REXROTH Fv Series, Instruction Manual

Page: 185 / 222

Lower byte of write data 00H
CRC lower byte 69H
CRC higher byte CBH
End Transmission time for 3.5 bytes
Fig.12-8: Function 0x06_slave response
● Function 0x08: Loop test.
To test the communication loop of 2 continuous words 1234H and 5678H
with converter slave address 01H, the frame structure is described in fig. 12-9
"Function 0x08_master request" on page 183 and fig. 12-10 "Function
0x08_slave response" on page 183 .
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 08H
Higher byte of test word 1 12H
Lower byte of test Word 1 34H
Higher byte of test data Word 2 56H
Lower byte of test Word 2 78H
CRC lower byte 9BH
CRC higher byte 3FH
End Transmission time for 3.5 bytes
Fig.12-9: Function 0x08_master request
Start Transmission time for 3.5 bytes
Slave address 01H
ModBus function code 08H
Higher byte of test word 1 12H
Lower byte of test word 1 34H
Higher byte of test data word 2 56H
Lower byte of test word 2 78H
CRC lower byte 9BH
CRC higher byte 3FH
End Transmission time for 3.5 bytes
Fig.12-10: Function 0x08_slave response
● Function 0x10: Write N words, range: 1 ─ 16.
Example: To modify 2 continuous resisters start from 0109H with words
003CH and 0050H with slave converter address 01H. The frame structure is
described in fig. 12-11 "Function 0x10_master request" on page 183 and fig.
12-12 "Function 0x10_slave response" on page 184 .
Start Transmission time for 3.5 bytes
Slave address 01H
DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv Bosch Rexroth AG 183/219
Communication Protocols