Mitsubishi Electric MELSEC iQ-R Series User Manual page 186

Troubleshooting on the communication with a network camera
Symptom
Unable to start communication with a
network camera.
The communication is frequently
disconnected.
('00600: communication retry start'
occurs in the event history.)
The communication with a network
camera does not restart after it is
disconnected.
An error occurs in the communication
with a network camera even when
"Warning" is set for "Error due to
communication with a network
camera" under "Operation Setting at
Event Detection."
*1 Devices on Ethernet have the correspondence table between IP addresses and MAC addresses called the ARP cache. When replacing
a device on the line with one with the same IP address, the MAC address does not match between the ARP cache and the new device
and the communication may not be established normally. The ARP cache is updated when the device is reset or a certain period of time
elapses. The time differs depending on the device.
5 TROUBLESHOOTING
184
5.7 Camera Recorder Module
Check point
Is the Ethernet cable connected properly?
Is the power of the network camera, PoE switching hub, or
router, etc. turned ON?
Has an error occurred in the network camera, PoE
switching hub, or router, etc.?
Has a device on the line been replaced (with one with the
same IP address), such as a CPU module, connected
device (personal computer), hub, or router, etc.?
Is the IP address of the network camera specified
correctly?
Is the network camera supported by a camera recorder
module?
Is the IP address duplicated in the system?
Are there a firewall and proxy server in the connection
route?
Is the network camera in a state where it cannot respond,
such as while being started?
Is the bit rate high to the communication band?
Is the time in a CPU module changed after starting the
operation of a camera recorder module?
Is a camera recorder module with a firmware version
supporting this setting used?
Corrective action
If it is not connected properly, take the following actions:
• Lock the cable securely.
• Check the wiring. (MELSEC iQ-R System Recorder
User's Manual (Startup))
Turn the power ON.
Refer to the manual for each device to take corrective
action.
*1
Reset the devices on the line.
Search for the network camera in the module extended
parameter. (Page 103 Module Extended Parameters
(Camera Recorder Module))
If whether the network camera exists cannot be checked,
there is any problem in the network configuration used. In
this case, contact the system administrator or network
administrator.
Check if a network camera supported by the camera
recorder module is used.
(MELSEC iQ-R System Recorder User's Manual
(Startup))
• Review the setting to avoid IP address duplication in
the system.
• Review the settings for all modules used to avoid IP
address duplication of the network camera in the
module extended parameter.
Check the firewall and proxy server settings with the
network administrator.
• Make sure that the network camera is ready to
respond.
• Refer to the manual for the network camera to take
corrective action.
• Lower the maximum video bit rate in the module
extended parameter. (Page 103 Module Extended
Parameters (Camera Recorder Module))
• For the network configuration used, contact the system
administrator or network administrator.
If the clock data in the CPU module is changed after
starting the operation of the system, it may take time to
synchronize the time between the camera recorder
module and network camera. In this case, wait until the
time synchronization is completed.
Update the module to a firmware version supporting this
setting.
For the applicable firmware versions, refer to the
following:
Page 307 Added and Changed Functions