AMCI NR60E2, Руководство пользователя

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M
ODBUS
TCP C
ONFIGURATION
Modbus TCP protocol
ADVANCED MICRO CONTROLS INC.
74
Output Data Format (continued)
Configuration Word
Figure R4.3 Configuration Word Format
DCTog:
Direction Control Toggle bit. When this bit equals “0”, the position value will increase with clock-
wise rotation when looking at the front of the shaft. When this bit equals “1” the position value will
increase with counter-clockwise rotation when looking at the front of the shaft.
SFCtrl:
Scaling Function Control bit. When this bit equals “0”, the position resolution will be 65,536 counts
per turn. When this bit equals “1”, the position resolution will be set by the Measuring Units per
Span parameter value contained in registers 1028 and 1029. The
Total Measurement Range parame-
ter is not affected by the state of the Scaling Function Control bit.
Input Data Format
Table R4.5 shows the format of the data that can be read from the NR60E2. Both are 32 bit values that use the
little endian format.
Table R4.5 Modbus Input Data Format
Register Data Value Example
0
32 bit Scaled Position Value.
This data is the calculated position data. Its
value is affected by the Measuring Units per Span parameter if the Scaling
Function Control bit equals “1”. This value can also be preset to any value
within its range by using the Apply Preset Value command. The lower 16
bits of this value are in register 0. A Position Value of 84,742,977
(0x050D 1341) is shown as an example.
0x1341
1 0x050D
2
32 bit Velocity data.
This data is the calculated change in position over time.
The unit of measure is set with the Velocity Format parameter. If the Scal-
ing Function Control bit is ever set to a “1”, the position data used to cal-
culate the velocity data is always scaled by the Measuring Units per Span
parameter. The lower 16 bits of this value are in register 2. A Velocity
reading of 76,754 (0x0001 2BD2) is shown as an example.
0x2BD2
3 0x0001
Configuration Word
SF
Ctr
l
RESERVED: Bit must equal zero.
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00