User guide
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9 RS485 Communication
9.3.2 Answer commands (TX)
In the response (answer) telegram the recommended start byte from the above table is repeated as the start by. The value is increased by
0x80.
Command Value Comment, conditions
COM_CTX_FAHRBEFEHL_DREHZAHL 0x80 FE_SOLLDREHZAHL RS485
COM_CTX_FAHRBEFEHL_POSITION 0x81 FE_SOLLDREHZAHL RS485
COM_CTX_PARAMETER_STORE 0x82
COM_CTX_PARAMETER_WR 0x83
COM_CTX_PARAMETER_RD 0x84
COM_CTX_STATUS_RD 0x85
COM_CTX_PARAMETER_RELOAD_DFLT 0x86
COM_CTX_SOFTWARE_ID_RD 0x87 Software-ID
COM_CTX_BOOTLOADER_ID_RD 0x88 Bootloader-ID
COM_CTX_CUSTOMER_ACCESS 0x89 Access to parameters
COM_CTX_BACK_TO_BOLO 0x8B Jump back into bootloader takes place
COM_CTX_CUSTOMER PASS SET 0x8C Customer password is reset
If an undefined or incorrect telegram is detected, the telegram “COM_CTX_STATUS_RD” is sent in response.
9.4 Status byte
Unless stated otherwise, the error flags set in the status byte of the answer have the following meaning:
Bit Meaning
0 Undefined telegram
1 Telegram length too short or checksum incorrect
2 Wrong parameter number
3 Telegram can now not be processed
4 Telegram-dependent
5 Telegram-dependent
6 Telegram-dependent
7 Telegram-dependent
Bit 0 to 3 are identical for all telegrams.
Bit 4 to 7 are telegram-dependent.