15
Give the Drive a 75% Reference via Modbus RTU
Modbus RTU Function: 0F
HEX
(Force Multiple Coils)
Overview:
•
Force coils 17
10
through 32
10
to 3000
HEX
.
Because a value of 4000
HEX
represents a 100% reference, the value for a 75%
reference is 3000
HEX
.
The value of coil 11 must have previously been set to 1 for the drive to respond to
the changed speed reference.
Message from Modbus RTU Master to Drive
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Slave Address
Function
Coil Addr.,
High
Coil Addr.
Low
No. of Coils,
High
No. of Coils,
Low
01 0F 00 10 00 10
Byte 6
Byte 7
CRC Error Check
55 C2
Example 2
{
Byte 0
Byte 1
Byte 2
Byte 3
Byte 4
Byte 5
Byte 6
Slave Address
Function
Coil Addr.,
High
Coil Addr.
Low
# of Coils,
High
# of Coils,
Low
Byte Count
01 0F 00 10 00 10 02
Byte 7
Byte 8
Byte 09
Byte 10
Force Coils
Addr. 16-23
Force Coils
Addr, 24-31
CRC Error Check
00 30 E0 A4
Modbus RTU message string:
[01] [0F] [00] [10] [00] [10] [02] [00] [30] [E0] [A4]
Commanded Reference: 75% of 4000
HEX
= 3000
HEX
Message returned from Drive to Modbus RTU Master
Содержание Mobrus RTU TR1 Series
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