Bender COMTRAXX COM465IP - Querying Registers (Type 2)

PROFIBUS DP (COM465DP only)
28
COM465IP-COM465DP_D00216_02_M_XXEN/03.2017
Response from the gateway in the event of an error:
5.1.5.2 Type 2: Querying registers in devices on the bus
A register has a size of one word.
Byte 6: Structure of the byte: Range and unit.
For details see "R&U = Range and unit" on page 46.
Byte 7: Description high: The high byte of the measured value description.
For details see "Channel descriptions for the process image" on page 52.
Byte 8: Description low: The low byte of the measured value description.
For details see "Channel descriptions for the process image" on page 52.
Byte 9: Always 0xFF
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9
ID 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF
Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8 Byte 9 Byte 10
ID Msg
type
System Device Number
of regis-
ters
Address
high
Address
low
0x00 0x00 0x00 0x00
Byte 0: Sequential ID no.: Must be set by the person programming the PROFIBUS DP master. The
ID no. must be incremented for the next request as soon as a response has been received
to the previous request.
Byte 1: Message type: For this request always 0x02
Byte 2: Subsystem address: Depending on how the device is operated, either the BCOM or the
external BMS bus address (default for usage on the internal BMS bus: 2)
Byte 3: Device address: The internal BMS address
Byte 4: Number of registers: Number of registers to be read (min: 1, max: 4)
Byte 5: Register start address high byte: Start register starting from which the data are read
Byte 6: Register start address low byte: Start register starting from which the data are read
Byte 7-10: Always 0x00
Range & unit
Range validity
7
6
State 5
Unit
4
3
2
1
0