Parker P Series, Руководство пользователя, Страница: 75 / 316

Parker Hannifin
P Series User Guide 73
C. Read Holding Register (0x03)
Reads the values of single register (16bit data) and continuous register block (16bit data
unit).

Request
Function code 1Byte 0x03
Starting Address 2Byte 0x0000 to 0xFFFF
Quantity of Registers 2 Bytes 1 to 125 (0x7D)

Request OK
Function code 1Byte 0x03
Starting Address 1Byte 2 x N*
Quantity of Registers N* x 2 Bytes
*N = Quantity of Registers

Response not OK
Error code 1Byte 0x83
Exception code 1Byte 0x01 ~ 0x06
Table 26. Read Holding Register
Example1) reading a single parameter (current speed (Address: 0x2600))

Request
Node
ID
Functio
n
Starting
Address
Hi
Starting
Address
Lo
Quantity of
Register Hi.
Quantity of
Register Lo
CRC
Hi
CRC
Lo
0x01 0x03 0x26 0x00 0x00 0x01 0x8F 0x42

Request OK
Node
ID
Function Byte Count
Register
Value Hi
Register
Value Lo
CRC Hi CRC Lo
0x01 0x03 0x02 0x00 0x00 0xB8 0x44
- The current speed value is 0(or 0x0000).

Response not OK
Node ID Error Code
Exception
Code
CRC Hi CRC Lo
0x01 0x83 0x01 ~ 0x06 - -
Table 27. Example of Reading Single Parameter
Example 2) Reading multiple parameters (motor ID(Address: 0x2000), Encoder
Type(Address: 0x2001), number of encoder pulses per rotation (Address:
0x2002~0x2003))

Request
Node
ID
Function
Starting
Address
Hi
Starting
Address
Lo
Quantity of
Register Hi.
Quantity of
Register Lo
CRC Hi CRC Lo
0x01 0x03 0x20 0x00 0x00 0x04 0x4F 0XC9
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