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Serial Interface RS422
optoNCDT 1700
Format:
31 24 23 16 15 8 7 0 hex Contents
„+“ „+“ „+“ 0x0d („CR“) 0x2B2B2B0D Start word
„I“ „L“ „D“ „1“ 0x494C4431 Identifier ID „ILD1“
0x20 0x75 0x00 0x03 0x20750003
Command (0x2075)
2 top bits = 0
Package length
= 3
0x00 0x00 0x00 0x0A 0x0000000A Data word 1 (X = 0xA)
8.4 Command Reply
8.4.1 Communication without Error
No start word is transmitted, if the sensor replies to a command. The 1st word then is the sensor identifier.
The second word is the command with set MSB (Bit 31 = 1, corresponding an OR operation of the command
with 0x8000) and the new package length, if there was no error during communication. With longer answers
(e.g. GET_INFO) the package length is larger according to the quantity of data words to be transmitted. A
firm 32 bit word 0x20200D0A forms the conclusion of the answer. The conclusion word is not a data word.
Example: Sensor reply (without error) to the SET_AVX command.
31 24 23 16 15 8 7 0 hex Contents
„I“ „L“ „D“ „1“ 0x494C4431 Identifier ID „ILD1“
0xA0 0x75 0x00 0x02 0xA0750002
0x2075 OR 0x8000
(MSB = 1)
Package length
(2)
0x20 0x20 0x0D 0x0A 0x20200D0A Conclusion word
Wait until the sensor reply, before you send a new command to the sensor.