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MELSEC-Q
11 TROUBLESHOOTING
(3) Program example
An example of the PING test performed with a sequence program is given below.
(a) System configuration
QJ71MT91
(Master)
Ethernet
MOBDBUS /TCP
Slave device
(192.1.0.1)
*1: The QJ71MT91 is mounted on Slot 0 of the base unit, and the head I/O No. is 0.
(b) Program conditions
This program executes a PING test when PING test execution request (Y1C)
is turned on after the PING test conditions are set.
1) PING test condition settings
Setting Item Buffer Memory Address Set Value
Communication time check 0FE0H (4064)
2
(1s)
Transmission count 0FE1H (4065)
4
(4 times)
IP address 0FE2H to 0FE3H (4066 to 4067)
C0010001
H
(192.1.0.1)
2) Devices available for user
Device Name Device Application
X0 Module READY
X3 Basic parameter setting existence
Input
X1C PING test completed
QJ71MT91 input/output
Output Y1C PING test execution request
External input (command) X20 PING test execution command
D10000 For getting execution result
D10001 For getting total packet transmission count
D10002 For getting success count
Data register
D10003 For getting failure count
U0\G4064 Communication time check
U0\G4065 Transmission count
U0\G4066 to
U0\G4067
IP address
U0\G4068 Execution result
U0\G4069 Total packet transmission count
U0\G4070 Success count
Intelligent function module
device
U0\G4071 Failure count
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