Bender FTC470XDP, Руководство пользователя

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The FTC470XDP protocol converter
19 FTC470XDP_D00111_00_M_XXEN/02.2015
4.4.5 Format of output and input data
The communication process is regarded from the PROFIBUS DP’s point of view. The PROFIBUS DP
Master sends the output data, a byte sequence, to the FTC470XDP (the PROFIBUS Slave). As an an-
swer, the input data is returned as a byte sequence to the PROFIBUS DP Master. As already explained
before, the assignment of input bytes and output bytes, i.e. of requests and answers, is carried out
via an ID number. The PROFIBUS DP programmer is responsible for the correct assignment of the
next ID number immediately after receiving an answer to the last request.
Format of output data:

Byte 1:
Consecutive ID No. of transmission. Must be set by the programmer of the PROFIBUS DP Master.
The ID number for the next request must be incremented as soon as an answer to the previous
request is received.

Byte 2:
No function, always zero (0) must be entered here

Byte 3:
BMS address of the addressed device. Note: TM operator panels and PRC1470 must be
addressed via their internal interface. Data of the external interface of these devices cannot be
processed by the FTC470XDP.

Byte 4:
BMS channel number of the addressed device. If no channel number is required, enter "0".

Byte 5:
BMS command code, refer to the tables on page 28. If no command code is required, enter "0".

Byte 6:
BMS data type, refer to the tables on page 28. If no data type is required, enter "0".

Byte 7:
BMS high byte data value, refer to the tables on page 28. If no data value is required, enter "0".

Byte 8:
BMS low byte data value, refer to the tables on page 28. If no data value is required, enter "0".
Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8
Consecutive
ID number of
transmission
always
"0"
BMS address of
the addressed
device
Channel number
of the addressed
device
Com-
mand
Type of data
value
High byte
data value
Low byte
data value