AMCI SV160E2, Руководство пользователя, Страница: 57 / 120

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REFERENCE 6
C
OMMAND
M
ODE
D
ATA
F
ORMAT
Command Bits Must Transition
This condition also applies when switching from Configuration Mode to Command Mode. If a bit is set in
Configuration Word 0 while in Configuration Mode and you switch to Command Mode with the same bit set,
the command will not occur because the bit must transition between writes to the unit.
The command bits are split between 2 sixteen bit words, Command Word 0 and Command Word 1. Only one
bit in Command Word 0 can make a 0

1 transition at a time. All other bits in Command Word must be zero.
Data Format
An SV160E2 requires twenty bytes of Output Data as well as twenty bytes of Input Data. These bytes are a
mix of sixteen and thirty-two bit integers.
EtherNet/IP uses the little endian format for thirty-two bit integers, while PROFINET and Modbus TCP uses
big endian format by default. The endian format used by the SV160E2 is programmable in the configuration
data using the Data_Endian parameter. The default is little endian.
Output Data Format
The following table shows the format of the output network data words when writing command data to the
SV160E2. EtherNet/IP, PROFINET, and Modbus TCP address are shown.
Figure R6.1 Command Data Format
This chapter covers the formats of the Network Output Data used to command the
SV160E2 and the formats of the Network Input Data that contains the responses
from the device. An SV160E2 requires twenty bytes of Output Data as well as
twenty bytes for Input Data.
Commands are only accepted when a command bit makes a 0

1 transition and
only one bit can make this transition at a time. (All other bits must be zero.) The
easiest way to do this is to write a value of zero into the Command Word 0 before
writing the next command.
EtherNet/IP
or PROFINET
Word
Modbus/TCP
Register
Function
0 1024 Command Word 0
1 1025 Command Word 1
2 1026
Command Parameters
Word meaning depends
on the command set
to the SV160E2
3 1027
4 1028
5 1029
6 1030
7 1031
8 1032
9 1033