Emerson Unidrive M400 - Page 128

128 SI-Ethernet User Guide
Issue: 1
Example
To write the value 12345 to drive parameters 0.20.021 through 0.20.023 and read the
values of parameters 0.20.024 through 0.20.026 (Transaction ID=42) using standard
addressing:
Master request data Slave response data
Byte
Hex
value
Description Byte
Hex
value
Description
0-1 00 2A
Transaction ID
(42)
0-1 00 2A
Transaction ID
(42)
2-3 00 00
Protocol ID
(0=TCP/IP)
2-3 00 00
Protocol ID
(0=TCP/IP)
4-5 00 17
Length
(Bytes=6)
4-5 00 0F
Length
(Bytes=15)
6FF
Unit identifier
(FF= Drive)
6FF
Unit identifier
(FF= Drive)
717
Function code
(23)
717
Function code
(23)
8-9 47 E7
Start read register
(20.023)
80C
Length of data
(Bytes=12)
10-11 00 06
Number of read registers
(6)
9-12
?? ??
?? ??
Register data 0
(Pr 20.024)
12-13 47 E4
Start write register
(20.020)
13-16
?? ??
?? ??
Register data 1
(Pr 20.025)
14-15 00 06
Number of write registers
(6)
17-20
?? ??
?? ??
Register data 2
(Pr 20.026)
16 0C
Length of register data to
write
(Bytes=12)
17-20
00 00
30 39
Register data 0
(12345)
21-24
00 00
30 39
Register data 1
(12345)
25-28
00 00
30 39
Register data 2
(12345)