Omron CompoNet MX2 Series User Manual page 113

Precautions for Correct Use Precautions for Correct Use
The Register No. and read/write data are the same as those for Modbus communication. For
these settings, refer to Section 6-8 Modbus Communication (Modbus-RTU) Data List of the
MX2 User's Manual (Cat. No. I570) and 8-5 Modbus Communication Register Number List of
the RX User's Manual (Cat. No. I578).
The error codes for the Special IO operation are listed below.
 Special Remote Input Error Codes
Error
Code
01 hex Function Code Error
02 hex Register No. Error
04 hex Slave Device Error
21 hex Data Setting Error
22 hex Write Mode Error
23 hex Register Size Error
Precautions for Correct Use Precautions for Correct Use
If a Special I/O read/write error occurs, the most significant bit (word address n, bit 7) of the
Function Code turns ON. Prepare a program that starts error processing from this bit on the
host.
Reading/Writing Input/Output Bit Data (Modbus Coil Information)
In Modbus communication, the MX2/RX-series inverters set control input, status monitor, or other bit
information as coil information. This means that you cannot set/check data by reading/writing from/to
communications registers.
Use the following registers provided to enable reading/writing of input and output bit information.
 Register No. 1F01 hex for CompoNet output (Inverter control input)
Bit 15
Name –
Value 0
Opr RUN command (0: Stop/1: Run)
Dir Rotation direction command
(0: Forward/1: Reverse)
EXT External trip
RS Reset
In1 General-purpose output terminal [1]
In2 General-purpose output terminal [2]
CompoNet Communications Unit User's Manual (I582-E1)
Name
14 13 12 11 10
In8 In7 In6 In5 In4
0 0 0 0 0
Description
A code other than 03/10/43 or 50 hex is set as function code.
The specified Register No. does not exist.
The Option Board failed to communicate with the inverter.
An upper or lower limit for the write data setting range is
exceeded.
Writing to a register that is write-prohibited or in a read-only
state (for example, during operation).
Reading/Writing 2-byte data from/to a 4-byte register or 4-byte
data from/to a 2-byte register.
9 8 7 6 5
In3 In2 In1 – –
0 0 0 0 0
In3 General-purpose output terminal [3]
In4 General-purpose output terminal [4]
In5 General-purpose output terminal [5]
In6 General-purpose output terminal [6]
In7 General-purpose output terminal [7]
In8 General-purpose output terminal [8]
4 Remote I/O
4 3 2 1 0
RS EXT Dir Opr –
0 0 0 0 0
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