![background image](http://html1.mh-extra.com/html/omron/cp1h-cpu-05-2006/cp1h-cpu-05-2006_operation-manual_742082369.webp)
338
Serial Communications
Section 6-1
Error Codes
The following error codes are stored in an allocated DM Area word when an
error occurs in Modbus-RTU Easy Master function execution.
Auxiliary Area Flags
and Bits
The Modbus-RTU command set in the DM fixed allocation words for the Mod-
bus-RTU Easy Master is automatically sent when the Modbus-RTU Master
Execution Bit is turned ON. The results (normal or error) will be given in corre-
sponding flags.
Code
Name
Description
0x00
Normal end
Not an error.
0x01
Illegal address
The slave address specified in the parameter
is illegal (248 or higher).
0x02
Illegal function code
The function code specified in the parameter is
illegal.
0x03
Data length overflow
There are more than 94 data bytes.
0x04
Serial communica-
tions mode error
The Modbus-RTU Easy Master function was
executed when the serial communications
mode was not the Serial Gateway Mode.
0x80
Response timeout
A response was not received from the Servo.
0x81
Parity error
A parity error occurred.
0x82
Framing error
A framing error occurred.
0x83
Overrun error
An overrun error occurred.
0x84
CRC error
A CRC error occurred.
0x85
Incorrect confirmation
address
The slave address in the response is differ-
ence from the one in the request.
0x86
Incorrect confirmation
function code
The function code in the response is difference
from the one in the request.
0x87
Response size over-
flow
The response frame is larger than the storage
area (92 bytes).
0x88
Exception response
An exception response was received from the
slave.
0x89
Service being exe-
cuted
A service is already being executed (reception
traffic congestion).
0x8A
Execution canceled
Executing the service has been canceled.
0x8f
Other error
Other FINS response code was received.
Word
Bit
Port
Contents
A640
00
Port 2
Modbus-RTU Master Execution Bit
Turned ON: Execution started
ON: Execution in progress.
OFF: Not executed or execution completed.
01
Modbus-RTU Master Execution Normal Flag
ON: Execution normal.
OFF: Execution error or still in progress.
02
Modbus-RTU Master Execution Error Flag
ON: Execution error.
OFF: Execution normal or still in progress.
Summary of Contents for CP1H-CPU - 05-2006
Page 2: ...CP1H X40D CP1H XA40D CP1H Y20DT D CP1H CPU Unit Operation Manual Revised May 2006...
Page 3: ...iv...
Page 11: ...xii TABLE OF CONTENTS...
Page 15: ...xvi...
Page 19: ...xx...
Page 31: ...xxxii Conformance to EC Directives 6...
Page 71: ...40 Function Blocks Section 1 5...
Page 133: ...102 Computing the Cycle Time Section 2 7...
Page 169: ...138 CPM1A Expansion I O Unit Wiring Section 3 6...
Page 411: ...380 Clock Section 6 8...
Page 519: ...488 Replacing User serviceable Parts Section 10 2...
Page 527: ...496 Standard Models Appendix A...
Page 535: ...504 Dimensions Diagrams Appendix B...
Page 628: ...597 Connections to Serial Communications Option Boards Appendix F Connecting to Unit...
Page 629: ...598 Connections to Serial Communications Option Boards Appendix F...
Page 659: ...628 PLC Setup Appendix G...
Page 665: ...634 Index work words 159 write protection 370...
Page 667: ...636 Revision History...