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11
TROUBLESHOOTING
11.5 Conducting PING Test to Check QJ71MT91 Connection
Address
0FE0
H
Communication time check
(4064)
0FE1
H
Transmission count
(4065)
0FE2
to 0FE3
H
H
IP address
(4066 to 4067)
0FE4
H
(4068)
PING test
0FE5
execution
H
(4069)
results
0FE6
H
(4070)
0FE7
H
(4071)
11 - 44
This section explains how to conduct a PING test in the QJ71MT91.
Method
From GX Configurator-MB
From sequence program
(1) PING test
(a) A PING test checks whether the other QJ71MT91 or MODBUS/TCP device
exists or not on Ethernet (same subnet address) where the QJ71MT91 is
connected, or if a target device (personal computer) having the specified IP
address exists or not.
(b) Perform a PING test to check the following.
1) Whether the QJ71MT91 is correctly connected to the other device on the
line.
2) Whether the basic parameter setting of the QJ71MT91 is correct.
(2) Buffer memory addresses used for PING test
The following buffer memory addresses are used for a PING test.
Parameter Name
Specify the waiting time for
completion of the PING test.
Set time = set value × 500ms
Specify the number of
transmissions.
Specify the IP address of the
PING test target device.
• The execution result of the
Execution result
• When completed with an
Total packet
transmission count
The total packet transmission
count, success count and
Success count
failure count for the PING test
execution are stored.
Failure count
*1: Set the value that satisfies the following conditions.
Condition 1: The IP address class is any of A, B and C.
Condition 2: The host address bits are not all "0" or all "1".
Setting
PING test is stored.
error, the error code is stored.
(Refer to Section 11.3.3)
Reference Section
Section 11.5.1
Section 11.5.2
Setting Range
2 to 60
1 to 10
Refer to *1
0000
: Normal completion
H
0001
to : Error completion
H
(Error code)
MELSEC-Q
Default
2
4
00000000
H
0000
H
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