Omron RX2 Series User Manual page 603

Read from Holding Register [03 hex]
Reads the contents of consecutive holding registers. From the specified holding register, the specified
number of holding registers can be read.
Example
To read past trip data from the inverter with slave address 5.
(Read out factors of trip monitor 1 and output frequency.)
Item
Holding register number
Data
Query
No.
1
Slave address
2 Function code
3
Register starting number (high)
4
Register starting number (low)
The number of retention registers
5
(high)
The number of retention registers
6
(low)
7 CRC-16 (high)
8 CRC-16 (low)
*1. Broadcasting cannot be performed.
*2. Note that the register start number is 03E8h hex, which is 1 less than the register number 03E9h hex.
Response
No.
1 Slave address
2 Function code
3
Data bytes
4 Register starting number (high)
5 Register starting number (low)
6 Register starting number+1 (high)
7 Register starting number+1 (low)
8 Register starting number+2 (high)
9 Register starting number+2 (low)
10 CRC-16 (high)
11 CRC-16 (low)
*1. Data as much as the number of data bytes will be transferred. In this example, the inverter sends back 4 bytes
of data from two holding registers.
If the Read from Holding Register function is executed normally, refer to Exception Response on page
9-18.
High-function General-purpose Inverter RX2 Series User's Manual
03E9h
Data Overvoltage
(E007) (0007h)
Field Name
*1
05
03
*2
03
*2
E8
00
03
84
3F
Field Name
05
03
06
*1
00
07
00
00
17
70
A8
61
9 Communications Functions
Previous factor
Example
(hex)
(Register address) = (Register number) –1
3 registers
Example
(hex)
0007 hex → 07 decimal → E07 (Factor: Overvolt-
age)
60.00Hz (000h, 1770h)
Previous inverter status
03EAh, 03EBh
60.00Hz
(0000h, 1770h)
Remarks
Remarks
9
9 - 11