Technical data

R911305038 / 01 | Rexroth VCP-Operating Concept Electric Drives and Controls | Bosch Rexroth AG 6-139
PROFIBUS-DP raw
Function Block BT_READ
The function block BT_READ interprets the subsequent bytes in the
telegram as follows:
– Byte 2, bit 0 is interpreted as a byte code for a byte access to a word
address.
– Byte 3 contains the data block number.
– Byte 4 contains the data word number within the DB.
The program module doubles the data word number for the even-num-
bered byte number in the DB.
Function Block BT_WRITE
The function block BT_WRITE interprets the subsequent bytes in the
telegram as follows:
– Byte 2, bit 0 is interpreted as a byte code for a byte access to a word
address.
– Byte 3 contains the data block number within the DB.
– Byte 4 contains the data word number within the DB (0 to 255).
– Byte 5 and
– Byte 6 contain the bit mask for the logical operation.
– Byte 7 contains the logical instruction (AND / OR).
Parameterization of the BM-DP12 Module
Set the parameters for the module using the Bosch DP software.
The device data base (GSD) file RX01081A.GSD which is supplied is
directly read in by the DP software. This means that the data required
to set the parameters of the operating devices are automatically avai-
lable.
Select the operating device with the required data width.
The function block copies bytes 1 and 2, unchanged, from the request
telegram to the response telegram, and writes 0x00 to byte 3.
Value Meaning
0 Odd Address - Low Byte
1 Even Address - High Byte
Fig. 6-208: Byte code in byte 2
Value Meaning
0 Odd Address - Low Byte
1 Even Address - High Byte
Fig. 6-209: Byte code in byte 2