Delta AH500 Hardware Operation Manual page 581

A H 5 0 0 H a r d w a r e a n d O p e r a t i o n M a n u a l
Error
Description
Code
There is a routing response
16#6606
timeout.
An error occurs when a Modbus
16#6700
TCP data exchange is initialized.
Modbus TCP data exchange
16#6701
timeout
The data received by means of a
16#6702 Modbus TCP data exchange is
incorrect.
The CPU module does not support
16#7002
the function.
16#7203 Invalid access code
16#7401 Function code error
The size of a packet exceeds the
16#7402
maximum data length.
16#7404 Packet format error
16#7405 The number of bytes is incorrect.
16#7406 Checksum error
There are non-ASCII characters in
16#7407
a command.
16#7408 The PLC is running.
Data is being written to the
memory in the PLC or data fails to
16#740A
be written to the memory in the
PLC.
The CPU module is being reset, or
16#740B the values in the laching devices
are being cleared.
The backplane number in a
16#740C communication command is
incorrect.
The slot number in a
16#740D communication command is
incorrect.
An error occurs when the the data
16#740E in the memory in the PLC is
cleared.
16#740F Communication timeout
The function code in a reply
16#7410
command is incorrect.
Owing to the fact that SW1 is ON,
16#7412 data can not be downloaded to the
CPU module.
1 2 - 3 2
Solution
1. Check the network configuration in NWCONFIG.
2. Check whether the setting of the communication
timeout conform to the practical application.
Please check setting values, and download them again.
Please check whether the remote device supports the
Modbus communication protocol.
Please check whether the remote device supports the
Modbus communication protocol.
Please check the version of the firmware installed on the
CPU module.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
Please check the contents of the packet sent by the
remote device.
When the PLC is running, data such as a program and
CPU parameters can not be downloaded to the PLC.
Data is being written to the flash memory/SD card.
Please try again later.
The CPU module is being reset, or the values in the
laching devices are being cleared. Please try again later.
Please check the version of the firmware installed on the
CPU module and the version of ISPSoft, and contact the
local authorized distributors.
Please check the version of the firmware installed on the
CPU module and the version of ISPSoft, and contact the
local authorized distributors.
Please try agin. If the problem persists, contact the local
authorized distributors.
Please check whether the remote device operates
normally.
Please check the contents of the packet sent by the
remote device.
Please make sure that SW1 is OFF.